Rails 4 Devise 3.1.1 ActionController::UnknownFormat in Devise::RegistrationsController#new

Question

I am working on a Rails 4 app using Devise 3.1.1 for user authentication. When I click on /users/sign_up.user link Rails throws following exception:

ActionController::UnknownFormat in Devise::RegistrationsController#new
ActionController::UnknownFormat

Rails.root: /home/rehan/odesk_work/kiefer-waight/ujoin/ujoin-www

Application Trace | Framework Trace | Full Trace
actionpack (4.0.0) lib/action_controller/metal/mime_responds.rb:372:in `retrieve_collector_from_mimes'
actionpack (4.0.0) lib/action_controller/metal/mime_responds.rb:327:in `respond_with'
devise (3.1.1) app/controllers/devise/registrations_controller.rb:8:in `new'
actionpack (4.0.0) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (4.0.0) lib/abstract_controller/base.rb:189:in `process_action'
actionpack (4.0.0) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (4.0.0) lib/abstract_controller/callbacks.rb:18:in `block in process_action'
activesupport (4.0.0) lib/active_support/callbacks.rb:413:in `_run__890637270__process_action__callbacks'
....

I was actually on Devise 3.0.0.rc when started the app, I thought upgrading the devise to 3.1.1 might solve the problem, but it didn't. Couldn't find anything useful on SO/google/devise github project. Any idea how to work around it. Thanks!

Answer 1

I did not want to change default links produced by Devise which appended ".user" at the end of each link. Devise produced following links:

new_user_registration_path(resource_name) new_user_session_path(resource_name) new_user_password_path(resource_name)

resource_name, which is user, as parameter to the path in link_to method which tells it to use ".user" as format. So I just removed resource_name from each path. I wonder why Devise does this though!

Answer 2

@zeeshan's answer works, you can also the functions without the _user infix:

new_registration_path(resource_name)

new_session_path(resource_name)

new_password_path(resource_name)

Answer 3

I've just resolved this problem also.

The solution is to revert all paths to Devise default ones , meaning to say no _user infix.

Note that we are not able to test in console these code:

user = User.all.sample
app.new_registration_path(user)

because Devise use its helper to transform the url automatically internally so we cannot test from outside.

Answer 4

When you say you click on the /users/sign_up.user link, do you literally mean that exact path? Because the .user on the end is telling it to try and respond with a user format, akin to pdf , xml , or json . Remove that and see what happens.