如何查询包含数组且数组值为[“val1”、“val2”]Firestore的文档

如何获取查询应适用于文档内数组的集合。

文档示例:我想知道如何查询品牌所在的文档 fiat 和 seat

{
   "name":"test 1",
   "brands":[
      {
         "brand":{
            "id":1,
            "name":"Fiat",
            "slug":"fiat",
            "image":null,
            "year_end":null,
            "year_start":null
         },
         "released_at":"2018-10-26"
      },
      {
         "brand":{
            "id":2,
            "name":"Seat",
            "slug":"seat",
            "image":null,
            "year_end":null,
            "year_start":null
         },
         "released_at":"2018-10-26"
      },
      {
         "brand":{
            "id":3,
            "name":"Mercedes",
            "slug":"mercedes",
            "image":null,
            "year_end":null,
            "year_start":null
         },
         "released_at":"2018-10-26"
      },
      {
         "brand":{
            "id":4,
            "name":"Yamaha",
            "slug":"yamaha",
            "image":null,
            "year_end":null,
            "year_start":null
         },
         "released_at":"2018-10-26"
      }
   ]
}

我试过这样的方法:

.collection("motors")
.where("brands.slug", "array-contains-any", ["fiat", "seat"])

但这是行不通的,我无法通过 documentation 如何得到这个。