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Rails accepts_nested_attributes_for表单嵌套的利器

2024-07-09 00:46:45   220人阅读

 

http://blog.csdn.net/kunshan_shenbin/article/details/7249713http://api.rubyonrails.org/classes/ActionView/Helpers/FormBuilder.html#method-i-fields_forhttp://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html#method-i-accepts_nested_attributes_for


 

还在为表单嵌套而苦恼么,看看accepts_nested_attributes_for方法吧,今天在项目里用过之后,更爱这门语言了.

# eoncoding: UTF-8class Package  include Mongoid::Document  include Mongoid::Timestamps  include ImageUploadable  store_in collection: ‘all_apps‘  field :language, type: String, default: ‘中文‘  field :url, as: :download_url, type: String //as别名  field :intro_icons, type: Array, default: []  field :updated_on, type: Date  field :is_actived, type: Boolean, default: false  field :position, type: Integer, default: 0  field :is_deleted, type: Boolean, default: false  index code: 1 //索引  index package: 1  has_many :recommend_apps, foreign_key: ‘app_id‘  accepts_nested_attributes_for :recommend_apps

 

class RecommendApp  include Mongoid::Document  include Mongoid::Timestamps  include ImageUploadable  validates :app_id, presence: true  validates :type, inclusion: { in: TYPES.keys  }  validates :app_id, uniqueness: { scope: :type }  belongs_to :package, foreign_key: ‘app_id‘

 

<%= form_for @recommend_app, html: { class: package_form_class(@recommend_app), role: ‘form‘ }  do |f|  %>    <div class="form-group">    <%= f.label :position, "推荐位置", class: "col-sm-2 control-label" %>    <div class="col-sm-3">      <%= f.text_field :position,:class =>"form-control" %>    </div>  </div>  <%= fields_for :package do |package| %>  <div class="form-group">    <%= package.label :title, "名称", class: "col-sm-2 control-label" %>    <div class="col-sm-3">      <%= package.text_field :title ,:class =>"form-control" %>    </div>  </div> <% end %>

recommend_apps_controller.rb

  def edit    @package = @recommend_app.package  end   def update    old_position = @recommend_app.position    if @recommend_app.update_attributes recommend_app_params      @package = @recommend_app.package      if @package.update_attributes package_params        @recommend_app.adjust_recommend_app_position(@recommend_app.position)        redirect_to recommend_apps_path, notice: ‘操作成功‘      end     else      render :edit    end   end

 

fields_for(record_name, record_object = nil, fields_options = {}, &block)

可以看下下面的文档

http://api.rubyonrails.org/classes/ActionView/Helpers/FormBuilder.html#method-i-fields_for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


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