collection.py 文件源码

def drop_index(self, index_or_name):
        """Drops the specified index on this collection.

        Can be used on non-existant collections or collections with no
        indexes.  Raises OperationFailure on an error. `index_or_name`
        can be either an index name (as returned by `create_index`),
        or an index specifier (as passed to `create_index`). An index
        specifier should be a list of (key, direction) pairs. Raises
        TypeError if index is not an instance of (str, unicode, list).

        .. warning::

          if a custom name was used on index creation (by
          passing the `name` parameter to :meth:`create_index` or
          :meth:`ensure_index`) the index **must** be dropped by name.

        :Parameters:
          - `index_or_name`: index (or name of index) to drop
        """
        name = index_or_name
        if isinstance(index_or_name, list):
            name = _gen_index_name(index_or_name)

        if not isinstance(name, basestring):
            raise TypeError("index_or_name must be an index name or list")

        self.__database.connection._purge_index(self.__database.name,
                                                self.__name, name)
        self.__database.command("dropIndexes", self.__name, index=name,
                                allowable_errors=["ns not found"])