在Firebase Cloud Function中,是否有一种方法可以使用字段和数据查询文档ID?
在Android中,我会这样做:
在Android中,我会这样做:
FirebaseFirestore fs = FirebaseFirestore.getInstances();
static final String mInterfaceId = "57ZNmAIldUPAc6ZWggvF";
fs.collection("users").whereEqualTo("interface_id", mInterfaceId).get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
@Override
public void onComplete(@NonNull Task<QuerySnapshot> task) {
for(DocumentSnapshot doc : task.getResult())
userId[0] = doc.getId();
if(userId.length==0)
Log.e("Error: ID Not found");
else
if(userId.length>1)
Log.e("Error: More than one ID found");
else
// Continue Process with Found ID
}
});
提前致谢!