whoosh_cn_backend.py 文件源码

def setup(self):
        """
        Defers loading until needed.
        """
        from haystack import connections
        new_index = False

        # Make sure the index is there.
        if self.use_file_storage and not os.path.exists(self.path):
            os.makedirs(self.path)
            new_index = True

        if self.use_file_storage and not os.access(self.path, os.W_OK):
            raise IOError("The path to your Whoosh index '%s' is not writable for the current user/group." % self.path)

        if self.use_file_storage:
            self.storage = FileStorage(self.path)
        else:
            global LOCALS

            if getattr(LOCALS, 'RAM_STORE', None) is None:
                LOCALS.RAM_STORE = RamStorage()

            self.storage = LOCALS.RAM_STORE

        self.content_field_name, self.schema = self.build_schema(connections[self.connection_alias].get_unified_index().all_searchfields())
        self.parser = QueryParser(self.content_field_name, schema=self.schema)

        if new_index is True:
            self.index = self.storage.create_index(self.schema)
        else:
            try:
                self.index = self.storage.open_index(schema=self.schema)
            except index.EmptyIndexError:
                self.index = self.storage.create_index(self.schema)

        self.setup_complete = True