Enable kuromoji in searching accounts

Author: Hanage999

app/chewy/accounts_index.rb

@@ -23,7 +23,12 @@ class AccountsIndex < Chewy::Index
 
     analyzer: {
       natural: {
-        tokenizer: 'standard',
+        tokenizer: 'kuromoji_user_dict',
+        char_filter: %w(
+          icu_normalizer
+          html_strip
+          kuromoji_iteration_mark
+        ),
         filter: %w(
           lowercase
           asciifolding
@@ -32,6 +37,10 @@ class AccountsIndex < Chewy::Index
           english_possessive_stemmer
           english_stop
           english_stemmer
+          kurojoji_stemmer
+          kuromoji_number
+          kuromoji_baseform
+          icu_normalizer
         ),
       },
 
@@ -52,6 +61,12 @@ class AccountsIndex < Chewy::Index
         min_gram: 1,
         max_gram: 15,
       },
+
+      kuromoji_user_dict: {
+        type: 'kuromoji_tokenizer',
+	mode: 'search',
+        user_dictionary: 'userdic.txt',
+      },
     },
   }