son_manipulator.py 文件源码

def transform_incoming(self, son, collection):
        """Add an _id field if it is missing.
        """
        if not "_id" in son:
            son["_id"] = ObjectId()
        return son


# This is now handled during BSON encoding (for performance reasons),
# but I'm keeping this here as a reference for those implementing new
# SONManipulators.