#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (c) 2009-2011, Nicolas Clairon
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# modification, are permitted provided that the following conditions are met:
#
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# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
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# documentation and/or other materials provided with the distribution.
# * Neither the name of the University of California, Berkeley nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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from pymongo.database import Database as PymongoDatabase
from bson.dbref import DBRef
from mongokit.document import Document
from mongokit.collection import Collection
[docs]class Database(PymongoDatabase):
def __init__(self, *args, **kwargs):
self._collections = {}
super(Database, self).__init__(*args, **kwargs)
def __getattr__(self, key):
if key in self.connection._registered_documents:
document = self.connection._registered_documents[key]
return getattr(self[document.__collection__], key)
else:
if not key in self._collections:
self._collections[key] = Collection(self, key)
return self._collections[key]
[docs] def dereference(self, dbref, model=None):
if model is None:
return super(Database, self).dereference(dbref)
if not isinstance(dbref, DBRef):
raise TypeError("first argument must be a DBRef")
if dbref.database is not None and dbref.database != self.name:
raise ValueError("trying to dereference a DBRef that points to "
"another database (%r not %r)" % (dbref.database, self._Database__name))
if not issubclass(model, Document):
raise TypeError("second argument must be a Document")
return getattr(self[dbref.collection], model.__name__).one({'_id': dbref.id})