通过链接查询中的条件来查找匹配多个条件的文档会很诱人:

It would be tempting to to look for documents that match multiple conditions, by chaining the conditions in the query:

db.collection("Fruits")
    .whereField("vitamins", arrayContains: "B6")
    .whereField("vitamins", arrayContains: "C")

但是关于复合查询的文档表明您不能当前在单个查询中有多个 arrayContains 条件.

But the documentation on compound queries suggests that you cannot currently have multiple arrayContains conditions in a single query.

所以，用你今天拥有的东西是不可能的.考虑使用映射结构而不是数组:

So, it is not possible with what you have today. Consider instead using a map structure instead of an array:

Fruits:
  Banana:
   title: "Banana"
   vitamins: {
     "potassium": true,
     "B6": true,
     "C": true
   }

然后你可以这样查询:

db.collection("Fruits")
    .whereField("vitamins.B6", isEqualTo: true)
    .whereField("vitamins.C", isEqualTo: true)