Question

我认为这是一个基本的创建操作，并且记录已保存，但是当我尝试重定向时，我不断收到错误“未定义的方法`状态'为nil：NilClass”。

“状态”是记录中的一列......但是记录正在保存到数据库中。我不知道为什么它不坚持。如果我将重定向路由更改为没有@event参数的“root_path”，它仍然会查找@event类。即使我让post方法说JUST重定向，它也会失败。我已经尝试删除每个操作之前它仍然寻找并且没有找到一些记录（我甚至没有告诉它寻找！）。我查看了模型，看看是否有任何回调都是行为不端。奇怪的是'保存'成功'，但任何重定向失败。

EventsController.rb

def create
    @event = Event.new(event_params)

    respond_to do |format|
      if @event.save
          format.html { redirect_to project_project_date_path(project_id: @event.project_date.project_id, id: @event.project_date_id, event_id: @event.id), notice: 'Event was successfully created.' }
          format.json { render :show, status: :created, location: @event.project_date }
        else
          format.html { redirect_to project_project_date_path(project_id: @event.project_date.project_id, id: @event.project_date_id, event_id: @event.id), alert: 'something went wrong' }
          format.json { render :show, status: :created, location: @event.project_date }
      end
    end
  end

routes.rb

 resources :events, only: [:create]
   resources :projects do 
        resources :project_dates, only: [:show]
   end

_form.html.slim

= simple_form_for @event do |f|

堆栈跟踪......

08:25:24 web.1  | 
08:25:24 web.1  | Started POST "/events" for 127.0.0.1 at 2016-01-29 08:25:24 -0800
08:25:24 web.1  | Processing by EventsController#create as HTML
08:25:24 web.1  |   Parameters: {"utf8"=>"✓", "authenticity_token"=>"3LpsRTpupzPKRWm+cNq/pxQZMhGvlXS9d35GdVRR0dK+i2ZGsRKOOeIOXzMWUEQLpLGrML2gYemeKMP2/vKwaQ==", "event"=>{"project_id"=>"1", "project_date_id"=>"11", "participant_id"=>"7", "editor_participant_id"=>"7", "category"=>"Meals", "address_id"=>"2", "status"=>"pending", "description"=>"sfsdf"}, "commit"=>"ADD "}
08:25:24 web.1  |   User Load (0.3ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1  ORDER BY "users"."id" ASC LIMIT 1  [["id", 7]]
08:25:24 web.1  |   Profile Load (0.8ms)  SELECT "profiles".* FROM "profiles" WHERE "profiles"."user_id" IN (7)
08:25:24 web.1  |    (0.2ms)  BEGIN
08:25:24 web.1  |   ProjectDate Load (0.4ms)  SELECT  "project_dates".* FROM "project_dates" WHERE "project_dates"."id" = $1  ORDER BY "project_dates"."schedule_date" ASC LIMIT 1  [["id", 11]]
08:25:24 web.1  |   SQL (1.3ms)  INSERT INTO "events" ("project_date_id", "project_id", "participant_id", "description", "status", "editor_participant_id", "category", "address_id", "date_start", "date_end", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12) RETURNING "id"  [["project_date_id", 11], ["project_id", 1], ["participant_id", 7], ["description", "sfsdf"], ["status", 3], ["editor_participant_id", 7], ["category", "Meals"], ["address_id", 2], ["date_start", "2016-02-02"], ["date_end", "2016-02-02"], ["created_at", "2016-01-29 16:25:24.764942"], ["updated_at", "2016-01-29 16:25:24.764942"]]
08:25:24 web.1  |   SQL (0.6ms)  UPDATE "project_dates" SET "events_count" = COALESCE("events_count", 0) + 1 WHERE "project_dates"."id" = $1  [["id", 11]]
08:25:24 web.1  |    (2.0ms)  COMMIT
08:25:24 web.1  | Redirected to 
08:25:24 web.1  | Completed 500 Internal Server Error in 39ms (ActiveRecord: 5.6ms)
08:25:24 web.1  | 
08:25:24 web.1  | NoMethodError - undefined method `status' for nil:NilClass:
08:25:24 web.1  |   actionpack (4.2.4) lib/action_controller/metal/instrumentation.rb:65:in `block in redirect_to'
08:25:24 web.1  |   activesupport (4.2.4) lib/active_support/notifications.rb:164:in `block in instrument'
08:25:24 web.1  |   activesupport (4.2.4) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
08:25:24 web.1  |   activesupport (4.2.4) lib/active_support/notifications.rb:164:in `instrument'

ProjectDatesController.rb

def show
    @project = Project.find(params[:project_id])
    @project_date = ProjectDate.find(params[:id])
    @current_user_participation  = Participant.find(7)
    @event = Event.new(project_id: @project.id, project_date_id: @project_date.id )
    @project_dates = @project.project_dates
    current = @project_dates.index(@project_date)
    @next = @project_dates[current + 1] if @project_dates.length >= current + 1
    @prev = @project_dates[current - 1] if current != 0
    @first = @project_dates.first if current != 0
    @last = @project_dates.last if current + 1 < @project_dates.length
    @current = current + 1
    @events = @project_date.events
    if params[:event_id].present?
      @chosen_event = Event.find(params[:event_id])
    end
  end

 def project_date_params
       params.require(:project_date).permit(:id,  
          events_attributes: [:id, :project_date_id, :project_id, :participant_id, :description, :status, :editor_participant_id,
                                      :date_start, :date_end, :all_day, :repeat, :time_start, :time_end, :category, :attendees_count] )
    end

保存后奇怪的重定向失败，nil的未定义方法“status”：NilClass

0 个答案: