PROSAGA码农传奇-关联管理-将ManyToMany记录保存到rails后端

<div class =“post-text”itemprop =“text”>
  
    为了在服务器上坚持多对多的关系，我正在攻击
     <code>
 hasMany
 </code>
     序列化程序添加选项的方法
     <code>
 serialized
 </code>
     在映射中。
  
  
    这是序列化程序（CoffeeScript）：
  
   <pre>
 <code>
 App.Serializer = DS.RESTSerializer.extend

# redefine to make it possible to serialize a relationship by an array of ids
  # to enable it, a 'serialized' property should be set to 'ids' in the adapter mapping
  # the key in the hash will be the type of the object in the relation ship + _ids'
  # example : for an hasMany('App.Category'), the key will be category_ids
  addHasMany: (hash, record, key, relationship) ->
    type = record.constructor
    name = relationship.key

serializedType = @serializedType type, name

if serializedType is 'ids'
      key = @singularize(@keyForAttributeName(type, name)) + "_ids"
      manyArray = record.get name
      serializedIds = []
      manyArray.forEach (record) ->
        serializedIds.push record.get('id')
      hash[key] = serializedIds
    else
      return @_super hash, record, key, relationship

# method to access the serialized option in adapter mapping
  serializedType: (type, name) ->
    @mappingOption type, name, 'serialized'

</code>
 </pre>
  
    这是一个映射配置例子：
  
   <pre>
 <code>
 App.Adapter.map App.Product,
 categories:
 serialized: 'ids'

</code>
 </pre>
  
    有了这个，当我犯了一个
     <code>
 Product
 </code>
     json将包含一个键
     <code>
 category_ids
 </code>
     它包含相关类别ID的数组。
  
  
    更新：
  
  
    要正确使用
     <code>
 App.Serializer
 </code>
     定义后，您应该将其添加到应用程序的适配器：
  
   <pre>
 <code>
 App.Adapter = DS.RESTAdapter.extend
 serializer: App.Serializer

</code>
 </pre>
  
    要在您的应用程序中使用此适配器，您必须在商店中进行设置：
  
   <pre>
 <code>
 App.Store = DS.Store.extend
 adapter: 'App.Adapter'

</code>
 </pre>
</DIV>