362 lines
10 KiB
Python
362 lines
10 KiB
Python
##############################################################################
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#
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# Copyright (c) 2004-2006 TINY SPRL. (http://tiny.be) All Rights Reserved.
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# Fabien Pinckaers <fp@tiny.Be>
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#
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# WARNING: This program as such is intended to be used by professional
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# programmers who take the whole responsability of assessing all potential
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# consequences resulting from its eventual inadequacies and bugs
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# End users who are looking for a ready-to-use solution with commercial
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# garantees and support are strongly adviced to contract a Free Software
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# Service Company
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#
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# This program is Free Software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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##############################################################################
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#
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# OSV: Objects Services
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#
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import orm
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import netsvc
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import pooler
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import copy
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import psycopg
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module_list = []
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module_class_list = {}
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class_pool = {}
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class except_osv(Exception):
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def __init__(self, name, value, exc_type='warning'):
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self.name = name
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self.exc_type = exc_type
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self.value = value
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self.args = (exc_type,name)
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class osv_pool(netsvc.Service):
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def __init__(self):
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self.obj_pool = {}
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self.module_object_list = {}
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self.created = []
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self._sql_error = {}
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netsvc.Service.__init__(self, 'object_proxy', audience='')
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self.joinGroup('web-services')
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self.exportMethod(self.exportedMethods)
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self.exportMethod(self.obj_list)
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self.exportMethod(self.exec_workflow)
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self.exportMethod(self.execute)
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self.exportMethod(self.execute_cr)
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def execute_cr(self, cr, uid, obj, method, *args, **kw):
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#
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# TODO: check security level
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#
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try:
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if (not method in getattr(self.obj_pool[obj],'_protected')) and len(args) and args[0] and len(self.obj_pool[obj]._inherits):
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types = {obj: args[0]}
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cr.execute('select inst_type,inst_id,obj_id from inherit where obj_type=%s and obj_id in ('+','.join(map(str,args[0]))+')', (obj,))
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for ty,id,id2 in cr.fetchall():
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if not ty in types:
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types[ty]=[]
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types[ty].append(id)
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types[obj].remove(id2)
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for t,ids in types.items():
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if len(ids):
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t = self.obj_pool[t]
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res = getattr(t,method)(cr, uid, ids, *args[1:], **kw)
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else:
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obj = self.obj_pool[obj]
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res = getattr(obj,method)(cr, uid, *args, **kw)
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return res
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except orm.except_orm, inst:
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self.abortResponse(1, inst.value[0], inst.name, inst.value[1])
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except except_osv, inst:
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self.abortResponse(1, inst.name, inst.exc_type, inst.value)
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except psycopg.IntegrityError, inst:
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for key in self._sql_error.keys():
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if key in inst[0]:
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self.abortResponse(1, 'Constraint Error', 'warning', self._sql_error[key])
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self.abortResponse(1, 'Integrity Error', 'warning', inst[0])
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def execute(self, db, uid, obj, method, *args, **kw):
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cr = pooler.get_db(db).cursor()
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try:
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try:
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res = self.execute_cr(cr, uid, obj, method, *args, **kw)
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cr.commit()
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except Exception:
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cr.rollback()
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raise
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finally:
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cr.close()
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return res
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def exec_workflow_cr(self, cr, uid, obj, method, *args):
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wf_service = netsvc.LocalService("workflow")
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wf_service.trg_validate(uid, obj, args[0], method, cr)
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return True
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def exec_workflow(self, db, uid, obj, method, *args):
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cr = pooler.get_db(db).cursor()
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try:
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try:
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res = self.exec_workflow_cr(cr, uid, obj, method, *args)
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cr.commit()
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except Exception:
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cr.rollback()
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raise
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finally:
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cr.close()
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return res
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def obj_list(self):
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return self.obj_pool.keys()
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# adds a new object instance to the object pool.
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# if it already existed, the instance is replaced
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def add(self, name, obj_inst):
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if self.obj_pool.has_key(name):
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del self.obj_pool[name]
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self.obj_pool[name] = obj_inst
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module = str(obj_inst.__class__)[6:]
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module = module[:len(module)-1]
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module = module.split('.')[0][2:]
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self.module_object_list.setdefault(module, []).append(obj_inst)
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def get(self, name):
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obj = self.obj_pool.get(name, None)
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# We cannot uncomment this line because it breaks initialisation since objects do not initialize
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# in the correct order and the ORM doesnt support correctly when some objets do not exist yet
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# assert obj, "object %s does not exist !" % name
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return obj
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#TODO: pass a list of modules to load
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def instanciate(self, module):
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# print "module list:", module_list
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# for module in module_list:
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res = []
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class_list = module_class_list.get(module, [])
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# if module not in self.module_object_list:
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# print "%s class_list:" % module, class_list
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for klass in class_list:
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res.append(klass.createInstance(self, module))
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return res
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# else:
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# print "skipping module", module
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#pooler.get_pool(cr.dbname) = osv_pool()
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#
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# See if we can use the pool var instead of the class_pool one
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#
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class inheritor(type):
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def __new__(cls, name, bases, d):
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parent_name = d.get('_inherit', None)
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if parent_name:
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parent_class = class_pool.get(parent_name)
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assert parent_class, "parent class %s does not exist !" % parent_name
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for s in ('_columns', '_defaults', '_inherits'):
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new_dict = copy.copy(getattr(parent_class, s))
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new_dict.update(d.get(s, {}))
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d[s] = new_dict
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bases = (parent_class,)
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res = type.__new__(cls, name, bases, d)
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#
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# update _inherits of others objects
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#
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return res
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class osv(orm.orm):
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#__metaclass__ = inheritor
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def __new__(cls):
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if not hasattr(cls, '_module'):
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module = str(cls)[6:]
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module = module[:len(module)-1]
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module = module.split('.')[0][2:]
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cls._module = module
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module_class_list.setdefault(cls._module, []).append(cls)
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class_pool[cls._name] = cls
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if module not in module_list:
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module_list.append(cls._module)
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return None
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#
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# Goal: try to apply inheritancy at the instanciation level and
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# put objects in the pool var
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#
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def createInstance(cls, pool, module):
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# obj = cls()
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parent_name = hasattr(cls, '_inherit') and cls._inherit
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if parent_name:
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parent_class = pool.get(parent_name).__class__
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assert parent_class, "parent class %s does not exist !" % parent_name
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ndict = {}
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for s in ('_columns', '_defaults', '_inherits'):
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new_dict = copy.copy(getattr(pool.get(parent_name), s))
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new_dict.update(cls.__dict__.get(s, {}))
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ndict[s] = new_dict
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#bases = (parent_class,)
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#obj.__class__ += (parent_class,)
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#res = type.__new__(cls, name, bases, d)
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name = hasattr(cls,'_name') and cls._name or cls._inherit
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name = str(cls)
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cls = type(name, (cls, parent_class), ndict)
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obj = object.__new__(cls)
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obj.__init__(pool)
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return obj
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# return object.__new__(cls, pool)
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createInstance = classmethod(createInstance)
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def __init__(self, pool):
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# print "__init__", self._name, pool
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pool.add(self._name, self)
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self.pool = pool
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orm.orm.__init__(self)
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# pooler.get_pool(cr.dbname).add(self._name, self)
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# print self._name, module
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class Cacheable(object):
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_cache = {}
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count = 0
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def __delete_key(self, key):
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odico = self._cache
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for key_item in key[:-1]:
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odico = odico[key_item]
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del odico[key[-1]]
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def __add_key(self, key, value):
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odico = self._cache
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for key_item in key[:-1]:
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odico = odico.setdefault(key_item, {})
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odico[key[-1]] = value
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def add(self, key, value):
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self.__add_key(key, value)
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def invalidate(self, key):
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self.__delete_key(key)
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def get(self, key):
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try:
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w = self._cache[key]
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return w
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except KeyError:
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return None
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def clear(self):
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self._cache.clear()
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self._items = []
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def filter_dict(d, fields):
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res = {}
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for f in fields + ['id']:
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if f in d:
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res[f] = d[f]
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return res
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class cacheable_osv(osv, Cacheable):
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_relevant = ['lang']
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def __init__(self):
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super(cacheable_osv, self).__init__()
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def read(self, cr, user, ids, fields=[], context={}, load='_classic_read'):
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fields = fields or self._columns.keys()
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ctx = [context.get(x, False) for x in self._relevant]
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result, tofetch = [], []
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for id in ids:
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res = self.get(self._name, id, ctx)
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if not res:
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tofetch.append(id)
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else:
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result.append(filter_dict(res, fields))
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# gen the list of "local" (ie not inherited) fields which are classic or many2one
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nfields = filter(lambda x: x[1]._classic_write, self._columns.items())
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# gen the list of inherited fields
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inherits = map(lambda x: (x[0], x[1][2]), self._inherit_fields.items())
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# complete the field list with the inherited fields which are classic or many2one
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nfields += filter(lambda x: x[1]._classic_write, inherits)
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nfields = [x[0] for x in nfields]
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res = super(cacheable_osv, self).read(cr, user, tofetch, nfields, context, load)
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for r in res:
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self.add((self._name, r['id'], ctx), r)
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result.append(filter_dict(r, fields))
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# Appel de fonction si necessaire
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tofetch = []
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for f in fields:
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if f not in nfields:
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tofetch.append(f)
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for f in tofetch:
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fvals = self._columns[f].get(cr, self, ids, f, user, context=context)
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for r in result:
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r[f] = fvals[r['id']]
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# TODO: tri par self._order !!
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return result
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def invalidate(self, key):
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del self._cache[key[0]][key[1]]
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def write(self, cr, user, ids, values, context={}):
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for id in ids:
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self.invalidate((self._name, id))
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return super(cacheable_osv, self).write(cr, user, ids, values, context)
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def unlink(self, cr, user, ids):
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self.clear()
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return super(cacheable_osv, self).unlink(cr, user, ids)
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#cacheable_osv = osv
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# vim:noexpandtab:
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#class FakePool(object):
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# def __init__(self, module):
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# self.preferred_module = module
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# def get(self, name):
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# localpool = module_objects_dict.get(self.preferred_module, {'dict': {}})['dict']
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# if name in localpool:
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# obj = localpool[name]
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# else:
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# obj = pooler.get_pool(cr.dbname).get(name)
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# return obj
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# fake_pool = self
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# class fake_class(obj.__class__):
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# def __init__(self):
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# super(fake_class, self).__init__()
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# self.pool = fake_pool
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# return fake_class()
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