author | Julien Cristau <julien.cristau@logilab.fr> |
Fri, 20 Feb 2015 16:17:51 +0100 | |
changeset 10317 | b81adb5e32f9 |
parent 9615 | 6ba726dbf4fd |
child 10666 | 7f6b5f023884 |
permissions | -rw-r--r-- |
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# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved. |
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr |
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# |
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# This file is part of CubicWeb. |
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# |
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# CubicWeb is free software: you can redistribute it and/or modify it under the |
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# terms of the GNU Lesser General Public License as published by the Free |
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# Software Foundation, either version 2.1 of the License, or (at your option) |
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# any later version. |
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# |
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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# details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License along |
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# with CubicWeb. If not, see <http://www.gnu.org/licenses/>. |
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"""Core hooks: workflow related hooks""" |
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__docformat__ = "restructuredtext en" |
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_ = unicode |
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from datetime import datetime |
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[form] put qualified name on validation error, should fix #784299
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from cubicweb import RepositoryError, validation_error |
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from cubicweb.predicates import is_instance, adaptable |
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from cubicweb.server import hook |
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def _change_state(cnx, x, oldstate, newstate): |
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nocheck = cnx.transaction_data.setdefault('skip-security', set()) |
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nocheck.add((x, 'in_state', oldstate)) |
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nocheck.add((x, 'in_state', newstate)) |
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# delete previous state first |
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cnx.delete_relation(x, 'in_state', oldstate) |
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cnx.add_relation(x, 'in_state', newstate) |
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# operations ################################################################### |
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class _SetInitialStateOp(hook.Operation): |
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"""make initial state be a default state""" |
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entity = None # make pylint happy |
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def precommit_event(self): |
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cnx = self.cnx |
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entity = self.entity |
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iworkflowable = entity.cw_adapt_to('IWorkflowable') |
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# if there is an initial state and the entity's state is not set, |
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# use the initial state as a default state |
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if not (cnx.deleted_in_transaction(entity.eid) or entity.in_state) \ |
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and iworkflowable.current_workflow: |
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state = iworkflowable.current_workflow.initial |
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if state: |
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cnx.add_relation(entity.eid, 'in_state', state.eid) |
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_FireAutotransitionOp(cnx, entity=entity) |
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class _FireAutotransitionOp(hook.Operation): |
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"""try to fire auto transition after state changes""" |
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entity = None # make pylint happy |
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def precommit_event(self): |
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entity = self.entity |
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iworkflowable = entity.cw_adapt_to('IWorkflowable') |
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autotrs = list(iworkflowable.possible_transitions('auto')) |
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if autotrs: |
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assert len(autotrs) == 1 |
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iworkflowable.fire_transition(autotrs[0]) |
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class _WorkflowChangedOp(hook.Operation): |
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"""fix entity current state when changing its workflow""" |
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eid = wfeid = None # make pylint happy |
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def precommit_event(self): |
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# notice that enforcement that new workflow apply to the entity's type is |
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# done by schema rule, no need to check it here |
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cnx = self.cnx |
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pendingeids = cnx.transaction_data.get('pendingeids', ()) |
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if self.eid in pendingeids: |
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return |
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entity = cnx.entity_from_eid(self.eid) |
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iworkflowable = entity.cw_adapt_to('IWorkflowable') |
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# check custom workflow has not been rechanged to another one in the same |
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# transaction |
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mainwf = iworkflowable.main_workflow |
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if mainwf.eid == self.wfeid: |
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deststate = mainwf.initial |
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if not deststate: |
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msg = _('workflow has no initial state') |
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raise validation_error(entity, {('custom_workflow', 'subject'): msg}) |
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if mainwf.state_by_eid(iworkflowable.current_state.eid): |
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# nothing to do |
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95 |
return |
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96 |
# if there are no history, simply go to new workflow's initial state |
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97 |
if not iworkflowable.workflow_history: |
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98 |
if iworkflowable.current_state.eid != deststate.eid: |
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99 |
_change_state(cnx, entity.eid, |
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100 |
iworkflowable.current_state.eid, deststate.eid) |
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101 |
_FireAutotransitionOp(cnx, entity=entity) |
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102 |
return |
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103 |
msg = cnx._('workflow changed to "%s"') |
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104 |
msg %= cnx._(mainwf.name) |
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105 |
cnx.transaction_data[(entity.eid, 'customwf')] = self.wfeid |
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106 |
iworkflowable.change_state(deststate, msg, u'text/plain') |
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107 |
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108 |
|
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109 |
class _CheckTrExitPoint(hook.Operation): |
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treid = None # make pylint happy |
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111 |
|
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112 |
def precommit_event(self): |
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113 |
tr = self.cnx.entity_from_eid(self.treid) |
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114 |
outputs = set() |
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115 |
for ep in tr.subworkflow_exit: |
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116 |
if ep.subwf_state.eid in outputs: |
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msg = _("can't have multiple exits on the same state") |
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raise validation_error(self.treid, {('subworkflow_exit', 'subject'): msg}) |
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119 |
outputs.add(ep.subwf_state.eid) |
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120 |
|
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121 |
|
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class _SubWorkflowExitOp(hook.Operation): |
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123 |
forentity = trinfo = None # make pylint happy |
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124 |
|
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125 |
def precommit_event(self): |
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126 |
cnx = self.cnx |
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forentity = self.forentity |
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128 |
iworkflowable = forentity.cw_adapt_to('IWorkflowable') |
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129 |
trinfo = self.trinfo |
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130 |
# we're in a subworkflow, check if we've reached an exit point |
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131 |
wftr = iworkflowable.subworkflow_input_transition() |
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132 |
if wftr is None: |
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133 |
# inconsistency detected |
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134 |
msg = _("state doesn't belong to entity's current workflow") |
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135 |
raise validation_error(self.trinfo, {('to_state', 'subject'): msg}) |
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136 |
tostate = wftr.get_exit_point(forentity, trinfo.cw_attr_cache['to_state']) |
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137 |
if tostate is not None: |
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138 |
# reached an exit point |
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139 |
msg = _('exiting from subworkflow %s') |
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140 |
msg %= cnx._(iworkflowable.current_workflow.name) |
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141 |
cnx.transaction_data[(forentity.eid, 'subwfentrytr')] = True |
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142 |
iworkflowable.change_state(tostate, msg, u'text/plain', tr=wftr) |
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143 |
|
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144 |
|
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145 |
# hooks ######################################################################## |
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146 |
|
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147 |
class WorkflowHook(hook.Hook): |
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148 |
__abstract__ = True |
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149 |
category = 'metadata' |
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150 |
|
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151 |
|
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152 |
class SetInitialStateHook(WorkflowHook): |
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153 |
__regid__ = 'wfsetinitial' |
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154 |
__select__ = WorkflowHook.__select__ & adaptable('IWorkflowable') |
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155 |
events = ('after_add_entity',) |
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156 |
|
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157 |
def __call__(self): |
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158 |
_SetInitialStateOp(self._cw, entity=self.entity) |
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159 |
|
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160 |
|
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161 |
class FireTransitionHook(WorkflowHook): |
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162 |
"""check the transition is allowed and add missing information into the |
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163 |
TrInfo entity. |
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164 |
|
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165 |
Expect that: |
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166 |
* wf_info_for inlined relation is set |
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167 |
* by_transition or to_state (managers only) inlined relation is set |
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168 |
|
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169 |
Check for automatic transition to be fired at the end |
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170 |
""" |
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171 |
__regid__ = 'wffiretransition' |
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172 |
__select__ = WorkflowHook.__select__ & is_instance('TrInfo') |
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173 |
events = ('before_add_entity',) |
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174 |
|
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175 |
def __call__(self): |
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176 |
cnx = self._cw |
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177 |
entity = self.entity |
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178 |
# first retreive entity to which the state change apply |
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179 |
try: |
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180 |
foreid = entity.cw_attr_cache['wf_info_for'] |
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181 |
except KeyError: |
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182 |
msg = _('mandatory relation') |
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183 |
raise validation_error(entity, {('wf_info_for', 'subject'): msg}) |
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184 |
forentity = cnx.entity_from_eid(foreid) |
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185 |
# see comment in the TrInfo entity definition |
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186 |
entity.cw_edited['tr_count']=len(forentity.reverse_wf_info_for) |
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187 |
iworkflowable = forentity.cw_adapt_to('IWorkflowable') |
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188 |
# then check it has a workflow set, unless we're in the process of changing |
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189 |
# entity's workflow |
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190 |
if cnx.transaction_data.get((forentity.eid, 'customwf')): |
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191 |
wfeid = cnx.transaction_data[(forentity.eid, 'customwf')] |
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192 |
wf = cnx.entity_from_eid(wfeid) |
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193 |
else: |
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194 |
wf = iworkflowable.current_workflow |
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195 |
if wf is None: |
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196 |
msg = _('related entity has no workflow set') |
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197 |
raise validation_error(entity, {None: msg}) |
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198 |
# then check it has a state set |
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199 |
fromstate = iworkflowable.current_state |
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200 |
if fromstate is None: |
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201 |
msg = _('related entity has no state') |
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202 |
raise validation_error(entity, {None: msg}) |
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203 |
# True if we are coming back from subworkflow |
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204 |
swtr = cnx.transaction_data.pop((forentity.eid, 'subwfentrytr'), None) |
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205 |
cowpowers = (cnx.user.is_in_group('managers') |
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206 |
or not cnx.write_security) |
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207 |
# no investigate the requested state change... |
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|
208 |
try: |
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209 |
treid = entity.cw_attr_cache['by_transition'] |
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|
210 |
except KeyError: |
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211 |
# no transition set, check user is a manager and destination state |
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212 |
# is specified (and valid) |
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213 |
if not cowpowers: |
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214 |
msg = _('mandatory relation') |
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215 |
raise validation_error(entity, {('by_transition', 'subject'): msg}) |
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216 |
deststateeid = entity.cw_attr_cache.get('to_state') |
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|
217 |
if not deststateeid: |
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218 |
msg = _('mandatory relation') |
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219 |
raise validation_error(entity, {('by_transition', 'subject'): msg}) |
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|
220 |
deststate = wf.state_by_eid(deststateeid) |
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|
221 |
if deststate is None: |
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|
222 |
msg = _("state doesn't belong to entity's workflow") |
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|
223 |
raise validation_error(entity, {('to_state', 'subject'): msg}) |
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|
224 |
else: |
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225 |
# check transition is valid and allowed, unless we're coming back |
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|
226 |
# from subworkflow |
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227 |
tr = cnx.entity_from_eid(treid) |
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|
228 |
if swtr is None: |
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|
229 |
qname = ('by_transition', 'subject') |
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|
230 |
if tr is None: |
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|
231 |
msg = _("transition doesn't belong to entity's workflow") |
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232 |
raise validation_error(entity, {qname: msg}) |
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233 |
if not tr.has_input_state(fromstate): |
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234 |
msg = _("transition %(tr)s isn't allowed from %(st)s") |
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235 |
raise validation_error(entity, {qname: msg}, { |
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|
236 |
'tr': tr.name, 'st': fromstate.name}, ['tr', 'st']) |
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|
237 |
if not tr.may_be_fired(foreid): |
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238 |
msg = _("transition may not be fired") |
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239 |
raise validation_error(entity, {qname: msg}) |
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240 |
deststateeid = entity.cw_attr_cache.get('to_state') |
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241 |
if deststateeid is not None: |
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242 |
if not cowpowers and deststateeid != tr.destination(forentity).eid: |
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243 |
msg = _("transition isn't allowed") |
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244 |
raise validation_error(entity, {('by_transition', 'subject'): msg}) |
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|
245 |
if swtr is None: |
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246 |
deststate = cnx.entity_from_eid(deststateeid) |
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247 |
if not cowpowers and deststate is None: |
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|
248 |
msg = _("state doesn't belong to entity's workflow") |
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|
249 |
raise validation_error(entity, {('to_state', 'subject'): msg}) |
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250 |
else: |
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251 |
deststateeid = tr.destination(forentity).eid |
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252 |
# everything is ok, add missing information on the trinfo entity |
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|
253 |
entity.cw_edited['from_state'] = fromstate.eid |
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|
254 |
entity.cw_edited['to_state'] = deststateeid |
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|
255 |
nocheck = cnx.transaction_data.setdefault('skip-security', set()) |
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|
256 |
nocheck.add((entity.eid, 'from_state', fromstate.eid)) |
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|
257 |
nocheck.add((entity.eid, 'to_state', deststateeid)) |
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|
258 |
_FireAutotransitionOp(cnx, entity=forentity) |
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|
259 |
|
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|
260 |
|
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|
261 |
class FiredTransitionHook(WorkflowHook): |
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262 |
"""change related entity state and handle exit of subworkflow""" |
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[appobjects] use __regid__ instead of __id__, more explicit
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|
263 |
__regid__ = 'wffiretransition' |
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[selectors] provide a new, optimized, is_instance selector that should at some point replace implements (along with the adaptable selector)
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|
264 |
__select__ = WorkflowHook.__select__ & is_instance('TrInfo') |
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|
265 |
events = ('after_add_entity',) |
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|
266 |
|
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|
267 |
def __call__(self): |
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|
268 |
trinfo = self.entity |
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|
269 |
rcache = trinfo.cw_attr_cache |
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|
270 |
_change_state(self._cw, rcache['wf_info_for'], rcache['from_state'], |
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|
271 |
rcache['to_state']) |
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272 |
forentity = self._cw.entity_from_eid(rcache['wf_info_for']) |
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273 |
iworkflowable = forentity.cw_adapt_to('IWorkflowable') |
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|
274 |
assert iworkflowable.current_state.eid == rcache['to_state'] |
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|
275 |
if iworkflowable.main_workflow.eid != iworkflowable.current_workflow.eid: |
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276 |
_SubWorkflowExitOp(self._cw, forentity=forentity, trinfo=trinfo) |
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|
277 |
|
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|
278 |
|
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|
279 |
class CheckInStateChangeAllowed(WorkflowHook): |
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[repo] enhanced security handling: deprecates unsafe_execute, in favor of explicit read/write security control using the `enabled_security` context manager. Also code executed on the repository side is now unsafe by default.
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|
280 |
"""check state apply, in case of direct in_state change using unsafe execute |
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""" |
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__regid__ = 'wfcheckinstate' |
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283 |
__select__ = WorkflowHook.__select__ & hook.match_rtype('in_state') |
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events = ('before_add_relation',) |
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285 |
category = 'integrity' |
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286 |
|
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287 |
def __call__(self): |
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cnx = self._cw |
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nocheck = cnx.transaction_data.get('skip-security', ()) |
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if (self.eidfrom, 'in_state', self.eidto) in nocheck: |
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291 |
# state changed through TrInfo insertion, so we already know it's ok |
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292 |
return |
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entity = cnx.entity_from_eid(self.eidfrom) |
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iworkflowable = entity.cw_adapt_to('IWorkflowable') |
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mainwf = iworkflowable.main_workflow |
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if mainwf is None: |
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msg = _('entity has no workflow set') |
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raise validation_error(entity, {None: msg}) |
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299 |
for wf in mainwf.iter_workflows(): |
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if wf.state_by_eid(self.eidto): |
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301 |
break |
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302 |
else: |
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msg = _("state doesn't belong to entity's workflow. You may " |
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304 |
"want to set a custom workflow for this entity first.") |
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raise validation_error(self.eidfrom, {('in_state', 'subject'): msg}) |
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if iworkflowable.current_workflow and wf.eid != iworkflowable.current_workflow.eid: |
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msg = _("state doesn't belong to entity's current workflow") |
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raise validation_error(self.eidfrom, {('in_state', 'subject'): msg}) |
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309 |
|
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|
310 |
|
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311 |
class SetModificationDateOnStateChange(WorkflowHook): |
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"""update entity's modification date after changing its state""" |
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313 |
__regid__ = 'wfsyncmdate' |
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__select__ = WorkflowHook.__select__ & hook.match_rtype('in_state') |
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315 |
events = ('after_add_relation',) |
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|
316 |
|
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317 |
def __call__(self): |
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318 |
if self._cw.added_in_transaction(self.eidfrom): |
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319 |
# new entity, not needed |
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320 |
return |
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entity = self._cw.entity_from_eid(self.eidfrom) |
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322 |
try: |
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323 |
entity.cw_set(modification_date=datetime.now()) |
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324 |
except RepositoryError as ex: |
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325 |
# usually occurs if entity is coming from a read-only source |
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326 |
# (eg ldap user) |
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self.warning('cant change modification date for %s: %s', entity, ex) |
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328 |
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329 |
|
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330 |
class CheckWorkflowTransitionExitPoint(WorkflowHook): |
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331 |
"""check that there is no multiple exits from the same state""" |
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332 |
__regid__ = 'wfcheckwftrexit' |
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333 |
__select__ = WorkflowHook.__select__ & hook.match_rtype('subworkflow_exit') |
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334 |
events = ('after_add_relation',) |
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335 |
|
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336 |
def __call__(self): |
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337 |
_CheckTrExitPoint(self._cw, treid=self.eidfrom) |
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|
338 |
|
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339 |
|
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340 |
class SetCustomWorkflow(WorkflowHook): |
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341 |
__regid__ = 'wfsetcustom' |
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342 |
__select__ = WorkflowHook.__select__ & hook.match_rtype('custom_workflow') |
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343 |
events = ('after_add_relation',) |
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|
344 |
|
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345 |
def __call__(self): |
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346 |
_WorkflowChangedOp(self._cw, eid=self.eidfrom, wfeid=self.eidto) |
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347 |
|
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348 |
|
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349 |
class DelCustomWorkflow(SetCustomWorkflow): |
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350 |
__regid__ = 'wfdelcustom' |
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351 |
events = ('after_delete_relation',) |
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352 |
|
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353 |
def __call__(self): |
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entity = self._cw.entity_from_eid(self.eidfrom) |
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typewf = entity.cw_adapt_to('IWorkflowable').cwetype_workflow() |
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356 |
if typewf is not None: |
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357 |
_WorkflowChangedOp(self._cw, eid=self.eidfrom, wfeid=typewf.eid) |
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358 |