Android Firestore搜索集合，其中文档是唯一ID [英] Android Firestore search collection where document is Unique id

问题描述

Firestore是否可以在文档名称未知或唯一ID的文档中检索数据.就像在链接的图像中一样.ID是未知的，而名称是已知的，是否可以在这种情况下获取ID?

Is it possible with Firestore to retrieve the data within a document where the name of the document is unknown or a unique id. Like in the linked image. The ID is unknown whereas the name is known, is it possible to get the ID in this instance?

db.collection("users").document(??).collection("John Doe");

推荐答案

您将查询名称:

var peopleRef = db.collection("users");
// there may multiple users if there are more then one `John Doe`
peopleRef.where("name", "==", "John Doe")
.get()
.then(function(querySnapshot) {
    querySnapshot.forEach(function(doc) {
        //Here below will list all people who's name = "John Doe", If only one then this John Doe's  id no: doc.id as fallow:
        console.log(doc.id, " => ", doc.data());
    });
})
.catch(function(error) {
    console.log("Error getting documents: ", error);
});

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