How to delete from firebase realtime database，

Question

enter image description here

I want to delete apple in breakfast separately, but the above method will delete all apples, regardless of whether it is breakfast, lunch, or dinner. Is there any solution? Thank you

Please don't post screenshots of your code, or other textual content. Instead post the actual text, and use the formatting tools of Stack Overflow to mark it up. — Frank van Puffelen, Nov 07 '20 at 15:22

score 0 · Accepted Answer · answered Nov 07 '20 at 15:31

There is no way to add this second condition to the query, as Firebase Realtime Database can only query on one property. See Query based on multiple where clauses in Firebase

If you want to only delete a subset of the items returned by the query, you'll have to check for the addition condition in your loop:

for (DataSnapshot data: snapshot.getChildren()) {
  if ("apple".equals(data.child("foodname").getValue(String.class))) {
    data.getRef().removeValue();
  }
}

Thank you very much, it was so helpful to me – Henry Zhang Nov 08 '20 at 01:20 — Henry Zhang, Nov 08 '20 at 01:20

How to delete from firebase realtime database，

1 Answers1