I have a nested form on my Devise registration form, which populates a join table. The join table information is not saving because user_id is nil. This is due to the fact that they are not signed in yet, so I can't pass current_user. How can I pass the user_id to save the join table (Languages Users) in one form?
relevant section of new.html.erb
<%= form_for(resource, as: resource, url: registration_path(resource)) do |f| %> <%= devise_error_messages! %> <div class="field"> <%= f.label :first_name %><br /> <%= f.text_field :first_name, autofocus: true %> </div> <%= f.fields_for :languages_users do |lu| %> <div class="fields"> <%= lu.collection_select(:language_id, Language.order('language ASC').all, :id, :language) %><br> <%= lu.hidden_field :level, value: 1 %> <%#= lu.hidden_field :user_id, value: current_user.id %> <% end %> </div> <div class="actions"> <%= f.submit "Sign up" %> </div> <% end %> registrations_controller.rb
class Users::RegistrationsController < Devise::RegistrationsController before_filter :configure_permitted_parameters def new build_resource({}) resource.languages_users.build(user_id: current_user) respond_with self.resource end def create super end private def configure_permitted_parameters devise_parameter_sanitizer.for(:sign_up) { |u| u.permit(:email, :password, :password_confirmation, :bio, :location, :last_name, :first_name, :nationality, :avatar, languages_users_attributes: [ :language_id, :user_id, :level]) } end end here are my params:
{"utf8"=>"✓", "authenticity_token"=>"v/uM0+B7/XCUKmhyFGoEKqunCllXAK50uZN5f+TDpUsxlnIsgQVPbXhEb1q1P5pmG586iaULRROyarWzAzz12w==", "user"=>{"first_name"=>"Walsh", "last_name"=>"Costigan", "location"=>"w", "nationality"=>"United States", "bio"=>"w", "email"=>"walsh@seamlessdocs.com", "user"=>{"avatar"=>#<ActionDispatch::Http::UploadedFile:0x007fdd25023f78 @tempfile=#<Tempfile:/var/folders/cn/l75pvjk9707bj93z_yykb0t40000gn/T/RackMultipart20160403-6431-1hpthwr.JPG>, @original_filename="IMG_4574.JPG", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"user[user[avatar]]\"; filename=\"IMG_4574.JPG\"\r\nContent-Type: image/jpeg\r\n">}, "languages_users_attributes"=>{"language_id"=>"18", "level"=>"1"}, "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]"}, "commit"=>"Sign up"} UPDATE** This is currently where my code is. It saves the user, but not the languages_user model
user.rb after_create :create_languages_user
def create_languages_user @users = self.id @languages_user = LanguagesUser.new(@user) end registrations controller:
def new @user = User.new build_resource({}) respond_with self.resource end def create super end private def configure_permitted_parameters devise_parameter_sanitizer.for(:sign_up) { |u| u.permit(:email, :password, :password_confirmation, :bio, :location, :last_name, :first_name, :nationality, :avatar, languages_users_attributes: [ :language_id, :level]) } end 3 Answers
Answers 1
It is simple. Just pass block to #create method in Users::RegistrationsController controller
def create super do |user| language_user_params = params[:user][:langauges_user].permit(:language_id,:level) user.languages_users.create(language_id: language_user_params[:language_id], level: language_user_params[:level]) end end Answers 2
you can access the user_id in an after_create callback:
after_create :example_method def example_method NameOfModel.create(user_id: self.id, etc) end Answers 3
You can do like this
after_create :create_languages_user def create_languages_user @languages_user = self.languages_users.create end 
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