engine.py 文件源码

def _create_text_index(self, fields=None):
        """Create a text index for the database collection.

        Takes a list of fields and creates a text index based on the
        Engine's schema, if it has one. Otherwise, creates a text index
        for any field that contains string content.
        """
        collection = self._collection
        index_name = 'TextIndex'

        if fields:
            index = []
            for field in self.schema:
                if field.field_type in self.TEXT_INDEXES:
                    index.append((field.field_name, pymongo.TEXT))
            return collection.create_index(index, background=True,
                                           name=index_name)
        else:
            return collection.create_index([('$**', pymongo.TEXT)],
                                           name=index_name)