After customizing the registration controller I lose password and email validation

My understanding about routing is close to nil.

I have changed my edit registration page such that it should only change password.

In the original basic devise implementation I have 3 fields for password:

new password
new password confirmation
current password

By using update_without_password instead of update_with_password in my registrations controller I was able to get rid of the current_password field and allow other user attributes to be updated without current password confirmation

Another thing I changed was:

  respond_with resource, location: after_update_path_for(resource)
else
  clean_up_passwords resource
  respond_with resource

to:

  redirect_to edit_user_registration_path
else
  clean_up_passwords resource
  redirect_to edit_user_registration_path

I did this because in my edit action I had a @variable which was called in my edit view.

For some reason if a form fails instead of being redirected to /users/edit I was redirected to /users and got an error because of @variable was nil

After making these changes I don't get any password validation, no devise error messages and I can't update the password at all.

The view looks like this:

<div class="col-md-8 col-md-offset-2 well">
  <h2 class="form-signin-heading text-center">Edit Profile</h2>
    <%= devise_error_messages! %>
    <%= render 'layouts/error' %>
  <hr>
    <div class="row">
      <div class="col-md-4">
        <%= form_for(resource, as: resource_name, url: registration_path(resource_name), html: {method: :put }) do |f| %> 
          <div class="form-group">
            <%= f.label :password, "Change Password", class: 'control-label' %> 
            <i>(leave blank if you don't want to change it)</i><br />
            <%= f.password_field :password, autocomplete: "off", class: 'form-control' %>
          </div>
          <div class="form-group">
            <%= f.label :password_confirmation, "New Password Confirmation", class: 'control-label' %><br />
            <%= f.password_field :password_confirmation, autocomplete: "off", class: 'form-control' %>
          </div>
          <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
            <%= f.submit "Save", class: 'btn btn-success'  %>
          </div>
        <%end%>
      </div>
      <hr>
    </div>
  </div>

My new Registration controller looks like this:

class Users::RegistrationsController < Devise::RegistrationsController

  def update
    self.resource = resource_class.to_adapter.get!(send(:"current_#{resource_name}").to_key)
    prev_unconfirmed_email = resource.unconfirmed_email if resource.respond_to?(:unconfirmed_email)

    resource_updated = resource.update_without_password(account_update_params)
    yield resource if block_given?
    if resource_updated
      if is_flashing_format?
        flash_key = update_needs_confirmation?(resource, prev_unconfirmed_email) ?
          :update_needs_confirmation : :updated
        set_flash_message :notice, flash_key
      end
      sign_in resource_name, resource, bypass: true
      redirect_to edit_user_registration_path
    else
      clean_up_passwords resource
      redirect_to edit_user_registration_path
    end
  end

  private
  def account_update_params
    params.require(:user).permit(:first_name, :last_name, :email, :password, :password_confirmation, :telephone, :image, :image_file_path, :address, :birthday)
  end
end

My log:

Started PUT "/users" for 127.0.0.1 at 2015-03-14 13:33:03 +0200
Processing by Users::RegistrationsController#update as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"a3WHTzlH8WHUsCqXVpxevnuwk2Ynf6EVXTYk2+8NnjI=", "user"=>{"password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]"}, "commit"=>"Save"}
  [1m[35mUser Load (1.0ms)[0m  SELECT  `users`.* FROM `users`  WHERE `users`.`id` = 3  ORDER BY `users`.`id` ASC LIMIT 1
  [1m[36mUser Load (1.0ms)[0m  [1mSELECT  `users`.* FROM `users`  WHERE `users`.`id` = 3 LIMIT 1[0m
  [1m[35m (1.0ms)[0m  BEGIN
  [1m[36m (1.0ms)[0m  [1mCOMMIT[0m
Redirected to http://localhost:3000/users/edit
Completed 302 Found in 16ms (ActiveRecord: 4.0ms)