Firestore根据条件执行删除 [英] Firestore perform delete based on condition

问题描述

是否可以对 field1 = x 和 field2 = y的Firestore文档执行删除操作?

Is there a way I can perform a delete on Firestore documents where field1 =x and field2 = y?

我看到了删除功能，但是没有附带. 如果我使用事务，则存在get和delete，但get似乎不接受"where"子句.

I see the delete function but does not come with where. If I use the transaction then there is get and delete but the get does not seem to accept "where" clause.

我希望我在文档中缺少一些内容.

I hope I am missing something in the documentation.

谢谢

推荐答案

要实现此目的，您需要先创建所需的查询，然后才使用delete()方法，如下所示:

To achieve this, you need to create the desired query first and then just use the delete() method like this:

FirebaseFirestore rootRef = FirebaseFirestore.getInstance();
CollectionReference itemsRef = rootRef.collection("yourCollection");
Query query = itemsRef.whereEqualTo("field1", "x").whereEqualTo("field2", "y");
query.get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
    @Override
    public void onComplete(@NonNull Task<QuerySnapshot> task) {
        if (task.isSuccessful()) {
            for (DocumentSnapshot document : task.getResult()) {
                itemsRef.document(document.getId()).delete();
            }
        } else {
            Log.d(TAG, "Error getting documents: ", task.getException());
        }
    }
});

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