ActiveModel::ForbiddenAttributesError - Rails4 - ruby-on-rails-4

Question

Environment:
Windows 8.1
Rails4
Ruby 2
I am using Devise and I have two separate controllers: users_controller.rb and registrations_controller.rb.
Following is my registrations_controller.rb:
class RegistrationsController < Devise::RegistrationsController
before_filter :update_sanitized_params, if: :devise_controller?
def update_sanitized_params
devise_parameter_sanitizer.for(:sign_up) {|u| u.permit(:first, :last,
:email, :password,
:password_conf, :password_changed_at)}
devise_parameter_sanitizer.for(:account_update) {|u| u.permit(:first, :last, :salutation,
:email, :password,
:password_conf, :password_changed_at, :current_passwor)}
end
# GET /registrations/new
def new
super
end
# POST /registrations
# POST /registrations.json
def create
#user = User.new(registration_params)
#user.email = #user.email.downcase
##user.slug = "#{#user.first.downcase}_#{#user.last.downcase}_#{#user.email}"
respond_to do |format|
if #user.save
format.html { redirect_to #user, notice: t('registration_successfully_created') }
format.json { render :show, status: :created, location: #user }
else
format.html { render :new }
format.json { render json: #user.errors, status: :unprocessable_entity }
end
end
end
# DELETE /registrations/1
# DELETE /registrations/1.json
def destroy
#user.destroy
respond_to do |format|
format.html { redirect_to registrations_url }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_registration
#user = User.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def registration_params
params[:user]
end
end
and following is my User model: user.rb
class User < ActiveRecord::Base
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable,
:password_expirable, :confirmable, :lockable, :timeoutable
validates :first, presence: true
validates :last, presence: true
validates :email, :email => true, presence: true, uniqueness: {case_sensitive: false}
before_save { |user| user.email = email.downcase }
end
When I try to create a new user, I get an error message:
ActiveModel::ForbiddenAttributesError
The following line is highlighted in the registrations controller:
#user = User.new(registration_params)
Witht the additional debug information:
{"utf8"=>"✓", "authenticity_token"=>"CRwY4emBZJXhH7kMNGQZR5H1D3D0IJrHCnBzs5PTE8U=", "user"=>{"email"=>"xxxx#jkjjjkj.com", "password"=>"xxxxxxx", "password_confirmation"=>"xxxxxxx", "first"=>"John", "last"=>"Doe"}, "commit"=>"Create User", "action"=>"create", "controller"=>"registrations"}
Any ideas?

Answer 1

You have defined a method for strong parameters but you cannot just return the params hash - instead you have to specifically whitelist the attributes you wish to pass on to the model.
def registration_params
params.require(:user).permit(:email, :password, :password_confirmation, ...) # etc for the rest of your attributes
end