Question

我的应用程序中有一个名为“features”的属性。在我的表单中，“features”包含一个复选框列表。这里的想法是用户可以检查哪些“功能”适用于他们的帖子，并且该功能列表会保存到记录中。

我看到数组正在我的控制台中保存（“features”=＆gt; {“私人浴室”=＆gt;“1”，“电梯”=＆gt;“0”，“免费早餐”=＆gt; ;“1”，“Great view”=＆gt;“1”，“有线电视”=＆gt;“0”，“壁炉”=＆gt;“0”，“其他（见说明）”=＆gt;“0” ，“Sweet location”=＆gt;“0”} ）。

然而......当我查看记录时，功能返回nil。它似乎没有保存features数组。

以下提供的代码。知道我在这里做错了吗？

模型/ accommodation.rb

class Accommodation < ActiveRecord::Base
  validates_presence_of :title, :description, :thing, :location
  attr_accessible :photo_attributes, :title, :description, :thing, :borough, :location, :spaces, :price, :features
  has_one :photo
  has_many :requests
  belongs_to :user
  accepts_nested_attributes_for :photo, :allow_destroy => true
end

控制器/ accommodation_controller.rb

class AccommodationsController < ApplicationController

  before_filter :auth, :except => :show

  uses_tiny_mce ( :options => {
    :theme => 'advanced',
    :theme_advanced_toolbar_location => 'top',
    :theme_advanced_toolbar_align => 'left',
    :theme_advanced_buttons1 => 'bold,italic,underline,image,bullist,numlist,separator,undo,redo',
    :theme_advanced_buttons2 => '',
    :theme_advanced_buttons3 => ''
  })

  def show
    @accommodation = Accommodation.find(params[:id])
  end

  def new
    @accommodation = current_user.accommodations.build
    @accommodation.build_photo
  end

  def create
    @accommodation = current_user.accommodations.build(params[:accommodation])
    if @accommodation.save
      flash[:notice] = "Successfully created your accommodation."
      redirect_to @accommodation
    else
      render :new
    end
  end

  def edit
    @accommodation = Accommodation.find(params[:id])
  end

  def update
    @accommodation = Accommodation.find(params[:id])
    if @accommodation.update_attributes(params[:accommodation])
      flash[:notice] = "Successfully updated accommodation."
      redirect_to @accommodation
    else
      render :edit
    end
  end

  def destroy
    @accommodation = Accommodation.find(params[:id])
    @accommodation.destroy
    flash[:notice] = "Successfully destroyed accommodation."
    redirect_to :inkeep
  end

  private

  def auth
    if current_user
      if params[:action] != 'new' && params[:action] != 'create'
        @accommodation = Accommodation.find(params[:id])
        if @accommodation.user_id != current_user.id
          flash[:notice] = "You don't own this accommodation!"
          render :action => 'show'
        end
      end
      return true
    else
      flash[:error]  = "Please login first."
      redirect_to :controller => 'sessions', :action => 'new'
    end
  end

end

视图/住宿/ _form.html.erb

<%= form_for @accommodation, :html => {:multipart => true} do |f| %>
  <%= f.error_messages %>
  <p>
    Title<br />
    <%= f.text_field :title, :size => 60 %>
  </p>
  <p>
    Description<br />
    <%= f.text_area :description, :rows => 17, :cols => 75, :class => "mceEditor" %>
  </p>
  [...snip...]
  <p>
    <i>Featuring...</i>
    <%= fields_for :features do |feature_fields| %>
    <table>
        <tr>
            <td><%= feature_fields.check_box 'Private bathroom' %> Private bathroom</td>
            <td><%= feature_fields.check_box 'Cable TV' %> Cable TV</td>
            <td><%= feature_fields.check_box 'Complimentary breakfast' %> Complimentary breakfast</td>
        </tr>
        <tr>

            <td><%= feature_fields.check_box 'Elevator' %> Elevator</td>
            <td><%= feature_fields.check_box 'Fireplace' %> Fireplace</td>
            <td><%= feature_fields.check_box 'Great view' %> Great view</td>
        </tr>
        <tr>
            <td><%= feature_fields.check_box 'Sweet location' %> Sweet location</td>
            <td><%= feature_fields.check_box 'Other (see description)' %> Other (see description)</td>
        </tr>
    </table>
    <% end %>
  </p>
  [...snip...]
<% end %>

Answer 1

首先，在params散列中你的住宿哈希中的features数组是什么？

其次，没有接受数组的db列类型，因此需要输入

serialize :features

在模型中。这会将数组存储为db中的yaml。您还可以将数据类型指定为serialize（）的参数（在本例中可能是Array），但并不总是必要。

Answer 2

我今天添加了同样的问题，看来表单未在视图中正确构建。确实，仔细看看你的参数：params[:features]在params[:accomodation]

之外

我只是在创建操作开始时添加：

 params[:accomodation][:features] = params[:features]

它运作正常

Answer 3

你的模特怎么样？你有没有attr_accessible或attr_protected调用？

存储复选框选择数组

3 个答案: