當指定的資料庫不存在時引發。
方法
包含的模組
類別公開方法
db_error(db_name) 連結
# File activerecord/lib/active_record/errors.rb, line 340 def db_error(db_name) NoDatabaseError.new(<<~MSG) We could not find your database: #{db_name}. Available database configurations can be found in config/database.yml. To resolve this error: - Did you not create the database, or did you delete it? To create the database, run: bin/rails db:create - Has the database name changed? Verify that config/database.yml contains the correct database name. MSG end