Firestore数组包含查询未返回结果 [英] Firestore array contains query not returning result

问题描述

我在集合todos中有大约30条记录，其中几乎25条包含单词work.现在，当我尝试使用array-contains时，它不会返回任何内容.

I have around 30 records in collection todos, almost 25 of them contains the word work. Now when I am trying to use array-contains it doesn't return anything.

这是我的查询代码:

firebase.firestore().collection("todos")
.where('Workdesc', 'array-contains', 'work')
.get()
.then(querySnapshot => {
    querySnapshot.forEach(function(doc) {
        // doc.data() is never undefined for query doc snapshots
        console.log(doc.id, " ===> ", doc.data());
    });
  });

这是我的Firestore屏幕截图:

Here is my Firestore screenshot:

查询似乎按照文档进行，但是为什么不返回任何内容?

Query seems as per docs, but why is it not returning anything?

推荐答案

您没有得到任何结果，因为数据库中的Workdesc属性的类型为String，而数组的类型为 not .看到引号了吗?如果需要数组类型的属性，则应采用这种方式.请参见followers属性，它是一个数组.尝试以相同的方式保存其他属性.

You aren't getting any results, because your Workdesc property in the database is of type String and not array. See the quotation marks? If you need a property of type array, then you should save that way. See followers property, is an array. Try to save the other property in the same way.

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