Reset password by email with devise in Rails

To reset the password by email instead of the username, we need to change the setting in config/initializers/devise.rb and app/models/user.rb.

First of all, please enable the recoverable in app/models/user.rb. For example:

 devise :database_authenticatable, :registerable, :trackable,
        :rememberable, :recoverable, :validatable

Moreover, please make sure you have this line in config/initializers/devise.rb:

config.reset_password_keys = [:email]

If you want to use the username to reset the password, then you use:

config.reset_password_keys = [:username]