Djangoorder_by在嵌套的json字段上

我的模特是这样的.

class Foo():
    bar = models.ForeignKey('Bar', related_name='bar')
    payload = JSONField()

class Bar():
    candy = models.ForeignKey('Candy', related_name='candy')

class Candy():
    payload = JSONField()

我的查询集看起来像这样

# I want to order by a name on the json field
queryset = [
{
  "id": 1,
  "payload": {"age": 10, "company": "ccc"}
  "bar": 
   {
     'id': 1,
      "candy":
       {
        "payload": 
           {
           "names": ["text":"abc", "tag":"foo"], ["text":"abb", "tag":"bar"]
           }
       }
   }
 }, 
 {
  "id": 2,
  "payload": {"age": 12, "company": "aa"}
  "bar": 
   {
     'id': 2,
      "candy":
       {
        "payload": 
           {
           "names": ["text":"aaa", "tag":"bar"], ["text":"bbb", "tag":"bart"]
           }
       }
   }
 }]


foo = Foo.objects.all() #now I want to order foo by "names.text"

这是我到目前为止所尝试的

foo = foo.order_by(RawSQL("payload->>%s", ("age",))) #this works!!
foo = foo.order_by(RawSQL("bar.candy.payload->>%s", ("names[0].text",))) #does not work

第二个声明不起作用.我RawSQL从这里 使用Django 1.9 JSONField order_by获得了灵感

我无法弄清楚如何导航到该特定类,然后执行查询.做这个的最好方式是什么？