Can't Delete Node of Firebase Database

JavaScript
1

I call the function to delete as follows:

<div *ngFor="let out of cart_checkouts">
<button type="button" (click)="RemoveCheckoutRecord(out.checkoutID)">Delete</button>
</div>

This executes the following function:

RemoveCheckoutRecord(rowID) {
this.firestore.doc('cart_checkouts/' + rowID).delete();
}

I’ve also tried:

RemoveCheckoutRecord(rowID) {
var db = firebase.database();
var ref = db.ref("cart_checkouts");
ref.child(rowID).remove();
}

Neither one of the functions throw an error; they simply don’t work. The preceding two functions seem to just be for collections and this is a node on a realtime database not a collection.

2

The following works to delete the node -MRGk9sayjVDB8F15TM3 but I need it to delete by checkoutID because I can’t reference the nodes by their keys.

var db = firebase.database();
var ref = db.ref("cart_checkouts/-MRGk9sayjVDB8F15TM3");
ref.remove();
3

I’m trying to get my realtime database keys with the following code:


constructor(private db: AngularFireDatabase,){}

RemoveCheckoutRecord() {
this.db.list('cart_checkouts').valueChanges()
.subscribe(result => {
for (const res of result){
console.log("result key " + result.payload.key);
}
});
}

I get the error: Property ‘payload’ does not exist on type ‘unknown’.

How can I fix this?

4

Hey there,

I have no experience with Angular. So, if the issue is there, I will not find it. Also, I might be behind what you are doing, but to debug, it might be helpful to collect the promise from the .remove method:

ref.remove()
  .then(function() {
    console.log("Remove succeeded.")
  })
  .catch(function(error) {
    console.log("Remove failed: " + error.message)
  });

It is difficult to tell without being able to see the shape of your data, but I would imagine the best way to go about doing what you are trying is:

  • Query database with the checkoutID
  • Use .remove on returned Ref

Otherwise, this looks like a typo:

for (const res of result){
console.log("result key " + result.payload.key);
// Should be 'res.payload.key' ??
}

Hope some of this helps

5

Thank you, Sky020 This post must be at least 20 characters so am adding this filler.

6

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