Question

我正在创建一个表单，用于向建议框添加建议。但是，虽然我能够成功提交表单并且rails返回成功提交建议的flash消息，但建议消息的值为nil。

我已经使用嵌套资源审核了表单上的各种其他帖子，但没有任何帮助我解决问题。

这就是我在做的事情：

1。转到localhost：3000 / suggestion_boxes / 1 / suggestions / new

2。将显示表单app / views / suggestions / new.html.haml：

%header
  %h1.title
    = @suggestion_box.name + " Suggestion Box"
.main
  = form_for ([@suggestion_box, @suggestion_box.suggestions.build]) do |f|
    - if @suggestion.errors.any?
      #error_explanation
        %ul
          - @suggestion.errors.messages.values.each do |msg|
            = msg.to_sentence
    .field
      %br/
      = f.text_area :suggestion_message, type:"text", placeholder:"Drop a note in our suggestion box...", :rows => 6, :cols => 30
    .actions
      = f.submit "Continue"

第3。我在：suggestion_message字段中输入文本，然后单击“提交”。然后显示app / views / suggestion_boxes / show.html.haml：

%header
  %h1.title
    = @suggestion_box.name + " Suggestion Box"
%p#notice= notice
%p
  = link_to "Post a new suggestion", new_suggestion_box_suggestion_path(@suggestion_box)
%table
  %tr
    %th Message
    - @suggestions.each do |suggestion|
      %tr
        %td
          = suggestion.suggestion_message

但是，在显示提示已成功提交的Flash消息时，suggestion_message表格为空白。

这是我在查询数据库以获取此建议框的建议时得到的结果：

Suggestion Load (1.1ms)  SELECT "suggestions".* FROM "suggestions" WHERE
"suggestions"."suggestion_box_id" = 1 => [#<Suggestion id: 1, suggestion_message: nil, created_at: "2013-06-04 15:49:58", updated_at: "2013-06-04 15:49:58", anonymous_suggestion: nil, member_id: nil, suggestion_box_id: 1>,

＃]

有关为什么建议信息为零的任何想法，即使它似乎正在保存？

非常感谢您的帮助！

可能需要回答此问题的文件的摘录。我只包括了我认为的相关部分

SuggestionBox模型：

class SuggestionBox < ActiveRecord::Base
  attr_accessible :name , :suggestions_attributes
  belongs_to :organization
  has_many :suggestions, :dependent => :destroy 
  accepts_nested_attributes_for :suggestions
end

建议模型：

class Suggestion < ActiveRecord::Base
  attr_accessible :suggestion_message, :anonymous_suggestion
  belongs_to :suggestion_box
end

的routes.rb

SuggestionBoxApp::Application.routes.draw do
  resources :invites, :organizations, :users, :sessions, :password_resets

  resources :suggestion_boxes do
    resources :suggestions
  end
end

建议控制器

class SuggestionsController < ApplicationController

  def new
    @suggestion_box = SuggestionBox.find(params[:suggestion_box_id])
    @suggestion = @suggestion_box.suggestions.build

    flash[:error] = "Sorry, no suggestion box found with the id #{:id}." and return unless @suggestion_box

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @suggestion }
    end
  end

  def create
    @suggestion_box = SuggestionBox.find(params[:suggestion_box_id])
    @suggestion = @suggestion_box.suggestions.new

    respond_to do |format|
      if @suggestion.save
        format.html { redirect_to suggestion_box_path(@suggestion_box), notice: 'Suggestion was successfully submitted.' }
        format.json { render json: @suggestion, status: :created }
      else
        format.html { render action: "new" }
        format.json { render json: @suggestion.errors, status: :unprocessable_entity }
      end
    end
  end
end

SuggestionBox控制器

  class SuggestionBoxesController < ApplicationController
    def show
      @suggestion_box = SuggestionBox.find(params[:id])
      @suggestions = @suggestion_box.suggestions.all

      respond_to do |format|
        format.html # show.html.erb
        format.json { render json: @suggestions }
      end
    end
  end

Answer 1

为什么要使用嵌套表单，因为你只创建了建议？

= form_for @suggestion do |f|

其他所有内容都应该保留不变，它应该有效。

顺便说一句，由于您不使用嵌套属性，因此accepts_nested_attributes_for :suggestions模型中既不需要attr_accessible :suggestions_attributes也不需要SuggestionBox。

使用嵌套资源的Rails表单生成nil输出

1 个答案: