add_index (ActiveRecord::ConnectionAdapters::SchemaStatements. – Ruby on Rails latest stable (v4.2.7) – 6 notes – Class:. add index with :quiet=> true option for indices that are possibly already added. migration example.
add_column ignores index: true · Issue #20400 · rails/rails · GitHub – Jun 1, 2015. Using Rails 4.2.0 the index: true part in the following statement is. Added index option to the add_column migration method #20616.
index. Importance_5. Ruby on Rails latest stable (v4.2.7) – 8 notes – Class:. create_table :user_follows, :force => true do |t| t.references :user t.references. An error has occurred, all later migrations canceled: undefined method `index' for.
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Jul 9, 2015. Learn how unnecessary indexes easily sneak into your Rails application. which creates the model class with associations, as well as a migration:. limit: 1, null: false t.belongs_to :shopping_cart, index: true, foreign_key: true.
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This migration will create a user_id column and appropriate index. For more. : name , false. change_column_default :products , :approved , from: true , to: false.