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##############################################################################
#
# Copyright (c) 2002 Nexedi SARL and Contributors. All Rights Reserved.
# Jean-Paul Smets-Solanes <jp@nexedi.com>
#
# WARNING: This program as such is intended to be used by professional
# programmers who take the whole responsability of assessing all potential
# consequences resulting from its eventual inadequacies and bugs
# End users who are looking for a ready-to-use solution with commercial
# garantees and support are strongly adviced to contract a Free Software
# Service Company
#
# 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 the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
##############################################################################
from Products.CMFCategory.Category import Category as CMFCategory
from AccessControl import ClassSecurityInfo
from Products.ERP5.Document.MetaNode import MetaNode
from Products.ERP5.Document.MetaResource import MetaResource
from Products.ERP5Type import Interface, Permissions, PropertySheet
from Products.ERP5Type.Base import Base
from Products.ERP5.Document.Predicate import Predicate
from zLOG import LOG
class Category(CMFCategory, Predicate, MetaNode, MetaResource):
"""
Category objects allow to define classification categories
in an ERP5 portal. For example, a document may be assigned a color
attribute (red, blue, green). Rather than assigning an attribute
with a pop-up menu (which is still a possibility), we can prefer
in certain cases to associate to the object a category. In this
example, the category will be named color/red, color/blue or color/green
Categories can include subcategories. For example, a region category can
define
region/europe
region/europe/west/
region/europe/west/france
region/europe/west/germany
region/europe/south/spain
region/americas
region/americas/north
region/americas/north/us
region/americas/south
region/asia
In this example the base category is 'region'.
Categories are meant to be indexed with the ZSQLCatalog (and thus
a unique UID will be automatically generated each time a category is
indexed).
Categories allow define sets and subsets of objects and can be used
for many applications :
- association of a document to a URL
- description of organisations (geographical, professional)
Through acquisition, it is possible to create 'virtual' classifications based
on existing documents or categories. For example, if there is a document at
the URL
organisation/nexedi
and there exists a base category 'client', then the portal_categories tool
will allow to create a virtual category
client/organisation/nexedi
Virtual categories allow not to duplicate information while providing
a representation power equivalent to RDF or relational databases.
Categories are implemented as a subclass of BTreeFolders
NEW: categories should also be able to act as a domain. We should add
a Domain interface to categories so that we do not need to regenerate
report trees for categories.
"""
meta_type='ERP5 Category'
portal_type='Category' # may be useful in the future...
isPortalContent = 1
isRADContent = 1
isCategory = 1
allowed_types = ('ERP5 Category', )
# Declarative security
security = ClassSecurityInfo()
security.declareProtected(Permissions.ManagePortal,
'manage_editProperties',
'manage_changeProperties',
'manage_propertiesForm',
)
property_sheets = ( PropertySheet.Base
, PropertySheet.SimpleItem
, PropertySheet.CategoryCore
, PropertySheet.Codification
, PropertySheet.Reference
, PropertySheet.SortIndex)
# Inheritance
__init__ = Predicate.__init__
# Experimental - virtual document access
def _experimental_aq_dynamic(self, name):
result = Base._aq_dynamic(self, name)
if result is not None:
return result
# Do some optimisation here for names which can not be names of documents
if name.startswith('_') or name.startswith('portal_')\
or name.startswith('aq_') or name.startswith('selection_') \
or name.startswith('sort-') or name == 'getLayout' \
or name == 'getListItemUrl' or name.startswith('WebSite_'):
return None
# Use a non recursion variable
cache_key = 'web_site_aq_cache'
request = self.REQUEST
# Prevent infinite recursion
if not request.has_key(cache_key):
request[cache_key] = {}
elif request[cache_key].has_key(name):
return request[cache_key][name]
try:
result_list = self.portal_catalog(portal_type="Person", id = name)
if len(result_list):
return result_list[0].getObject()
except:
# Cleanup non recursion dict in case of exception
if request[cache_key].has_key(name):
del request[cache_key][name]
raise
return None
# Experimental - WebDAV browsing support - ask JPS
def experimental_listDAVObjects(self):
"""
"""
from zLOG import LOG
LOG("Category listDAVObjects" ,0, "listDAVObjects")
# XXX - We should try to use only Lazy Maps and to set a limit to the
# number of objects
# First show the subcategories
result = list(self.objectValues(spec=('ERP5 Category', 'ERP5 Base Category')))
# Then show the related documents
result.extend(self.portal_categories.getRelatedValueList(
self, self.getBaseCategory().getId(), portal_type="Person"))
return result