«Первый аргумент в форме не может содержать nil или быть пустым» при попытке создать вложенный ресурс в ruby on rails

В моем приложении я пытаюсь создать вложенный ресурс (шаг для заданной цели), и у меня возникают проблемы с созданием по URL-адресу "/ goals/1/steps/new". Когда я перехожу к этой странице, я получаю сообщение об ошибке «Первый аргумент в форме не может содержать нуль или быть пустым»«Первый аргумент в форме не может содержать nil или быть пустым» при попытке создать вложенный ресурс в ruby on rails

Я действительно не могу понять, почему я не могу создать шаг, который он при создании назначил для которого он был создан. Любая помощь приветствуется.

Ниже мой контроллер шаги и мои шаги образуют

Шаги управления:

class StepsController < ApplicationController 
     #before_action :set_step, only: [:show, :edit, :update, :destroy] 
     before_filter :authorize 

     # GET /steps 
     # GET /steps.json 
     def index 
     @steps = Goal.find(params[:goal_id]).steps.all 
     end 

     # GET /goals/1/steps/new 
     def new 
     @step = Goal.find(params[:goal_id]).steps.new 
     end 

     # GET /steps/1 
     # GET /steps/1.json 
     def show 
     end 

     # GET /steps/1/edit 
     def edit 
     end 

     def create 
     @step = Goal.find(params[:goal_id]).steps.new(step_params) 

     respond_to do |format| 
      if @step.save 
      format.html { redirect_to @step, notice: 'Step was successfully created.' } 
      format.json { render :show, status: :created, location: @step } 
      else 
      format.html { render :new } 
      format.json { render json: @step.errors, status: :unprocessable_entity } 
      end 
     end 

     redirect_to(goal_steps_url(@goal)) 

     end 

     def update 
     @step.update(step_params) 
     respond_to do |format| 
      if @step.update(step_params) 
      format.html { redirect_to @step, notice: 'Step was successfully updated.' } 
      format.json { render :show, status: :ok, location: @step } 
      else 
      format.html { render :edit } 
      format.json { render json: @step.errors, status: :unprocessable_entity } 
      end 
     end 
     end 

     # POST /steps 
     # POST /steps.json 

     def destroy 
     @step.destroy 
     respond_to do |format| 
      format.html { redirect_to steps_url, notice: 'Step was successfully destroyed.' } 
      format.json { head :no_content } 
     end 
     end 

     private 

     def set_step 
      @step = Goal.find(params[:goal_id]).Step.find(params[:id]) 
     end 

     def step_params 
      params.require(:step).permit(:requirement, :completionTime, :goal_id) 
     end 

     end

Шаги формы:

<%= form_for(@steps) do |f| %> 
    <% if @step.errors.any? %> 
    <div id="error_explanation"> 
     <h2><%= pluralize(@step.errors.count, "error") %> prohibited this step from being saved:</h2> 

     <ul> 
     <% @step.errors.full_messages.each do |message| %> 
     <li><%= message %></li> 
     <% end %> 
     </ul> 
    </div> 
    <% end %> 

    <div class="field"> 
    <%= f.label :requirement %><br> 
    <%= f.text_field :requirement %> 
    </div> 
    <div class="field"> 
    <%= f.label :completionTime %><br> 
    <%= f.number_field :completionTime %> 
    </div> 
    <div class="field"> 
    <%= hidden_field_tag :goal_id, goal.id %> 
    </div> 
    <div class="actions"> 
    <%= f.submit %> 
    </div> 
<% end %>

маршруты Файл:

Rails.application.routes.draw do 

    resources :goals do 
    resources :steps 
    end 

    resources :signups 
    get 'welcome/index' 

    resources :calendar 

    resources :todolist 

    resources :to_dos 

    root 'welcome#index' 

    # These routes will be for signup. The first renders a form in the browse, the second will 
    # receive the form and create a user in our database using the data given to us by the user. 
    get '/login' => 'sessions#new' 
    post '/login' => 'sessions#create' 
    get '/logout' => 'sessions#destroy' 

    get '/signup' => 'users#new' 
    post '/users' => 'users#create' 
end

Трассировка стека:

actionview (4.2.5.1) lib/action_view/helpers/form_helper.rb:432:in `form_for' 
app/views/steps/_form.html.erb:1:in `_app_views_steps__form_html_erb__4323915558924223187_70260809990920' 
actionview (4.2.5.1) lib/action_view/template.rb:145:in `block in render' 
activesupport (4.2.5.1) lib/active_support/notifications.rb:166:in `instrument' 
actionview (4.2.5.1) lib/action_view/template.rb:333:in `instrument' 
actionview (4.2.5.1) lib/action_view/template.rb:143:in `render' 
actionview (4.2.5.1) lib/action_view/renderer/partial_renderer.rb:339:in `render_partial' 
actionview (4.2.5.1) lib/action_view/renderer/partial_renderer.rb:310:in `block in render' 
actionview (4.2.5.1) lib/action_view/renderer/abstract_renderer.rb:39:in `block in instrument' 
activesupport (4.2.5.1) lib/active_support/notifications.rb:164:in `block in instrument' 
activesupport (4.2.5.1) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (4.2.5.1) lib/active_support/notifications.rb:164:in `instrument' 
actionview (4.2.5.1) lib/action_view/renderer/abstract_renderer.rb:39:in `instrument' 
actionview (4.2.5.1) lib/action_view/renderer/partial_renderer.rb:309:in `render' 
actionview (4.2.5.1) lib/action_view/renderer/renderer.rb:47:in `render_partial' 
actionview (4.2.5.1) lib/action_view/helpers/rendering_helper.rb:35:in `render' 
app/views/steps/new.html.erb:3:in `_app_views_steps_new_html_erb__538834525682328601_70260798181140' 
actionview (4.2.5.1) lib/action_view/template.rb:145:in `block in render' 
activesupport (4.2.5.1) lib/active_support/notifications.rb:166:in `instrument' 
actionview (4.2.5.1) lib/action_view/template.rb:333:in `instrument' 
actionview (4.2.5.1) lib/action_view/template.rb:143:in `render' 
actionview (4.2.5.1) lib/action_view/renderer/template_renderer.rb:54:in `block (2 levels) in render_template' 
actionview (4.2.5.1) lib/action_view/renderer/abstract_renderer.rb:39:in `block in instrument' 
activesupport (4.2.5.1) lib/active_support/notifications.rb:164:in `block in instrument' 
activesupport (4.2.5.1) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (4.2.5.1) lib/active_support/notifications.rb:164:in `instrument' 
actionview (4.2.5.1) lib/action_view/renderer/abstract_renderer.rb:39:in `instrument' 
actionview (4.2.5.1) lib/action_view/renderer/template_renderer.rb:53:in `block in render_template' 
actionview (4.2.5.1) lib/action_view/renderer/template_renderer.rb:61:in `render_with_layout' 
actionview (4.2.5.1) lib/action_view/renderer/template_renderer.rb:52:in `render_template' 
actionview (4.2.5.1) lib/action_view/renderer/template_renderer.rb:14:in `render' 
actionview (4.2.5.1) lib/action_view/renderer/renderer.rb:42:in `render_template' 
actionview (4.2.5.1) lib/action_view/renderer/renderer.rb:23:in `render' 
actionview (4.2.5.1) lib/action_view/rendering.rb:100:in `_render_template' 
actionpack (4.2.5.1) lib/action_controller/metal/streaming.rb:217:in `_render_template' 
actionview (4.2.5.1) lib/action_view/rendering.rb:83:in `render_to_body' 
actionpack (4.2.5.1) lib/action_controller/metal/rendering.rb:32:in `render_to_body' 
actionpack (4.2.5.1) lib/action_controller/metal/renderers.rb:37:in `render_to_body' 
actionpack (4.2.5.1) lib/abstract_controller/rendering.rb:25:in `render' 
actionpack (4.2.5.1) lib/action_controller/metal/rendering.rb:16:in `render' 
actionpack (4.2.5.1) lib/action_controller/metal/instrumentation.rb:44:in `block (2 levels) in render' 
activesupport (4.2.5.1) lib/active_support/core_ext/benchmark.rb:12:in `block in ms' 
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/benchmark.rb:296:in `realtime' 
activesupport (4.2.5.1) lib/active_support/core_ext/benchmark.rb:12:in `ms' 
actionpack (4.2.5.1) lib/action_controller/metal/instrumentation.rb:44:in `block in render' 
actionpack (4.2.5.1) lib/action_controller/metal/instrumentation.rb:87:in `cleanup_view_runtime' 
activerecord (4.2.5.1) lib/active_record/railties/controller_runtime.rb:25:in `cleanup_view_runtime' 
actionpack (4.2.5.1) lib/action_controller/metal/instrumentation.rb:43:in `render' 
actionpack (4.2.5.1) lib/action_controller/metal/implicit_render.rb:10:in `default_render' 
actionpack (4.2.5.1) lib/action_controller/metal/implicit_render.rb:5:in `send_action' 
actionpack (4.2.5.1) lib/abstract_controller/base.rb:198:in `process_action' 
actionpack (4.2.5.1) lib/action_controller/metal/rendering.rb:10:in `process_action' 
actionpack (4.2.5.1) lib/abstract_controller/callbacks.rb:20:in `block in process_action' 
activesupport (4.2.5.1) lib/active_support/callbacks.rb:117:in `call' 
activesupport (4.2.5.1) lib/active_support/callbacks.rb:117:in `call' 
activesupport (4.2.5.1) lib/active_support/callbacks.rb:555:in `block (2 levels) in compile' 
activesupport (4.2.5.1) lib/active_support/callbacks.rb:505:in `call' 
activesupport (4.2.5.1) lib/active_support/callbacks.rb:505:in `call' 
activesupport (4.2.5.1) lib/active_support/callbacks.rb:92:in `__run_callbacks__' 
activesupport (4.2.5.1) lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks' 
activesupport (4.2.5.1) lib/active_support/callbacks.rb:81:in `run_callbacks' 
actionpack (4.2.5.1) lib/abstract_controller/callbacks.rb:19:in `process_action' 
actionpack (4.2.5.1) lib/action_controller/metal/rescue.rb:29:in `process_action' 
actionpack (4.2.5.1) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action' 
activesupport (4.2.5.1) lib/active_support/notifications.rb:164:in `block in instrument' 
activesupport (4.2.5.1) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (4.2.5.1) lib/active_support/notifications.rb:164:in `instrument' 
actionpack (4.2.5.1) lib/action_controller/metal/instrumentation.rb:30:in `process_action' 
actionpack (4.2.5.1) lib/action_controller/metal/params_wrapper.rb:250:in `process_action' 
activerecord (4.2.5.1) lib/active_record/railties/controller_runtime.rb:18:in `process_action' 
actionpack (4.2.5.1) lib/abstract_controller/base.rb:137:in `process' 
actionview (4.2.5.1) lib/action_view/rendering.rb:30:in `process' 
actionpack (4.2.5.1) lib/action_controller/metal.rb:196:in `dispatch' 
actionpack (4.2.5.1) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch' 
actionpack (4.2.5.1) lib/action_controller/metal.rb:237:in `block in action' 
actionpack (4.2.5.1) lib/action_dispatch/routing/route_set.rb:74:in `call' 
actionpack (4.2.5.1) lib/action_dispatch/routing/route_set.rb:74:in `dispatch' 
actionpack (4.2.5.1) lib/action_dispatch/routing/route_set.rb:43:in `serve' 
actionpack (4.2.5.1) lib/action_dispatch/journey/router.rb:43:in `block in serve' 
actionpack (4.2.5.1) lib/action_dispatch/journey/router.rb:30:in `each' 
actionpack (4.2.5.1) lib/action_dispatch/journey/router.rb:30:in `serve' 
actionpack (4.2.5.1) lib/action_dispatch/routing/route_set.rb:815:in `call' 
rack (1.6.4) lib/rack/etag.rb:24:in `call' 
rack (1.6.4) lib/rack/conditionalget.rb:25:in `call' 
rack (1.6.4) lib/rack/head.rb:13:in `call' 
actionpack (4.2.5.1) lib/action_dispatch/middleware/params_parser.rb:27:in `call' 
actionpack (4.2.5.1) lib/action_dispatch/middleware/flash.rb:260:in `call' 
rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context' 
rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call' 
actionpack (4.2.5.1) lib/action_dispatch/middleware/cookies.rb:560:in `call' 
activerecord (4.2.5.1) lib/active_record/query_cache.rb:36:in `call' 
activerecord (4.2.5.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call' 
activerecord (4.2.5.1) lib/active_record/migration.rb:377:in `call' 
actionpack (4.2.5.1) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' 
activesupport (4.2.5.1) lib/active_support/callbacks.rb:88:in `__run_callbacks__' 
activesupport (4.2.5.1) lib/active_support/callbacks.rb:778:in `_run_call_callbacks' 
activesupport (4.2.5.1) lib/active_support/callbacks.rb:81:in `run_callbacks' 
actionpack (4.2.5.1) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
actionpack (4.2.5.1) lib/action_dispatch/middleware/reloader.rb:73:in `call' 
actionpack (4.2.5.1) lib/action_dispatch/middleware/remote_ip.rb:78:in `call' 
actionpack (4.2.5.1) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' 
web-console (2.3.0) lib/web_console/middleware.rb:28:in `block in call' 
web-console (2.3.0) lib/web_console/middleware.rb:18:in `catch' 
web-console (2.3.0) lib/web_console/middleware.rb:18:in `call' 
actionpack (4.2.5.1) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' 
railties (4.2.5.1) lib/rails/rack/logger.rb:38:in `call_app' 
railties (4.2.5.1) lib/rails/rack/logger.rb:20:in `block in call' 
activesupport (4.2.5.1) lib/active_support/tagged_logging.rb:68:in `block in tagged' 
activesupport (4.2.5.1) lib/active_support/tagged_logging.rb:26:in `tagged' 
activesupport (4.2.5.1) lib/active_support/tagged_logging.rb:68:in `tagged' 
railties (4.2.5.1) lib/rails/rack/logger.rb:20:in `call' 
actionpack (4.2.5.1) lib/action_dispatch/middleware/request_id.rb:21:in `call' 
rack (1.6.4) lib/rack/methodoverride.rb:22:in `call' 
rack (1.6.4) lib/rack/runtime.rb:18:in `call' 
activesupport (4.2.5.1) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call' 
rack (1.6.4) lib/rack/lock.rb:17:in `call' 
actionpack (4.2.5.1) lib/action_dispatch/middleware/static.rb:116:in `call' 
rack (1.6.4) lib/rack/sendfile.rb:113:in `call' 
railties (4.2.5.1) lib/rails/engine.rb:518:in `call' 
railties (4.2.5.1) lib/rails/application.rb:165:in `call' 
rack (1.6.4) lib/rack/lock.rb:17:in `call' 
rack (1.6.4) lib/rack/content_length.rb:15:in `call' 
rack (1.6.4) lib/rack/handler/webrick.rb:88:in `service' 
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service' 
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run' 
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread'

источник

2016-05-05 Frenchy

вставьте маршруты и трассировки стека. –

@ShamsulHaque добавил их в редактирование. – Frenchy

'<% = form_for (@steps) do | f | %> 'это то, откуда вы получаете сообщение об ошибке .. try with' @ step' – sa77

В контроллере: -

def new 
    @goal = Goal.find(params[:goal_id]) 
    @step = @goal.steps.build 
    end 

    def edit 
    @goal = Goal.find(params[:goal_id]) 
    end 

    def create 
    @goal = Goal.find(params[:goal_id]) 
    @step = @goal.steps.new(step_params) 

    respond_to do |format| 
     if @step.save 
     format.html { redirect_to goal_steps_path(@goal), notice: 'Step was successfully created.' } 
     format.json { render :show, status: :created, location: @step } 
     else 
     format.html { render :new } 
     format.json { render json: @step.errors, status: :unprocessable_entity } 
     end 
    end 

    redirect_to(goal_steps_url(@goal)) 

    end 

    def update 
    @goal = Goal.find(params[:goal_id]) 
    @step.update(step_params) 
    respond_to do |format| 
     if @step.update(step_params) 
     format.html { redirect_to goal_steps_path(@goal), notice: 'Step was successfully updated.' } 
     format.json { render :show, status: :ok, location: @step } 
     else 
     format.html { render :edit } 
     format.json { render json: @step.errors, status: :unprocessable_entity } 
     end 
    end 
    end

В форме: -

Заменить линию

<%= form_for(@steps) do |f| %>

<%= form_for[@goal,@step] do |f| %>

источник

2016-05-05 16:52:59

Теперь он дает мне ошибку «неопределенный метод' steps_path »для этой точной строки. – Frenchy

Я обновил сообщение. –

Первый аргумент в виде не может содержать ноль или быть пустым

Во-первых, ошибка происходит из-за вашей форме, содержащей @steps вместо @step, а также вы создаете форму для вложенных ресурсов, так что ваши form_forдва аргумента. Приведенные ниже изменения должны получить вы собираетесь

def new 
    @goal = Goal.find(params[:goal_id]) 
    @step = @goal.steps.build 
end

И в форме, изменить

<%= form_for(@steps) do |f| %>

<%= form_for [@goal, @step] do |f| %>

источник

2016-05-05 16:56:22 Pavan

Это, наконец, получило это! Большое вам спасибо, я был в тупике несколько дней. Какое облегчение: D – Frenchy

«Первый аргумент в форме не может содержать nil или быть пустым» при попытке создать вложенный ресурс в ruby ​​on rails

ответ

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«Первый аргумент в форме не может содержать nil или быть пустым» при попытке создать вложенный ресурс в ruby on rails