hooks/storages.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 27 Jan 2010 09:24:35 +0100
changeset 4385 820aa03f71ad
parent 4322 f65743cc53e4
child 4716 55b6a3262071
permissions -rw-r--r--
use field.vocabulary instead of field.choices, skip already related eids. Also consider vocabulary when no etype specified
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"""hooks to handle attributes mapped to a custom storage
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"""
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from os import unlink
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from cubicweb.server.hook import Hook
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from cubicweb.server.sources.storages import ETYPE_ATTR_STORAGE
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class BFSSHook(Hook):
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    """abstract class for bytes file-system storage hooks"""
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    __abstract__ = True
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    category = 'bfss'
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class PreAddEntityHook(BFSSHook):
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    """"""
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    __regid__ = 'bfss_add_entity'
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    events = ('before_add_entity', )
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    #__select__ = Hook.__select__ & implements('Repository')
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    def __call__(self):
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        for attr in ETYPE_ATTR_STORAGE.get(self.entity.__regid__, ()):
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            fpath = ETYPE_ATTR_STORAGE[self.entity.__regid__][attr].entity_added(self.entity, attr)
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            if fpath is not None:
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                AddFileOp(filepath=fpath)
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class PreUpdateEntityHook(BFSSHook):
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    """"""
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    __regid__ = 'bfss_update_entity'
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    events = ('before_update_entity', )
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    #__select__ = Hook.__select__ & implements('Repository')
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    def __call__(self):
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        for attr in ETYPE_ATTR_STORAGE.get(self.entity.__regid__, ()):
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            ETYPE_ATTR_STORAGE[self.entity.__regid__][attr].entity_updated(self.entity, attr)
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class PreDeleteEntityHook(BFSSHook):
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    """"""
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    __regid__ = 'bfss_delete_entity'
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    events = ('before_delete_entity', )
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    #__select__ = Hook.__select__ & implements('Repository')
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    def __call__(self):
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        for attr in ETYPE_ATTR_STORAGE.get(self.entity.__regid__, ()):
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            ETYPE_ATTR_STORAGE[self.entity.__regid__][attr].entity_deleted(self.entity, attr)