__init__.py 文件源码

def filter_query(self, query, filters=None):
    """Add query filter to restrict to this key range.

    Args:
      query: A db.Query or ndb.Query instance.
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      The input query restricted to this key range.
    """
    if ndb is not None:
      if _IsNdbQuery(query):
        return self.filter_ndb_query(query, filters=filters)
    assert not _IsNdbQuery(query)


    if filters:
      for f in filters:
        query.filter("%s %s" % (f[0], f[1]), f[2])

    if self.include_start:
      start_comparator = ">="
    else:
      start_comparator = ">"
    if self.include_end:
      end_comparator = "<="
    else:
      end_comparator = "<"
    if self.key_start:
      query.filter("__key__ %s" % start_comparator, self.key_start)
    if self.key_end:
      query.filter("__key__ %s" % end_comparator, self.key_end)
    return query