Adding extra registration fields with Devise

Question

I am trying to add some extra fields to registrations#new. Since I only want extra data and do not need different functionality, I don\'t see why I need to override controll

Answer 1

As of Devise version 4.3.0, May 15th 2017, the solution is as follows from the documentation. In this case, the username field is being added.

In case you want to permit additional parameters (the lazy way™), you can do so using a simple before filter in your ApplicationController:

class ApplicationController < ActionController::Base
  before_action :configure_permitted_parameters, if: :devise_controller?

  protected

  def configure_permitted_parameters
    devise_parameter_sanitizer.permit(:sign_up, keys: [:username])
  end
end

And of course, simply add the field to your database

> rails g migration AddUsernameToUsers

class AddUsernameToUsers < ActiveRecord::Migration[5.0]
  def change
    add_column :users, :username, :string, null: false, index: true, unique: true
  end
end

And then add the necessary fields into the view for registrations#new

<%= f.text_field :username, placeholder: "Username"  %>