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 cell_edited_callback(self, text_cell, path, new_text):
        """If a backend name is changed, it saves the changes in the Backend

        @param text_cell: not used. The Gtk.CellRendererText that emitted the
                          signal. Only here because it's passed by the signal
        @param path: the Gtk.TreePath of the edited cell
        @param new_text: the new name of the backend
        """
        # we strip everything not permitted in backend names
        new_text = ''.join(c for c in new_text if (c.isalnum() or c in [" ", "-", "_"]))
        selected_iter = self.liststore.get_iter(path)
        # update the backend name
        backend_id = self.liststore.get_value(selected_iter,
                                              self.COLUMN_BACKEND_ID)
        backend = self.dialog.get_requester().get_backend(backend_id)
        if backend:
            backend.set_human_name(new_text)
            # update the text in the liststore
            self.liststore.set(selected_iter, self.COLUMN_TEXT, new_text)