railsでマイグレーションを実行しようとしたところ以下のエラーが発生しました。
command
1user@Users-MBP-70 Prototype0615 % rails db:migrate 2Running via Spring preloader in process 3074 3== 20220627155227 CreateRooms: migrating ====================================== 4-- create_table(:rooms) 5 -> 0.0172s 6-- add_index(:rooms, :user_id) 7rake aborted! 8StandardError: An error has occurred, all later migrations canceled: 9 10Mysql2::Error: Duplicate key name 'index_rooms_on_user_id' 11/Users/user/Library/Mobile Documents/com~apple~CloudDocs/ビジネス/添削スキルシェア/アプリ/試作/Prototype0615/db/migrate/20220627155227_create_rooms.rb:13:in `change' 12<internal:/Users/user/.rbenv/versions/3.0.2/lib/ruby/site_ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require' 13<internal:/Users/user/.rbenv/versions/3.0.2/lib/ruby/site_ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require' 14-e:1:in `<main>' 15 16Caused by: 17ActiveRecord::StatementInvalid: Mysql2::Error: Duplicate key name 'index_rooms_on_user_id' 18/Users/user/Library/Mobile Documents/com~apple~CloudDocs/ビジネス/添削スキルシェア/アプリ/試作/Prototype0615/db/migrate/20220627155227_create_rooms.rb:13:in `change' 19<internal:/Users/user/.rbenv/versions/3.0.2/lib/ruby/site_ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require' 20<internal:/Users/user/.rbenv/versions/3.0.2/lib/ruby/site_ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require' 21-e:1:in `<main>' 22 23Caused by: 24Mysql2::Error: Duplicate key name 'index_rooms_on_user_id' 25/Users/user/Library/Mobile Documents/com~apple~CloudDocs/ビジネス/添削スキルシェア/アプリ/試作/Prototype0615/db/migrate/20220627155227_create_rooms.rb:13:in `change' 26<internal:/Users/user/.rbenv/versions/3.0.2/lib/ruby/site_ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require' 27<internal:/Users/user/.rbenv/versions/3.0.2/lib/ruby/site_ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85:in `require' 28-e:1:in `<main>' 29Tasks: TOP => db:migrate 30(See full trace by running task with --trace)
ruby
1class CreateRooms < ActiveRecord::Migration[6.1] 2 def change 3 create_table :rooms do |t| 4 t.references :user, null: false, foreign_key: true 5 t.references :receiver, null: false, foreign_key: { to_table: :users } 6 t.integer :room_id, null: false 7 t.text :last_message 8 t.datetime :last_message_at 9 t.boolean :new_message 10 11 t.timestamps 12 end 13 add_index :rooms, :user_id 14 add_index :rooms, :room_id 15 end 16end
references型の場合どうすればadd indexできますか?
ちなみにroom_idのカラムは問題なくindexを追加できます。
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