fix optimisation with super session that may lead to integrity loss
at some point I've decided to stop ensuring ?1 cardinality was respected
when adding a new relation using a super session, to avoid the cost of
the delete query. That was yet discussable because it introduced unexpected
difference between execute and unsafe_execute, which is imo not worth it.
Also, now that rql() in migration script default to unsafe_execute, we
definitly don't want that implicit behaviour change (which already cause
bug when for instance adding another default workflow for an entity type:
without that fix we end up with *two* default workflows while the schema
tells we can have only one.
IMO we should go to the direction that super session skip all security
check, but nothing else, unless explicitly asked.
"""workflow views:
* IWorkflowable views and forms
* workflow entities views (State, Transition, TrInfo)
:organization: Logilab
:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
__docformat__ = "restructuredtext en"
_ = unicode
from logilab.mtconverter import xml_escape
from logilab.common.graph import escape, GraphGenerator, DotBackend
from cubicweb import Unauthorized, view
from cubicweb.selectors import (implements, has_related_entities, one_line_rset,
relation_possible, match_form_params,
implements, score_entity)
from cubicweb.interfaces import IWorkflowable
from cubicweb.view import EntityView
from cubicweb.schema import display_name
from cubicweb.web import uicfg, stdmsgs, action, component, form, action
from cubicweb.web import formfields as ff, formwidgets as fwdgs
from cubicweb.web.views import TmpFileViewMixin, forms, primary, autoform
_pvs = uicfg.primaryview_section
_pvs.tag_subject_of(('Workflow', 'initial_state', '*'), 'hidden')
_pvs.tag_object_of(('*', 'state_of', 'Workflow'), 'hidden')
_pvs.tag_object_of(('*', 'transition_of', 'Workflow'), 'hidden')
_abaa = uicfg.actionbox_appearsin_addmenu
_abaa.tag_subject_of(('BaseTransition', 'condition', 'RQLExpression'), False)
_abaa.tag_subject_of(('State', 'allowed_transition', 'BaseTransition'), False)
_abaa.tag_object_of(('SubWorkflowExitPoint', 'destination_state', 'State'),
False)
_abaa.tag_object_of(('State', 'state_of', 'Workflow'), True)
_abaa.tag_object_of(('Transition', 'transition_of', 'Workflow'), True)
_abaa.tag_object_of(('WorkflowTransition', 'transition_of', 'Workflow'), True)
_afs = uicfg.autoform_section
_afs.tag_subject_of(('TrInfo', 'to_state', '*'), 'main', 'hidden')
_afs.tag_subject_of(('TrInfo', 'from_state', '*'), 'main', 'hidden')
_afs.tag_object_of(('State', 'allowed_transition', '*'), 'main', 'attributes')
# IWorkflowable views #########################################################
class ChangeStateForm(forms.CompositeEntityForm):
__regid__ = 'changestate'
form_renderer_id = 'base' # don't want EntityFormRenderer
form_buttons = [fwdgs.SubmitButton(),
fwdgs.Button(stdmsgs.BUTTON_CANCEL, cwaction='cancel')]
class ChangeStateFormView(form.FormViewMixIn, view.EntityView):
__regid__ = 'statuschange'
title = _('status change')
__select__ = (one_line_rset() & implements(IWorkflowable)
& match_form_params('treid'))
def cell_call(self, row, col):
entity = self.cw_rset.get_entity(row, col)
transition = self._cw.entity_from_eid(self._cw.form['treid'])
form = self.get_form(entity, transition)
self.w(u'<h4>%s %s</h4>\n' % (self._cw._(transition.name),
entity.view('oneline')))
msg = self.req._('status will change from %(st1)s to %(st2)s') % {
'st1': entity.printable_state,
'st2': self._cw._(transition.destination().name)}
self.w(u'<p>%s</p>\n' % msg)
self.w(form.render())
def redirectpath(self, entity):
return entity.rest_path()
def get_form(self, entity, transition, **kwargs):
# XXX used to specify both rset/row/col and entity in case implements
# selector (and not implements) is used on custom form
form = self._cw.vreg['forms'].select(
'changestate', self._cw, entity=entity, transition=transition,
redirect_path=self.redirectpath(entity), **kwargs)
trinfo = self._cw.vreg['etypes'].etype_class('TrInfo')(self._cw)
trinfo.eid = self._cw.varmaker.next()
subform = self._cw.vreg['forms'].select('edition', self._cw, entity=trinfo,
mainform=False)
subform.field_by_name('wf_info_for', 'subject').value = entity.eid
trfield = subform.field_by_name('by_transition', 'subject')
trfield.widget = fwdgs.HiddenInput()
trfield.value = transition.eid
form.add_subform(subform)
return form
class WFHistoryView(EntityView):
__regid__ = 'wfhistory'
__select__ = relation_possible('wf_info_for', role='object') & \
score_entity(lambda x: x.workflow_history)
title = _('Workflow history')
def cell_call(self, row, col, view=None):
_ = self._cw._
eid = self.cw_rset[row][col]
sel = 'Any FS,TS,WF,D'
rql = ' ORDERBY D DESC WHERE WF wf_info_for X,'\
'WF from_state FS, WF to_state TS, WF comment C,'\
'WF creation_date D'
if self._cw.vreg.schema.eschema('CWUser').has_perm(self._cw, 'read'):
sel += ',U,C'
rql += ', WF owned_by U?'
displaycols = range(5)
headers = (_('from_state'), _('to_state'), _('comment'), _('date'),
_('CWUser'))
else:
sel += ',C'
displaycols = range(4)
headers = (_('from_state'), _('to_state'), _('comment'), _('date'))
rql = '%s %s, X eid %%(x)s' % (sel, rql)
try:
rset = self._cw.execute(rql, {'x': eid}, 'x')
except Unauthorized:
return
if rset:
self.wview('table', rset, title=_(self.title), displayactions=False,
displaycols=displaycols, headers=headers)
class WFHistoryVComponent(component.EntityVComponent):
"""display the workflow history for entities supporting it"""
__regid__ = 'wfhistory'
__select__ = WFHistoryView.__select__ & component.EntityVComponent.__select__
context = 'navcontentbottom'
title = _('Workflow history')
def cell_call(self, row, col, view=None):
self.wview('wfhistory', self.cw_rset, row=row, col=col, view=view)
# workflow actions #############################################################
class WorkflowActions(action.Action):
"""fill 'workflow' sub-menu of the actions box"""
__regid__ = 'workflow'
__select__ = (action.Action.__select__ & one_line_rset() &
relation_possible('in_state'))
submenu = _('workflow')
order = 10
def fill_menu(self, box, menu):
entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
menu.label = u'%s: %s' % (self._cw._('state'), entity.printable_state)
menu.append_anyway = True
super(WorkflowActions, self).fill_menu(box, menu)
def actual_actions(self):
entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
hastr = False
for tr in entity.possible_transitions():
url = entity.absolute_url(vid='statuschange', treid=tr.eid)
yield self.build_action(self._cw._(tr.name), url)
hastr = True
# don't propose to see wf if user can't pass any transition
if hastr:
wfurl = entity.current_workflow.absolute_url()
yield self.build_action(self._cw._('view workflow'), wfurl)
if entity.workflow_history:
wfurl = entity.absolute_url(vid='wfhistory')
yield self.build_action(self._cw._('view history'), wfurl)
# workflow entity types views ##################################################
_pvs = uicfg.primaryview_section
_pvs.tag_subject_of(('Workflow', 'initial_state', '*'), 'hidden')
_pvs.tag_object_of(('*', 'state_of', 'Workflow'), 'hidden')
_pvs.tag_object_of(('*', 'transition_of', 'Workflow'), 'hidden')
_abaa = uicfg.actionbox_appearsin_addmenu
_abaa.tag_subject_of(('BaseTransition', 'condition', 'RQLExpression'), False)
_abaa.tag_subject_of(('State', 'allowed_transition', 'BaseTransition'), False)
_abaa.tag_object_of(('SubWorkflowExitPoint', 'destination_state', 'State'),
False)
_abaa.tag_object_of(('State', 'state_of', 'Workflow'), True)
_abaa.tag_object_of(('BaseTransition', 'transition_of', 'Workflow'), False)
_abaa.tag_object_of(('Transition', 'transition_of', 'Workflow'), True)
_abaa.tag_object_of(('WorkflowTransition', 'transition_of', 'Workflow'), True)
class WorkflowPrimaryView(primary.PrimaryView):
__select__ = implements('Workflow')
def render_entity_attributes(self, entity):
self.w(entity.view('reledit', rtype='description'))
self.w(u'<img src="%s" alt="%s"/>' % (
xml_escape(entity.absolute_url(vid='wfgraph')),
xml_escape(self._cw._('graphical workflow for %s') % entity.name)))
class CellView(view.EntityView):
__regid__ = 'cell'
__select__ = implements('TrInfo')
def cell_call(self, row, col, cellvid=None):
self.w(self.cw_rset.get_entity(row, col).view('reledit', rtype='comment'))
class StateInContextView(view.EntityView):
"""convenience trick, State's incontext view should not be clickable"""
__regid__ = 'incontext'
__select__ = implements('State')
def cell_call(self, row, col):
self.w(xml_escape(self._cw.view('textincontext', self.cw_rset,
row=row, col=col)))
# workflow entity types edition ################################################
_afs = uicfg.autoform_section
_afs.tag_subject_of(('TrInfo', 'to_state', '*'), 'main', 'hidden')
_afs.tag_subject_of(('TrInfo', 'from_state', '*'), 'main', 'hidden')
_afs.tag_object_of(('State', 'allowed_transition', '*'), 'main', 'attributes')
_afs.tag_subject_of(('State', 'allowed_transition', '*'), 'main', 'attributes')
def workflow_items_for_relation(req, wfeid, wfrelation, targetrelation):
wf = req.entity_from_eid(wfeid)
rschema = req.vreg.schema[targetrelation]
return sorted((e.view('combobox'), e.eid)
for e in getattr(wf, 'reverse_%s' % wfrelation)
if rschema.has_perm(req, 'add', toeid=e.eid))
class TransitionEditionForm(autoform.AutomaticEntityForm):
__select__ = implements('Transition')
def workflow_states_for_relation(self, targetrelation):
eids = self.edited_entity.linked_to('transition_of', 'subject')
if eids:
return workflow_items_for_relation(self._cw, eids[0], 'state_of',
targetrelation)
return []
def subject_destination_state_vocabulary(self, rtype, limit=None):
if not self.edited_entity.has_eid():
return self.workflow_states_for_relation('destination_state')
return self.subject_relation_vocabulary(rtype, limit)
def object_allowed_transition_vocabulary(self, rtype, limit=None):
if not self.edited_entity.has_eid():
return self.workflow_states_for_relation('allowed_transition')
return self.object_relation_vocabulary(rtype, limit)
class StateEditionForm(autoform.AutomaticEntityForm):
__select__ = implements('State')
def subject_allowed_transition_vocabulary(self, rtype, limit=None):
if not self.edited_entity.has_eid():
eids = self.edited_entity.linked_to('state_of', 'subject')
if eids:
return workflow_items_for_relation(self._cw, eids[0], 'transition_of',
'allowed_transition')
return []
# workflow images ##############################################################
class WorkflowDotPropsHandler(object):
def __init__(self, req):
self._ = req._
def node_properties(self, stateortransition):
"""return default DOT drawing options for a state or transition"""
props = {'label': stateortransition.printable_value('name'),
'fontname': 'Courier'}
if hasattr(stateortransition, 'state_of'):
props['shape'] = 'box'
props['style'] = 'filled'
if stateortransition.reverse_initial_state:
props['color'] = '#88CC88'
else:
props['shape'] = 'ellipse'
descr = []
tr = stateortransition
if tr.require_group:
descr.append('%s %s'% (
self._('groups:'),
','.join(g.printable_value('name') for g in tr.require_group)))
if tr.condition:
descr.append('%s %s'% (
self._('condition:'),
' | '.join(e.expression for e in tr.condition)))
if descr:
props['label'] += escape('\n'.join(descr))
return props
def edge_properties(self, transition, fromstate, tostate):
return {'label': '', 'dir': 'forward',
'color': 'black', 'style': 'filled'}
class WorkflowVisitor:
def __init__(self, entity):
self.entity = entity
def nodes(self):
for state in self.entity.reverse_state_of:
state.complete()
yield state.eid, state
for transition in self.entity.reverse_transition_of:
transition.complete()
yield transition.eid, transition
def edges(self):
for transition in self.entity.reverse_transition_of:
for incomingstate in transition.reverse_allowed_transition:
yield incomingstate.eid, transition.eid, transition
yield transition.eid, transition.destination().eid, transition
class WorkflowImageView(TmpFileViewMixin, view.EntityView):
__regid__ = 'wfgraph'
__select__ = implements('Workflow')
content_type = 'image/png'
def _generate(self, tmpfile):
"""display schema information for an entity"""
entity = self.cw_rset.get_entity(self.cw_row, self.cw_col)
visitor = WorkflowVisitor(entity)
prophdlr = WorkflowDotPropsHandler(self._cw)
generator = GraphGenerator(DotBackend('workflow', 'LR',
ratio='compress', size='30,12'))
return generator.generate(visitor, prophdlr, tmpfile)