Indexing a polymorphic assoc adds index on type and id [ci skip]

2015-03-01 14:06:38 -05:00 · 2015-03-01 14:06:38 -05:00 · 683ad0b471
parent edbcdb95ff
commit 683ad0b471
1 changed files with 1 additions and 1 deletions
--- a/guides/source/association_basics.md
+++ b/guides/source/association_basics.md
@ -460,7 +460,7 @@ class CreatePictures < ActiveRecord::Migration
      t.timestamps null: false
    end

-    add_index :pictures, :imageable_id
+    add_index :pictures, [:imageable_id, :imageable_type]
  end
 end
 ```