entities/wfobjs.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 23 Sep 2009 11:05:14 +0200
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child 3451 6b46d73823f5
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use self._cw instead of self.req
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"""workflow definition and history related entities
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:organization: Logilab
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:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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__docformat__ = "restructuredtext en"
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from warnings import warn
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from logilab.common.decorators import cached, clear_cache
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from logilab.common.deprecation import deprecated
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from cubicweb.entities import AnyEntity, fetch_config
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from cubicweb.interfaces import IWorkflowable
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from cubicweb.common.mixins import MI_REL_TRIGGERS
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class WorkflowException(Exception): pass
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class Workflow(AnyEntity):
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    __regid__ = 'Workflow'
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    @property
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    def initial(self):
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        """return the initial state for this workflow"""
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        return self.initial_state and self.initial_state[0] or None
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    def is_default_workflow_of(self, etype):
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        """return True if this workflow is the default workflow for the given
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        entity type
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        """
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        return any(et for et in self.reverse_default_workflow
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                   if et.name == etype)
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    def after_deletion_path(self):
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        """return (path, parameters) which should be used as redirect
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        information when this entity is being deleted
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        """
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        if self.workflow_of:
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            return self.workflow_of[0].rest_path(), {'vid': 'workflow'}
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        return super(Workflow, self).after_deletion_path()
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    def iter_workflows(self, _done=None):
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        """return an iterator on actual workflows, eg this workflow and its
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        subworkflows
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        """
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        # infinite loop safety belt
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        if _done is None:
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            _done = set()
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        yield self
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        _done.add(self.eid)
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        for tr in self._cw.execute('Any T WHERE T is WorkflowTransition, '
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                                   'T transition_of WF, WF eid %(wf)s',
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                                   {'wf': self.eid}).entities():
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            if tr.subwf.eid in _done:
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                continue
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            for subwf in tr.subwf.iter_workflows(_done):
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                yield subwf
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    # state / transitions accessors ############################################
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    def state_by_name(self, statename):
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        rset = self._cw.execute('Any S, SN WHERE S name SN, S name %(n)s, '
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                                'S state_of WF, WF eid %(wf)s',
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                                {'n': statename, 'wf': self.eid}, 'wf')
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        if rset:
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            return rset.get_entity(0, 0)
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        return None
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    def state_by_eid(self, eid):
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        rset = self._cw.execute('Any S, SN WHERE S name SN, S eid %(s)s, '
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                                'S state_of WF, WF eid %(wf)s',
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                                {'s': eid, 'wf': self.eid}, ('wf', 's'))
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        if rset:
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            return rset.get_entity(0, 0)
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        return None
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    def transition_by_name(self, trname):
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        rset = self._cw.execute('Any T, TN WHERE T name TN, T name %(n)s, '
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                                'T transition_of WF, WF eid %(wf)s',
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                                {'n': trname, 'wf': self.eid}, 'wf')
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        if rset:
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            return rset.get_entity(0, 0)
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        return None
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    def transition_by_eid(self, eid):
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        rset = self._cw.execute('Any T, TN WHERE T name TN, T eid %(t)s, '
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                                'T transition_of WF, WF eid %(wf)s',
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                                {'t': eid, 'wf': self.eid}, ('wf', 't'))
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        if rset:
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            return rset.get_entity(0, 0)
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        return None
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    # wf construction methods ##################################################
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    def add_state(self, name, initial=False, **kwargs):
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        """add a state to this workflow"""
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        state = self._cw.create_entity('State', name=unicode(name), **kwargs)
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        self._cw.execute('SET S state_of WF WHERE S eid %(s)s, WF eid %(wf)s',
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                         {'s': state.eid, 'wf': self.eid}, ('s', 'wf'))
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        if initial:
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            assert not self.initial
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            self._cw.execute('SET WF initial_state S '
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                             'WHERE S eid %(s)s, WF eid %(wf)s',
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                             {'s': state.eid, 'wf': self.eid}, ('s', 'wf'))
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        return state
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    def _add_transition(self, trtype, name, fromstates,
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                        requiredgroups=(), conditions=(), **kwargs):
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        tr = self._cw.create_entity(trtype, name=unicode(name), **kwargs)
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        self._cw.execute('SET T transition_of WF '
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                         'WHERE T eid %(t)s, WF eid %(wf)s',
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                         {'t': tr.eid, 'wf': self.eid}, ('t', 'wf'))
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        assert fromstates, fromstates
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        if not isinstance(fromstates, (tuple, list)):
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            fromstates = (fromstates,)
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        for state in fromstates:
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            if hasattr(state, 'eid'):
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                state = state.eid
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            self._cw.execute('SET S allowed_transition T '
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                             'WHERE S eid %(s)s, T eid %(t)s',
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                             {'s': state, 't': tr.eid}, ('s', 't'))
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        tr.set_transition_permissions(requiredgroups, conditions, reset=False)
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        return tr
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    def add_transition(self, name, fromstates, tostate,
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                       requiredgroups=(), conditions=(), **kwargs):
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        """add a transition to this workflow from some state(s) to another"""
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        tr = self._add_transition('Transition', name, fromstates,
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                                  requiredgroups, conditions, **kwargs)
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        if hasattr(tostate, 'eid'):
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            tostate = tostate.eid
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        self._cw.execute('SET T destination_state S '
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                         'WHERE S eid %(s)s, T eid %(t)s',
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                         {'t': tr.eid, 's': tostate}, ('s', 't'))
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        return tr
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    def add_wftransition(self, name, subworkflow, fromstates, exitpoints,
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                       requiredgroups=(), conditions=(), **kwargs):
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        """add a workflow transition to this workflow"""
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        tr = self._add_transition('WorkflowTransition', name, fromstates,
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                                  requiredgroups, conditions, **kwargs)
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        if hasattr(subworkflow, 'eid'):
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            subworkflow = subworkflow.eid
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        self._cw.execute('SET T subworkflow WF WHERE WF eid %(wf)s,T eid %(t)s',
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                         {'t': tr.eid, 'wf': subworkflow}, ('wf', 't'))
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        for fromstate, tostate in exitpoints:
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            tr.add_exit_point(fromstate, tostate)
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        return tr
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class BaseTransition(AnyEntity):
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    """customized class for abstract transition
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    provides a specific may_be_fired method to check if the relation may be
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    fired by the logged user
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    """
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    __regid__ = 'BaseTransition'
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    fetch_attrs, fetch_order = fetch_config(['name'])
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    def __init__(self, *args, **kwargs):
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        if self.__regid__ == 'BaseTransition':
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            raise WorkflowException('should not be instantiated')
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        super(BaseTransition, self).__init__(*args, **kwargs)
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    @property
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    def workflow(self):
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        return self.transition_of[0]
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    def has_input_state(self, state):
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        if hasattr(state, 'eid'):
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            state = state.eid
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        return any(s for s in self.reverse_allowed_transition if s.eid == state)
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    def may_be_fired(self, eid):
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        """return true if the logged user may fire this transition
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        `eid` is the eid of the object on which we may fire the transition
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        """
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        user = self._cw.user
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        # check user is at least in one of the required groups if any
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        groups = frozenset(g.name for g in self.require_group)
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        if groups:
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            matches = user.matching_groups(groups)
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            if matches:
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                return matches
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            if 'owners' in groups and user.owns(eid):
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                return True
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        # check one of the rql expression conditions matches if any
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        if self.condition:
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            for rqlexpr in self.condition:
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                if rqlexpr.check_expression(self._cw, eid):
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                    return True
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        if self.condition or groups:
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            return False
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        return True
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    def after_deletion_path(self):
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        """return (path, parameters) which should be used as redirect
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        information when this entity is being deleted
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        """
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        if self.transition_of:
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            return self.transition_of[0].rest_path(), {}
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        return super(Transition, self).after_deletion_path()
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    def set_transition_permissions(self, requiredgroups=(), conditions=(),
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                                   reset=True):
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        """set or add (if `reset` is False) groups and conditions for this
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        transition
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        """
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        if reset:
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            self._cw.execute('DELETE T require_group G WHERE T eid %(x)s',
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                             {'x': self.eid}, 'x')
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            self._cw.execute('DELETE T condition R WHERE T eid %(x)s',
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                             {'x': self.eid}, 'x')
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        for gname in requiredgroups:
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            rset = self._cw.execute('SET T require_group G '
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                                    'WHERE T eid %(x)s, G name %(gn)s',
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                                    {'x': self.eid, 'gn': gname}, 'x')
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            assert rset, '%s is not a known group' % gname
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        if isinstance(conditions, basestring):
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            conditions = (conditions,)
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        for expr in conditions:
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            if isinstance(expr, str):
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                expr = unicode(expr)
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            self._cw.execute('INSERT RQLExpression X: X exprtype "ERQLExpression", '
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                             'X expression %(expr)s, T condition X '
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                             'WHERE T eid %(x)s',
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                             {'x': self.eid, 'expr': expr}, 'x')
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        # XXX clear caches?
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class Transition(BaseTransition):
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    """customized class for Transition entities"""
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    __regid__ = 'Transition'
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    def destination(self):
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        return self.destination_state[0]
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class WorkflowTransition(BaseTransition):
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    """customized class for WorkflowTransition entities"""
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    __regid__ = 'WorkflowTransition'
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    @property
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    def subwf(self):
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        return self.subworkflow[0]
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    def destination(self):
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        return self.subwf.initial
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    def add_exit_point(self, fromstate, tostate):
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        if hasattr(fromstate, 'eid'):
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            fromstate = fromstate.eid
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        if hasattr(tostate, 'eid'):
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            tostate = tostate.eid
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        self._cw.execute('INSERT SubWorkflowExitPoint X: T subworkflow_exit X, '
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                         'X subworkflow_state FS, X destination_state TS '
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                         'WHERE T eid %(t)s, FS eid %(fs)s, TS eid %(ts)s',
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                         {'t': self.eid, 'fs': fromstate, 'ts': tostate},
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                         ('t', 'fs', 'ts'))
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    def get_exit_point(self, state):
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        """if state is an exit point, return its associated destination state"""
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        if hasattr(state, 'eid'):
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            state = state.eid
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        stateeid = self.exit_points().get(state)
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        if stateeid is not None:
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            return self._cw.entity_from_eid(stateeid)
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        return None
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    @cached
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    def exit_points(self):
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        result = {}
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        for ep in self.subworkflow_exit:
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            result[ep.subwf_state.eid] = ep.destination.eid
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        return result
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    def clear_all_caches(self):
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        super(WorkflowableMixIn, self).clear_all_caches()
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        clear_cache(self, 'exit_points')
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class SubWorkflowExitPoint(AnyEntity):
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    """customized class for SubWorkflowExitPoint entities"""
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    __regid__ = 'SubWorkflowExitPoint'
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    @property
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    def subwf_state(self):
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        return self.subworkflow_state[0]
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    @property
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    def destination(self):
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        return self.destination_state[0]
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class State(AnyEntity):
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    """customized class for State entities"""
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    __regid__ = 'State'
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    fetch_attrs, fetch_order = fetch_config(['name'])
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    rest_attr = 'eid'
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    @property
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    def workflow(self):
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        # take care, may be missing in multi-sources configuration
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        return self.state_of and self.state_of[0]
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0
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    def after_deletion_path(self):
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        """return (path, parameters) which should be used as redirect
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        information when this entity is being deleted
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        """
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        if self.state_of:
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            return self.state_of[0].rest_path(), {}
0
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        return super(State, self).after_deletion_path()
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0
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class TrInfo(AnyEntity):
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    """customized class for Transition information entities
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    """
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    __regid__ = 'TrInfo'
0
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    fetch_attrs, fetch_order = fetch_config(['creation_date', 'comment'],
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                                            pclass=None) # don't want modification_date
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    @property
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    def for_entity(self):
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        return self.wf_info_for[0]
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0
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    @property
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    def previous_state(self):
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        return self.from_state[0]
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    @property
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    def new_state(self):
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        return self.to_state[0]
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    @property
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    def transition(self):
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        return self.by_transition and self.by_transition[0] or None
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0
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    def after_deletion_path(self):
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        """return (path, parameters) which should be used as redirect
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        information when this entity is being deleted
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        """
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        if self.for_entity:
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            return self.for_entity.rest_path(), {}
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        return 'view', {}
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class WorkflowableMixIn(object):
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    """base mixin providing workflow helper methods for workflowable entities.
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    This mixin will be automatically set on class supporting the 'in_state'
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    relation (which implies supporting 'wf_info_for' as well)
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    """
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    __implements__ = (IWorkflowable,)
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    @property
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    def main_workflow(self):
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parents: 2917
diff changeset
   358
        """return current workflow applied to this entity"""
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   359
        if self.custom_workflow:
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   360
            return self.custom_workflow[0]
2946
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   361
        return self.cwetype_workflow()
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   362
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   363
    @property
2978
d8c5ad14ab8e [wf] distinguish main workflow / current workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2976
diff changeset
   364
    def current_workflow(self):
d8c5ad14ab8e [wf] distinguish main workflow / current workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2976
diff changeset
   365
        """return current workflow applied to this entity"""
2991
dab951c08896 cleanup
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2990
diff changeset
   366
        return self.current_state and self.current_state.workflow or self.main_workflow
2978
d8c5ad14ab8e [wf] distinguish main workflow / current workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2976
diff changeset
   367
d8c5ad14ab8e [wf] distinguish main workflow / current workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2976
diff changeset
   368
    @property
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   369
    def current_state(self):
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   370
        """return current state entity"""
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   371
        return self.in_state and self.in_state[0] or None
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   372
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   373
    @property
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   374
    def state(self):
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   375
        """return current state name"""
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   376
        try:
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   377
            return self.in_state[0].name
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   378
        except IndexError:
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   379
            self.warning('entity %s has no state', self)
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   380
            return None
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   381
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   382
    @property
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   383
    def printable_state(self):
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   384
        """return current state name translated to context's language"""
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   385
        state = self.current_state
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   386
        if state:
3406
e343f37f7013 use self._cw instead of self.req
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3405
diff changeset
   387
            return self._cw._(state.name)
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   388
        return u''
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   389
2947
083593802120 [wf] new workflow_history property, nicer the reverse_wf_info_for...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2946
diff changeset
   390
    @property
083593802120 [wf] new workflow_history property, nicer the reverse_wf_info_for...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2946
diff changeset
   391
    def workflow_history(self):
083593802120 [wf] new workflow_history property, nicer the reverse_wf_info_for...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2946
diff changeset
   392
        """return the workflow history for this entity (eg ordered list of
083593802120 [wf] new workflow_history property, nicer the reverse_wf_info_for...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2946
diff changeset
   393
        TrInfo entities)
083593802120 [wf] new workflow_history property, nicer the reverse_wf_info_for...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2946
diff changeset
   394
        """
083593802120 [wf] new workflow_history property, nicer the reverse_wf_info_for...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2946
diff changeset
   395
        return self.reverse_wf_info_for
083593802120 [wf] new workflow_history property, nicer the reverse_wf_info_for...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2946
diff changeset
   396
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   397
    def latest_trinfo(self):
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   398
        """return the latest transition information for this entity"""
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   399
        return self.reverse_wf_info_for[-1]
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   400
2946
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   401
    @cached
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   402
    def cwetype_workflow(self):
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   403
        """return the default workflow for entities of this type"""
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   404
        # XXX CWEType method
3406
e343f37f7013 use self._cw instead of self.req
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3405
diff changeset
   405
        wfrset = self._cw.execute('Any WF WHERE X is ET, X eid %(x)s, '
2946
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   406
                                  'WF workflow_of ET', {'x': self.eid}, 'x')
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   407
        if len(wfrset) == 1:
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   408
            return wfrset.get_entity(0, 0)
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   409
        if len(wfrset) > 1:
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   410
            for wf in wfrset.entities():
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   411
                if wf.is_default_workflow_of(self.id):
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   412
                    return wf
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   413
            self.warning("can't find default workflow for %s", self.id)
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   414
        else:
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   415
            self.warning("can't find any workflow for %s", self.id)
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   416
        return None
957fd4b276e2 [wf] refactor current_workflow by extracting cwetype_workflow method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2945
diff changeset
   417
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   418
    def possible_transitions(self):
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   419
        """generates transition that MAY be fired for the given entity,
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   420
        expected to be in this state
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   421
        """
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   422
        if self.current_state is None or self.current_workflow is None:
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   423
            return
3406
e343f37f7013 use self._cw instead of self.req
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3405
diff changeset
   424
        rset = self._cw.execute(
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   425
            'Any T,N WHERE S allowed_transition T, S eid %(x)s, '
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   426
            'T name N, T transition_of WF, WF eid %(wfeid)s',
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   427
            {'x': self.current_state.eid,
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   428
             'wfeid': self.current_workflow.eid}, 'x')
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   429
        for tr in rset.entities():
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   430
            if tr.may_be_fired(self.eid):
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   431
                yield tr
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   432
2989
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   433
    def _add_trinfo(self, comment, commentformat, treid=None, tseid=None):
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   434
        kwargs = {}
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   435
        if comment is not None:
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   436
            kwargs['comment'] = comment
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   437
            if commentformat is not None:
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   438
                kwargs['comment_format'] = commentformat
2989
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   439
        args = [('wf_info_for', 'E')]
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   440
        kwargs['E'] = self.eid
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   441
        if treid is not None:
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   442
            args.append( ('by_transition', 'T') )
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   443
            kwargs['T'] = treid
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   444
        if tseid is not None:
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   445
            args.append( ('to_state', 'S') )
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   446
            kwargs['S'] = tseid
3406
e343f37f7013 use self._cw instead of self.req
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3405
diff changeset
   447
        return self._cw.create_entity('TrInfo', *args, **kwargs)
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   448
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   449
    def fire_transition(self, trname, comment=None, commentformat=None):
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   450
        """change the entity's state by firing transition of the given name in
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   451
        entity's workflow
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   452
        """
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   453
        assert self.current_workflow
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   454
        tr = self.current_workflow.transition_by_name(trname)
2989
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   455
        assert tr is not None, 'not a %s transition: %s' % (self.id, trname)
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   456
        return self._add_trinfo(comment, commentformat, tr.eid)
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   457
2989
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   458
    def change_state(self, statename, comment=None, commentformat=None, tr=None):
2980
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   459
        """change the entity's state to the given state (name or entity) in
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   460
        entity's workflow. This method should only by used by manager to fix an
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   461
        entity's state when their is no matching transition, otherwise
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   462
        fire_transition should be used.
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   463
        """
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   464
        assert self.current_workflow
2980
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   465
        if hasattr(statename, 'eid'):
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   466
            stateeid = statename.eid
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   467
        else:
2980
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   468
            if not isinstance(statename, basestring):
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   469
                warn('give a state name')
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   470
                state = self.current_workflow.state_by_eid(statename)
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   471
            else:
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   472
                state = self.current_workflow.state_by_name(statename)
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   473
            if state is None:
2989
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   474
                raise WorkflowException('not a %s state: %s' % (self.id,
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   475
                                                                statename))
2980
292387ed37f3 [wf] allow state entity as argument to change_state
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2978
diff changeset
   476
            stateeid = state.eid
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   477
        # XXX try to find matching transition?
2989
dfb3506647e4 [wf] refactor change_state/fire_transition to share more code, change_state can also take an optional tr argument
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2988
diff changeset
   478
        return self._add_trinfo(comment, commentformat, tr and tr.eid, stateeid)
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   479
2990
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   480
    def subworkflow_input_transition(self):
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   481
        """return the transition which has went through the current sub-workflow
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   482
        """
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   483
        if self.main_workflow.eid == self.current_workflow.eid:
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   484
            return # doesn't make sense
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   485
        subwfentries = []
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   486
        for trinfo in reversed(self.workflow_history):
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   487
            if (trinfo.transition and
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   488
                trinfo.previous_state.workflow.eid != trinfo.new_state.workflow.eid):
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   489
                # entering or leaving a subworkflow
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   490
                if (subwfentries and
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   491
                    subwfentries[-1].new_state.workflow.eid == trinfo.previous_state.workflow.eid):
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   492
                    # leave
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   493
                    del subwfentries[-1]
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   494
                else:
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   495
                    # enter
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   496
                    subwfentries.append(trinfo)
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   497
        if not subwfentries:
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   498
            return None
f221ba8552ab [wf] new method on WorkflowableMixIn to get the transition which had led to the current sub-workflow
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2989
diff changeset
   499
        return subwfentries[-1].transition
2948
d3cd8bd20ee5 override clear_all_caches to clear cwetype_workflow cache
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2947
diff changeset
   500
d3cd8bd20ee5 override clear_all_caches to clear cwetype_workflow cache
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2947
diff changeset
   501
    def clear_all_caches(self):
d3cd8bd20ee5 override clear_all_caches to clear cwetype_workflow cache
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2947
diff changeset
   502
        super(WorkflowableMixIn, self).clear_all_caches()
d3cd8bd20ee5 override clear_all_caches to clear cwetype_workflow cache
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2947
diff changeset
   503
        clear_cache(self, 'cwetype_workflow')
d3cd8bd20ee5 override clear_all_caches to clear cwetype_workflow cache
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2947
diff changeset
   504
3405
9d31c9cb8103 nicer deprecation warnings
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3377
diff changeset
   505
    @deprecated('[3.5] get transition from current workflow and use its may_be_fired method')
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   506
    def can_pass_transition(self, trname):
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   507
        """return the Transition instance if the current user can fire the
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   508
        transition with the given name, else None
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   509
        """
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   510
        tr = self.current_workflow and self.current_workflow.transition_by_name(trname)
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   511
        if tr and tr.may_be_fired(self.eid):
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   512
            return tr
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   513
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   514
    @property
3405
9d31c9cb8103 nicer deprecation warnings
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3377
diff changeset
   515
    @deprecated('[3.5] use printable_state')
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   516
    def displayable_state(self):
3406
e343f37f7013 use self._cw instead of self.req
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3405
diff changeset
   517
        return self._cw._(self.state)
2920
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   518
64322aa83a1d start a new workflow engine
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2917
diff changeset
   519
MI_REL_TRIGGERS[('in_state', 'subject')] = WorkflowableMixIn