[英]firebase, how to update data at a key
我在更新存儲桶(鍵)上的對象時遇到一些困難。 在持久性時,我push()
對象列表(在本例中為Trip) push()
到節點。 后來,我檢索了它,並在單擊按鈕時進行了更新(在這種情況下,是更新出價信息)。 我似乎找不到一個簡單的方法來執行此操作,除非之前進行過行程,否則必須手動調用getkey()
,然后將自動生成的uid更新為對象Trip本身。 有什么想法可以輕松完成嗎? 謝謝
mFirebaseAdapter = new FirebaseRecyclerAdapter<Trip,
TripViewHolder>(
Trip.class,
R.layout.item_message,
TripViewHolder.class,
mFirebaseDatabaseReference.child(CHILD_TRIPS)) {
@Override
protected void populateViewHolder(TripViewHolder viewHolder, final Trip model, int position) {
viewHolder.btnTakeNow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Bid bidAtReserved = new Bid(mDriverCarInfo, model, MY_PRICE);
mFirebaseDatabaseReference.child(CHILD_TRIPS)
//here, I want to update the bidding to this trip, but
//I can't get the uid of the trip, unless I had
//manually recorded at the time of pushing the trip
.child(model.getUid())
.child("bids").push().setValue(bidAtReserved);
}
});
}
};
我不確定自己要完成什么(相關JSON的摘要-作為文本,而不是屏幕截圖-會有所幫助)。 但是我最好的猜測是您正在尋找getRef()
。
protected void populateViewHolder(TripViewHolder viewHolder, final Trip model, final int position) {
viewHolder.btnTakeNow.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
mFirebaseAdapter.getRef(position).child("price").setValue(MY_PRICE);
}
});
}
FirebaseRecylerAdapter具有一個名為parseSnapShot的替代,您可以像這樣掛鈎。 我沒有更好的解決方案-希望有人可以提供更好的解決方案。
mFirebaseAdapter = new FirebaseRecyclerAdapter<Trip,
TripViewHolder>(
Trip.class,
R.layout.item_message,
TripViewHolder.class,
mFirebaseDatabaseReference.child(CHILD_TRIPS)) {
@Override
protected Trip parseSnapshot(DataSnapshot snapshot) {
Trip trip = super.parseSnapshot(snapshot);
trip.setDbKey(snapshot.getKey());
return trip;
}
@Override
protected void populateViewHolder(TripViewHolder viewHolder, final Trip model, int position) {
viewHolder.btnTakeNow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Bid bidAtReserved = new Bid(mDriverCarInfo, model, MY_PRICE);
mFirebaseDatabaseReference.child(CHILD_TRIPS)
//here, I want to update the bidding to this trip, but I can't get the uid of the trip, unless I had manually recorded at the time of pushing the trip
.child(model.getUid())
.child("bids").push().setValue(bidAtReserved);
}
});
}
};
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