ruby - Unpermitted Parameters: profile (NestedAttributes) - RAILS 4 -

this question has many times asking others user still not solved problem here. im having problem rails apps error "unpermitted parameters: profile" appear.

user_controller.rb

class admin::userscontroller < applicationcontroller   before_filter :set_user, only: [:edit, :update]   before_filter :store_location, only: [:index]   before_filter :require_admin    def edit     if @user       render     else       redirect_to admin_users_path, notice: "user profile not found."     end   end    def update     # rails.logger.debug "===> (1)"     if @user.update(user_params)       redirect_to edit_admin_user_path, notice: "#{@user.profile.full_name} account has been updated."     else       render 'edit'     end   end    private    def set_user     @user = user.find(params[:id])   end    def user_params     params.require(:user).permit(:id, :username, :email, profile_attributes: [:user_id, :full_name])   end end 

edit.html.erb

<%= form_for :user, url: admin_user_path(@user), method: :patch |f| %>    <div class="form-group">     <%= f.label :username %><br>     <%= f.text_field :username, :class => "form-control" %>   </div>    <%= f.fields_for :profile, @user.profile |profile| %>    <div class="form-group">     <%= profile.label :full_name %><br>     <%= profile.text_field : full_name, :class => "form-control" %>   </div>    <% end %>    <div class="form-group">     <%= f.submit "save", :class => "btn btn-primary" %>   </div>  <% end %> 

user.rb

class user < activerecord::base    has_one :profile   accepts_nested_attributes_for :profile #, update_only: true, allow_destroy: true    validates :username, :uniqueness => { :case_sensitive => false }  end 

profile.rb

class profile < activerecord::base    belongs_to :user    validates_presence_of :user_id   validates_presence_of :full_name  end 

development.log

started patch "/master/users/7" 127.0.0.1 @ 2014-09-10 23:18:26 +0800   parameters: {"utf8"=>"✓", "authenticity_token"=>"23oufobayamcrfhw3r11f1x53ljat760shv0hqkmezw=", "user"=>{"username"=>"lisa", "profile"=>{"full_name"=>"evalisa andriaasdasda"}}, "commit"=>"save", "id"=>"7"} [1m[35muser load (0.3ms)[0m  select  `users`.* `users`  `users`.`id` = 7 limit 1 [1m[36muser load (0.3ms)[0m  [1mselect  `users`.* `users`  `users`.`id` = 6  order `users`.`id` asc limit 1[0m unpermitted parameters: profile [1m[35m (0.2ms)[0m  begin [1m[36muser exists (0.4ms)[0m  [1mselect  1 one `users`  (`users`.`username` = 'lisa' , `users`.`id` != 7) limit 1[0m [1m[35m (0.2ms)[0m  commit [1m[36mprofile load (0.4ms)[0m  [1mselect  `profiles`.* `profiles`  `profiles`.`user_id` = 7 limit 1[0m 

i don't know mistake. please help.

thanks in advance!

update user_params method include of attributes profile object. missing id rails trying create profile object , causes undesired behavior (your development log shows making patch request, trying update something, not create something):

def user_params   params.require(:user).permit(:id, :username, :email, profile_attributes: [:id, :user_id, :full_name]) end 

you may have update form pass id of profile object.

see answer look: https://stackoverflow.com/a/17561608/1026898