cubicweb/server/test/data-schema2sql/schema/State.py
author Denis Laxalde <denis.laxalde@logilab.fr>
Thu, 30 Nov 2017 11:55:35 +0100
changeset 12242 68ca7fe0ca29
parent 11057 0b59724cb3f2
permissions -rw-r--r--
[ssplanner] Prevent execution of write queries involving computed relations Previously, setting a computed relation upon entity creation or modification (using the ORM or an RQL query) would usually fail with an operational error in the backend ("no such table"). However, under some mysterious circumstances (like passing a string as value in cw_set for a computed relation), the RQL to SQL transformation would simply drop the clause. To prevent this to happen, we add a check for computed relation before adding a relation to an execution plan. This check raises a QueryError. It happens in several places: * in querier.InsertPlan.add_relation_def() (called from several places in ssplanner steps) for INSERT queries, * in ssplanner.UpdateStep.execute() for SET queries and, * in ssplanner.SSplanner.build_delete_plan() for DELETE queries. Tests added to unittest_querier.py because unittest_sslplanner.py looked inappropriate (it has only unit tests) and the former already had a NonRegressionTC class.
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# copyright 2004-2013 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 yams.
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#
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# yams 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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# yams is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# 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 yams. If not, see <http://www.gnu.org/licenses/>.
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from yams.buildobjs import (EntityType, RelationType, RelationDefinition,
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                            SubjectRelation, Int, String,  Boolean)
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from yams.constraints import SizeConstraint, UniqueConstraint
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from . import RESTRICTED_RTYPE_PERMS
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class State(EntityType):
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    """used to associate simple states to an entity
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    type and/or to define workflows
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    """
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    __permissions__ = {
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        'read':   ('managers', 'users', 'guests',),
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        'add':    ('managers', 'users',),
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        'delete': ('managers', 'owners',),
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        'update': ('managers', 'owners',),
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        }
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    # attributes
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    eid = Int(required=True, uid=True)
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    name = String(required=True,
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                  indexed=True, internationalizable=True,
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                  constraints=[SizeConstraint(256)])
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    description = String(fulltextindexed=True)
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    # relations
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    state_of = SubjectRelation('Eetype', cardinality='+*')
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    next_state = SubjectRelation('State', cardinality='**')
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class state_of(RelationType):
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    """link a state to one or more entity type"""
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    __permissions__ = RESTRICTED_RTYPE_PERMS
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class next_state(RelationType):
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    """define a workflow by associating a state to possible following states
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    """
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    __permissions__ = RESTRICTED_RTYPE_PERMS
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class initial_state(RelationType):
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    """indicate which state should be used by default when an entity using states
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    is created
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    """
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    __permissions__ = {
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        'read':   ('managers', 'users', 'guests',),
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        'add':    ('managers', 'users',),
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        'delete': ('managers', 'users',),
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        }
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    subject = 'Eetype'
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    object = 'State'
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    cardinality = '?*'
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    inlined = True
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class Eetype(EntityType):
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    """define an entity type, used to build the application schema"""
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    __permissions__ = {
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        'read':   ('managers', 'users', 'guests',),
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        'add':    ('managers',),
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        'delete': ('managers',),
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        'update': ('managers', 'owners',),
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        }
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    name = String(required=True, indexed=True, internationalizable=True,
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                  constraints=[UniqueConstraint(), SizeConstraint(64)])
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    description = String(fulltextindexed=True)
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    meta = Boolean()
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    final = Boolean()