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【Ruby on Rails】NoMethodError: undefined method `t' for #<ActiveRecord::Migration:〇〇〇〇>エラーの対処

Last updated at Posted at 2020-11-14

#エラー画面スクリーンショット 2020-11-15 7.34.48.png

#該当のソースコード

class AddDeviseToUsers < ActiveRecord::Migration[6.0]
  def change
    create_table :users do |t|
      t.string :name,          null: false
      t.text :profile
    end
  end
  t.string :email,              null: false, default: ''
  t.string :encrypted_password, null: false, default: ''
end

#原因
メソッドtの定義はそのcreate_tableのdoに対するendまでの範囲でしか使えない

#解決

class AddDeviseToUsers < ActiveRecord::Migration[6.0]
  def change
    create_table :users do |t|
      t.string :name,               null: false
      t.text   :profile
      #下の二行をdoの中に入れた
      t.string :email,              null: false, default: ''
      t.string :encrypted_password, null: false, default: ''
    end
  end
end

#補足
rake db:migrateしてもSchema.rbに反映されない方はrake db:migrate:rollbackで一度マイグレーションを落としてからマイグレーションを変更してrake db:migrateしてください。

【参考資料】https://qiita.com/s_tatsuki/items/3e1f119c91e21b8f0c33

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