Rails Postgresql - synonym dictionary somewhat not updating

Question

I have a Rails4 app with Postgresql(PG_search) on a MAC. I created the synonym dictionary through rails migration. The synonym dictionary is somewhat working. Setup below

Migrations

CREATE TEXT SEARCH DICTIONARY custom_synonyms_for_keywords ( TEMPLATE = synonym, SYNONYMS = synonyms_for_keywords );
CREATE TEXT SEARCH CONFIGURATION simple_syns_keywords (copy=simple);
ALTER TEXT SEARCH CONFIGURATION simple_syns_keywords ALTER MAPPING FOR asciiword WITH custom_synonyms_for_keywords;

my_synonyms file:
fshk bim24os
fridge refrigerator
postgres pgsql
postgresql pgsql
indices index*

Controller

class Product < ActiveRecord::Base
   pg_search_scope :pg_search, against: :sku,
         using: {
           tsearch: { prefix: true, dictionary: "simple_syns_keywords" }
         }
end

When i run

Product.pg_search("fshk") # returns record of "bim24os"
Product.pg_search("fridge") # returns no record of "refrigerator"

But when i run this, it returns the correct value

SELECT ts_lexize('custom_synonyms_for_keywords', 'fshk');  # returns "bim24os"
SELECT ts_lexize('custom_synonyms_for_keywords', 'fridge');    # returns "refrigerator"

RESULTS

Product.pg_search("fshk")
   Product Load (3.0ms)  SELECT "products".*, ((ts_rank((to_tsvector('simple_syns_keywords', coalesce("products"."sku"::text, ''))), (to_tsquery('simple_syns_keywords', ''' ' || 'fshk' || ' ''' || ':*')), 0))) AS pg_search_rank FROM "products" WHERE (((to_tsvector('simple_syns_keywords', coalesce("products"."sku"::text, ''))) @@ (to_tsquery('simple_syns_keywords', ''' ' || 'fshk' || ' ''' || ':*')))) ORDER BY pg_search_rank DESC, "products"."id" ASC
=> #<ActiveRecord::Relation [#Product id: 1, sku: "BIM24OS"]

Product.pg_search("fridge")
   Product Load (1.8ms)  SELECT "products".*, ((ts_rank((to_tsvector('simple_syns_keywords', coalesce("products"."sku"::text, ''))), (to_tsquery('simple_syns_keywords', ''' ' || 'fridge' || ' ''' || ':*')), 0))) AS pg_search_rank FROM "products" WHERE (((to_tsvector('simple_syns_keywords', coalesce("products"."sku"::text, ''))) @@ (to_tsquery('simple_syns_keywords', ''' ' || 'fridge' || ' ''' || ':*')))) ORDER BY pg_search_rank DESC, "products"."id" ASC
=> ActiveRecord::Relation []

I'm i missing a step because i'm not sure why it's not working. Any help is appreciated.

Thanks

Answer 1

Got it working by adding "simple" in the third line of my SQL migration.

From

ALTER TEXT SEARCH CONFIGURATION simple_syns_keywords 
  ALTER MAPPING FOR asciiword 
  WITH custom_synonyms_for_keywords;

To

ALTER TEXT SEARCH CONFIGURATION simple_syns_keywords 
  ALTER MAPPING FOR asciiword 
  WITH custom_synonyms_for_keywords, simple;