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 from_json(self, filename: str, silent: bool = False) -> bool:
        """Update the values in the config from a JSON file. The loaded
        data is passed to the :meth:`from_mapping` method.

        :param filename: The path to the JSON file. This can be an
            absolute path or relative to the config root path.
        :param silent: Ignore the file if it doesn't exist.

        .. deprecated:: 2.0.0
            Will be removed in Flask 2.1. Use :meth:`from_file` instead.
            This was removed early in 2.0.0, was added back in 2.0.1.

        .. versionadded:: 0.11
        """
        import warnings
        from . import json

        warnings.warn(
            "'from_json' is deprecated and will be removed in Flask"
            " 2.1. Use 'from_file(path, json.load)' instead.",
            DeprecationWarning,
            stacklevel=2,
        )
        return self.from_file(filename, json.load, silent=silent)