Rails：Pg搜索，使用associated_against功能实现dmetaphone

Question

创建后：

rails g pg_search:migration:dmetaphone

我收到了这个错误：

Adding support functions for pg_search :dmetaphone
-- execute("CREATE OR REPLACE FUNCTION pg_search_dmetaphone(text) RETURNS text LANGUAGE SQL IMMUTABLE STRICT AS $function$\n  SELECT array_to_string(ARRAY(SELECT dmetaphone(unnest(regexp_split_to_array($1, E'\\\\s+')))), ' ')\n$function$;\n")
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:

PG::UndefinedFunction: ERROR:  function dmetaphone(text) does not exist
LINE 2:   SELECT array_to_string(ARRAY(SELECT dmetaphone(unnest(rege...

Answer 1

听起来您忘了在系统上安装postgresql-contrib软件包。