Completed 406 Not Acceptable in devise

Question

I am integrating ios app with rails server. Here, I have implemented devise authentication. when a new person is signing up from my app, I get the following error in my logs

Processing by Devise::RegistrationsController#create as JSON
Parameters: {"password_confirmation"=>"[FILTERED]", "email"=>"[email protected]", "password"=>"[FILTERED]", "registration"=>{"password_confirmation"=>"[FILTERED]", "email"=>"[email protected]", "password"=>"[FILTERED]"}}
WARNING: Can't verify CSRF token authenticity
(0.1ms)  begin transaction
(0.0ms)  rollback transaction
Completed 406 Not Acceptable in 28ms (ActiveRecord: 0.7ms)

Answer 1

Devise responding to json by default has been removed from version 2.2, So add

respond_to :json

in your application controller or the specific controller where you would like to respond with json.

Answer 2

To not allow json acceptance for all controllers, but only for devise add

config.to_prepare do
  DeviseController.respond_to :html, :json
end

only to config/application.rb as recommended here https://github.com/plataformatec/devise/issues/2209