Hi Arun,

did you permitted the "avatar" field in the strong parameters?

If you are using Devise, edit your application_controller.rb to something 
like this:

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

  protected

  def configure_permitted_parameters
    devise_parameter_sanitizer.for(:sign_up) << :avatar
  end
end

--
Daniel Loureiro
http://www.learnwithdaniel.com

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