Firestore：为地图值创建索引

Question

如何为文档中的地图值创建复合索引？

数据：

   {
      name: 'rodel',
      published: 
      {
          name: 'test'
      } 
   }

我需要这样创建吗？

  {
   "fieldPath": "published.name",
   "mode": "ASCENDING"
  }

Answer 1

尝试以下

  {
   "fieldPath": "published.`name`",
   "mode": "ASCENDING"
  }
`