"Email can't be blank" Devise using username or email

devise, ruby-on-rails-3

Solution

Update

Asiniy's answer below actually works like a charm (:

Original (who knew?)

Your problem is the index on the mysql table, you might remove it from your migrations, but I'm not sure that will solve your problem. Not using the email in Devise is tricky, I would suggest a workaround like a fake email out of the `username`, something like this

"#{user.username}@fake.me"

It's not very clean but I see devise doing something similar for passwords when you use omniauth.

Rails 4 and Strong Parameters

I got into this problem for `username` in rails 4, and I had to configure the permitted parameters as below for `sign_up`:

class ApplicationController < ActionController::Base

  before_filter :configure_permitted_parameters, if: :devise_controller?

  protected

    def configure_permitted_parameters
      devise_parameter_sanitizer.for(:sign_up) do |u|
        u.permit :username, :email, :password, :password_confirmation
      end
    end
end

This is described in Devise Doc

Problem

I was following this how-to on How To: Allow users to sign in using their username or email address and did all the steps detailed there but when I try to register via the `registrations/new.html.erb` form I get this error: ``` Email can't be blank ``` In my model I have: ``` devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable attr_accessible :username, :email, :password, :password_confirmation, :remember_me attr_accessor :login attr_accessible :login ``` and ``` def self.find_first_by_auth_conditions(warden_conditions) conditions = warden_conditions.dup if login = conditions.delete(:login) where(conditions).where(["lower(username) = :value OR lower(email) = :value", { :value => login.downcase }]).first else where(conditions).first end end ``` any advice with this problem? ======= UPDATE I found something here ■[rails]How to use Devise and Rails , without EMail here it is something like: ``` # Email is not required def email_required? false end ``` With that added in my model I can create a record with username and leaving the email field blank, but when I try to create a second record without email the database rises an error: ``` Mysql2::Error: Duplicate entry '' for key 'index_parents_on_email':... ``` Should I use this, remove the index from my table in the database, and just validate the `username` in the model? because I don't really need the email field on that model.

Original source