标签: nested-attributes

我的许多Backbone模型经常处理嵌套模型和集合,到目前为止我正在使用组合defaults,parse并toJSON手动实现嵌套:

ACME.Supplier = Backbone.Model.extend({
    defaults: function() {
        return {
            contacts: new ACME.Contacts(),
            tags: new ACME.Tags(),
            attachments: new ACME.Attachments()
        };
    },

    parse: function(res) {
        if (res.contacts) res.contacts = new ACME.Contacts(res.contacts);
        if (res.tags) res.tags = new ACME.Tags(res.tags);
        if (res.attachments) res.attachments = new ACME.Attachments(res.attachments);

        return res;
    }
});

ACME.Tag = Backbone.Model.extend({
    toJSON: function() {
        return _.pick(this.attributes, 'id', 'name', 'type');
    }
});

我看了几个插件,基本上和上面一样,但是控制和更多的样板很少,所以我想知道是否有人对这个常见的Backbone.js问题有更优雅的解决方案.

编辑:我最终采用以下方法:

ACME.Supplier = Backbone.Model.extend({
    initialize: function(options) {
        this.tags = new ACME.Tags(options.tags);
    },

    parse: function(res) …

我有两个模型:我有一个嵌套的表单,允许用户输入@contact和@goal的属性.但是,当我去保存表单输入时,我收到以下错误:

1 error prohibited this contact from being saved:
Goals contact can't be blank

以下是我的目标和联系模式,以及联系人控制器:

class Contact < ActiveRecord::Base

  belongs_to :user
  has_many :goals
  accepts_nested_attributes_for :goals, allow_destroy: true
  validates_presence_of :user_id,:name,:title,:email
end

class Goal < ActiveRecord::Base
  belongs_to :contact
  validates_presence_of :title, :due_date, :contact_id
end

class ContactsController < ApplicationController
  before_action :set_contact, only: [:show, :edit, :update, :destroy]

  # GET /contacts
  # GET /contacts.json
  def index
    @contacts = current_user.contacts
  end

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

  # GET /contacts/new
  def new
    @contact = …

所以我正在使用这个Railscast.

而且我知道Rails 4中的强参数有一些变化.

第一个相关问题.

第二个相关问题

我已经四倍检查了我的实现,但无法看到我出错的地方.就目前而言,在最初提交患者时(即创建方法)勾选"销毁"框,按预期工作,并将删除任何具有复选框的药物,并允许任何不具有(从三种形式输入)它提供).

然而,当我随后编辑该患者时,任何未检查被删除的药物都是重复的(因此我最终得到的药物比我开始时更多),并且任何检查删除的药物似乎都没有改变.

因此,如果有两种药物附加"Med1"和"Med2",并且我编辑患者,如果两者都被标记为删除,我仍然会以"Med1"和"Med2"结束.如果仅将"Med1"标记为删除,我将以"Med1"和"Med2"以及额外的"Med2"结束.如果两者都没有标记为删除,我将最终得到两个"Med1"和"Med2".

#patient.rb
class Patient < ActiveRecord::Base
has_many :procedures
has_many :medications, dependent: :destroy
has_many :previous_operations, dependent: :destroy

accepts_nested_attributes_for :medications, :allow_destroy => true, :reject_if => lambda { |a| a[:name].blank? },
end

#views/patients/_form.html.erb
<%= form_for(@patient) do |f| %>
  <% if @patient.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@patient.errors.count, "error") %> prohibited this patient from being saved:</h2>

      <ul>
      <% @patient.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %> …

我正在使用Rails基于一组复杂的嵌套属性自动神奇地创建子对象.因此,我需要以非常特殊的方式嵌套参数.显然我意识到我可以用JS构建它们,但是我希望表单的顺序自动帮助构造.对于上下文,我有2列,由2 <td>秒表示.每列可以创建新记录或编辑现有记录.当然,当要修改现有记录时,必须传递记录的id.

呈现的HTML如下:

<td width="50%" style="padding-right:3%" class="logistic-details" data-type="logistics" data-typelogistics="delivery" data-instructions="test instructions" data-id="1" data-amount="20">
  <span class="area-to-inject-amount-inputs" data-object="type_logistics" data-type="logistics" data-typelogistics="delivery">
    <input class="labeler-response" name="type_logistics_attributes[][id]" type="hidden" value="1">
    <input class="labeler-response" name="type_logistics_attributes[][instructions]" type="text" value="test instructions">
  </span>
</td>

<td width="50%" style="padding-right:3%" class="logistic-details" data-type="logistics" data-typelogistics="pickup" data-instructions="" data-id="" data-amount="0">
  <span class="area-to-inject-amount-inputs" data-object="type_logistics" data-type="logistics" data-typelogistics="pickup" data-actioned="charged">
    <input type="hidden" name="type_logistics_attributes[][type_of_logistics]" value="pickup">
    <input class="injected-amount-input" type="number" min="0" max="" placeholder="Amount" name="type_logistics_attributes[][charged_amounts_attributes][][amount]" value="20">
    <span class="area-to-inject-type-of-amount">
      <input type="hidden" name="type_logistics_attributes[][charged_amounts_attributes][][type_of_amount]" value="logistics">
    </span>
    <input class="labeler-response" name="type_logistics_attributes[][instructions]" type="text" placeholder="Enter address and instructions">
  </span>                      
</td>

在这种情况下,第一个<td>是修改id为1的现有记录,而第二个<td> …

我有以下型号

class Order < AR::Base
  has_many :products

  accepts_nested_attributes_for :products
end

class Product < AR::Base
  belongs_to :order
  has_and_belongs_to_many :stores

  accepts_nested_attributes_for :stores
end

class Store < AR::Base
  has_and_belongs_to_many :products
end

现在我有一个订单视图,我想更新产品的商店.问题是我只想将产品连接到我的数据库中的现有商店,而不是创建新商店.

我在订单视图中的表单看起来像这样(使用Formtastic):

= semantic_form_for @order do |f|
  = f.inputs :for => :live_products do |live_products_form|
    = live_products_form.inputs :for => :stores do |stores_form|
      = stores_form.input :name, :as => :select, :collection => Store.all.map(&:name)

虽然它嵌套它工作正常.问题是,当我选择商店并尝试更新订单(以及产品和商店)时,Rails会尝试创建一个具有该名称的新商店.我希望它只使用现有商店并将产品连接到该商店.

任何帮助赞赏!

编辑1:

最后,我以一种非常粗暴的方式解决了这个问题:

# ProductsController

def update
  [...]

  # Filter out stores
  stores_attributes = params[:product].delete(:stores_attributes)

  @product.attributes = params[:product]

  if stores_attributes.present?
    # …

我正在尝试使用角度JS,我想从我的rails应用程序中定义的嵌套资源中获取数据.

我写了以下几行:

UserMission = $resource("/users/:user_id/user_missions/:id", {user_id: "@user_id", id: "@id"}, {update: {method: "PUT"}})
$scope.user_missions = UserMission.query()

我收到以下错误:

  Processing by UsersController#show as JSON
  Parameters: {"id"=>"user_missions"}
  User Load (0.6ms)  SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1  [["id", 1]]
  User Load (0.5ms)  SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1  [["id", "user_missions"]]
Completed 404 Not Found in 10ms

ActiveRecord::RecordNotFound (Couldn't find User with id=user_missions):
  app/controllers/users_controller.rb:100:in `current_resource'
  app/controllers/application_controller.rb:34:in `authorize'

我的rails路由组织如下:

resources :users do
  resources :user_missions
end

我认为这归结于我不理解"@id".它说它来自angularjs网站的"数据对象" ,我不确定这意味着什么. …

我正在使用Devise和Rails 4开发一个Web应用程序.我有一个用户模型,我已经扩展了2个额外的表单字段,这样当用户注册时,他也可以提交他的名字/姓氏.(基于http://blog.12spokes.com/web-design-development/adding-custom-fields-to-your-devise-user-model-in-rails-4/).我现在想要添加一个机构模型.此模型has_many:用户和用户belongs_to:institution.我希望能够在注册用户的同一表格上注册该机构的名称.我知道我需要在我的Institution模型中使用nested_attribute ,因为这是父类,我将稍微展示一下.当我尝试注册用户时,我进入控制台:Unpermited参数:机构.

我的提示是我无法根据我的子类(User)更新我的父类(Institution).可能有解决方案吗？或者有没有人经历类似的事情？

class Institutions < ActiveRecord::Base
    has_many :users, 
    accepts_nested_attributes_for :users
end

class User < ActiveRecord::Base
     devise :database_authenticatable, :registerable,
     :recoverable, :rememberable, :trackable, :validatable
     belongs_to :institution
end

registrations/new.html.erb这里我有嵌套表格

<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f|     %>
<%= devise_error_messages! %>
.
. 
    <%= f.fields_for :institutions do |i| %>
        <p><%= i.label :name %><br />
        <%= i.text_field :institutions_attr %></p>
    <% end %>

基于我之前链接的教程,我创建了一个新的 …

我坚持这个简单的选择任务.我有这个型号:

#  id         :integer(4)      not null, primary key
#  category   :string(255)
#  content    :text
class Question < ActiveRecord::Base
    has_many :choices, :dependent => :destroy
    accepts_nested_attributes_for :choices
end

#  id          :integer(4)      not null, primary key
#  content     :text
#  correct     :boolean(1)
#  question_id :integer(4) 
class Choice < ActiveRecord::Base
    belongs_to :question
end

当我创建一个新的问题,我想指定不仅在嵌套形式content的Question,但即使是content3个的Answer对象,并用一个单选按钮哪一个是选择correct答案.在new控制器的动作中,我有这个:

def new
    @title = "New Question"
    @question = Question.new
    3.times { @question.choices.build }

    respond_to do |format|
        format.html # …

我有

class Profile
  has_many :favorite_books, :dependent => :destroy
  has_many :favorite_quotes, :dependent => :destroy

  accepts_nested_attributes_for :favorite_books, :allow_destroy => true
  accepts_nested_attributes_for :favorite_quotes, :allow_destroy => true
end

我有一个动态表单,你按"+"添加新的textareas来创建新的收藏夹.我想要做的是忽略空白,我发现在更新控制器中比非嵌套属性更难排序.

我暂时拥有的是删除空记录的after_save回调中的黑客攻击.什么是最容易忽略这些空白对象的轨道方式？

我不想要验证和错误,只是一个无声的删除/忽略.

我试图创建两个隐藏字段,一个显示没有问题,但另一个来自嵌套表单不会

product.rb

class Product < ActiveRecord::Base
  has_many :product_options,  dependent: :destroy
  accepts_nested_attributes_for :product_options, allow_destroy: true, :reject_if => proc { |x| x[:option_name].blank? }
  belongs_to :user
end 

product_option.rb

class ProductOption < ActiveRecord::Base
  belongs_to :product
end

products_controller.rb

class ProductsController < ActionController::Base
  layout "application"

  def index 
    @products = Product.all
    @current_user = Client.find_by(id: session[:client])
    if @current_user.redeemed == true 
      redirect_to root_path
    end
  end 

  def show
    @product = Product.find(params[:id])
    @product_option = @product.product_options.find(params[:id])
    @current_user = Client.find_by(id: session[:client])
    @current_user.update(:product_option => @product_option.option_name)
    @current_user.update(:selected_product => @product.id)
    render :nothing => true
  end

  private …