def update(self, doc, process=None):
        if process is None:
            pk = 'id'
            id = doc.id
            doc.synced = False
            set = doc
        elif process == UPDATE_PROCESS:
            if self.db.docs.find({'sid': doc.sid}).count() == 0:
                return self.insert(doc, synced=True)
            pk = 'sid'
            id = doc.sid
            doc.synced = not doc.merged() # must be commited if was merged
            doc.merged(False)
            set = {'tid': doc.tid, 'data': doc.data, 'user': doc.user,
                   'public': doc.public, 'synced': doc.synced}
        elif process == COMMIT_PROCESS:
            pk = 'id'
            id = doc.id
            doc.synced = True
            set = {'sid': doc.sid, 'tid': doc.tid, 'synced': doc.synced}
        else:
            raise DatabaseException('Incorrect update process')

        try:
            rs = self.db.docs.update({pk: id}, {'$set': set}, safe=True)
            assert rs['n'] == 1
        except Exception as e:
            raise DatabaseException(e)
        return doc
def testProvenanceItemFiles(self):
        """
        Test item provenance when adding, modifying, and deleting files.
        """
        item = self.item1
        admin = self.admin

        # Test adding a new file to an existing item
        fileData1 = 'Hello world'
        fileData2 = 'Hello world, again'
        fileName1 = 'helloWorld.txt'
        fileName2 = 'helloWorldEdit.txt'
        resp = self.request(
            path='/file', method='POST', user=admin, params={
                'parentType': 'item',
                'parentId': item['_id'],
                'name': fileName1,
                'size': len(fileData1),
                'mimeType': 'text/plain'
            })
        self.assertStatusOk(resp)
        uploadId = resp.json['_id']
        fields = [('offset', 0), ('uploadId', uploadId)]
        files = [('chunk', fileName1, fileData1)]
        resp = self.multipartRequest(
            path='/file/chunk', user=admin, fields=fields, files=files)
        self.assertStatusOk(resp)
        file1 = resp.json
        self._checkProvenance(None, item, 2, admin, 'fileAdded',
                              fileInfo={'fileId': str(file1['_id']),
                                        'new': {'mimeType': 'text/plain',
                                                'size': len(fileData1),
                                                'name': fileName1}})
        # Edit the file name
        resp = self.request(path='/file/%s' % file1['_id'], method='PUT',
                            user=admin, params={'name': fileName2})
        self.assertStatusOk(resp)
        self._checkProvenance(None, item, 3, admin, 'fileUpdate',
                              fileInfo={'fileId': str(file1['_id']),
                                        'old': {'name': fileName1},
                                        'new': {'name': fileName2}})
        # Reupload the file
        resp = self.request(path='/file/%s/contents' % file1['_id'],
                            method='PUT', user=admin,
                            params={'size': len(fileData2)})
        self.assertStatusOk(resp)
        uploadId = resp.json['_id']
        fields = [('offset', 0), ('uploadId', uploadId)]
        files = [('chunk', fileName1, fileData2)]
        resp = self.multipartRequest(
            path='/file/chunk', user=admin, fields=fields, files=files)
        self.assertStatusOk(resp)
        self.assertEqual(file1['_id'], resp.json['_id'])
        self._checkProvenance(None, item, 4, admin, 'fileUpdate',
                              fileInfo={'fileId': str(file1['_id']),
                                        'old': {'size': len(fileData1)},
                                        'new': {'size': len(fileData2)}})
        # Delete the file
        resp = self.request(path='/file/%s' % file1['_id'],
                            method='DELETE', user=admin)
        self.assertStatusOk(resp)
        self._checkProvenance(None, item, 5, admin, 'fileRemoved',
                              fileInfo={'fileId': str(file1['_id']),
                                        'old': {'size': len(fileData2),
                                                'name': fileName2}})