[CWEP002] introduce RQLRelationRewriter
Refactor existing RQLRewriter for later reuse of rewriting relation as specified
by CWEP002. Work is different because we simply want to replace a relation by
another rql snippet and we don't have to bother with EXISTS, subqueries and all.
This rewriter is not yet plugged into the querier.
Depends on yams 0.40 API.
Related to #3546717
# copyright 2003-2014 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
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# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
from yams.buildobjs import (EntityType, RelationDefinition, String, SubjectRelation,
ComputedRelation, Int)
from cubicweb.schema import ERQLExpression
class Person(EntityType):
name = String()
class Affaire(EntityType):
__permissions__ = {
'read': ('managers',
ERQLExpression('X owned_by U'), ERQLExpression('X concerne S?, S owned_by U')),
'add': ('managers', ERQLExpression('X concerne S, S owned_by U')),
'update': ('managers', 'owners', ERQLExpression('X in_state S, S name in ("pitetre", "en cours")')),
'delete': ('managers', 'owners', ERQLExpression('X concerne S, S owned_by U')),
}
ref = String(fulltextindexed=True, indexed=True, maxsize=16)
documented_by = SubjectRelation('Card', cardinality='1*')
concerne = SubjectRelation(('Societe', 'Note'), cardinality='1*')
class Societe(EntityType):
__permissions__ = {
'read': ('managers', 'users', 'guests'),
'update': ('managers', 'owners', ERQLExpression('U login L, X nom L')),
'delete': ('managers', 'owners', ERQLExpression('U login L, X nom L')),
'add': ('managers', 'users',)
}
nom = String()
class Division(Societe):
__specializes_schema__ = True
class Note(EntityType):
pass
class require_permission(RelationDefinition):
subject = ('Card', 'Note')
object = 'CWPermission'
class require_state(RelationDefinition):
subject = 'CWPermission'
object = 'State'
class inlined_card(RelationDefinition):
subject = 'Affaire'
object = 'Card'
inlined = True
cardinality = '?*'
class inlined_note(RelationDefinition):
subject = 'Card'
object = 'Note'
inlined = True
cardinality = '?*'
class inlined_affaire(RelationDefinition):
subject = 'Note'
object = 'Affaire'
inlined = True
cardinality = '?*'
class responsable(RelationDefinition):
subject = 'Societe'
object = 'CWUser'
inlined = True
cardinality = '1*'
class Contribution(EntityType):
code = Int()
class ArtWork(EntityType):
name = String()
class Role(EntityType):
name = String()
class contributor(RelationDefinition):
subject = 'Contribution'
object = 'Person'
cardinality = '1*'
inlined = True
class manifestation(RelationDefinition):
subject = 'Contribution'
object = 'ArtWork'
class role(RelationDefinition):
subject = 'Contribution'
object = 'Role'
class illustrator_of(ComputedRelation):
rule = ('C is Contribution, C contributor S, C manifestation O, '
'C role R, R name "illustrator"')
class participated_in(ComputedRelation):
rule = 'S contributor O'
class match(RelationDefinition):
subject = 'ArtWork'
object = 'Note'