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tune relation registry: do not use predicate in catalog query, filter later

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This commit is contained in:
Helmut Merz 2013-02-06 10:23:55 +01:00
parent fae6a82df0
commit 872272adb3
2 changed files with 18 additions and 10 deletions
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9
relation/__init__.py
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@ -1,7 +1,7 @@
# -*- coding: UTF-8 -*-
# -*- Mode: Python; py-indent-offset: 4 -*-
#
# Copyright (c) 2005 Helmut Merz helmutm@cy55.de
# Copyright (c) 2013 Helmut Merz helmutm@cy55.de
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@ -21,8 +21,6 @@
"""
The relation package provides all you need for setting up dyadic and
triadic relations.
$Id$
"""
from persistent import Persistent
@ -37,11 +35,16 @@ class Relation(Persistent):
order = 0
relevance = 1.0
fallback = None
@classmethod
def getPredicateName(cls):
return '%s.%s' % (cls.__module__, cls.__name__)
@property
def ident(self):
return self.getPredicateName()
def validate(self, registry=None):
return True

19
relation/registry.py
View file

@ -1,5 +1,5 @@
#
# Copyright (c) 2009 Helmut Merz helmutm@cy55.de
# Copyright (c) 2013 Helmut Merz helmutm@cy55.de
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@ -18,8 +18,6 @@
"""
Implementation of the utilities needed for the relations package.
$Id$
"""
from logging import getLogger
@ -186,7 +184,7 @@ class RelationRegistry(Catalog):
if value is not None:
criteria[attr] = intids.getId(value)
pn = example.getPredicateName()
if pn:
if pn is not None:
criteria['relationship'] = pn
for k in kw:
# overwrite example fields with explicit values
@ -244,10 +242,17 @@ def getRelations(first=None, second=None, third=None, relationships=None):
if not relationships:
return registry.query(**query)
else:
result = set()
predicates = []
for r in relationships:
query['relationship'] = r
result.update(registry.query(**query))
if hasattr(r, 'predicate'):
predicates.append(r.predicate)
r.predicate = None
else:
predicates.append(r.getPredicateName())
result = registry.query(**query)
if predicates:
return [r for r in result
if r.ident in predicates or r.fallback in predicates]
return result
def getRelationSingle(obj=None, relationship=None, forSecond=True):