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ViewsAngular & Firebase Realtime-Database. How to get child knowing its id property but without knowing its parent node
My Database is like this
I can get to cart part on my own and I can even delete the product from cart.. if I type in the auto generated id manually.. Honestly, I have been trying to do this for 2 days now. I researched every stackoverflow question related to firebase database but I still couldn't figure it out.
I get to cart like this: firebase.database().ref('/' + account[0] + '_user' + '/cart')
But I can't go further.. assume that I am also providing product that needs to get deleted and you can access its id through item.id
Right now if you click on delete button the whole cart gets deleted.
1 answers
Answer question0
If you know the product/id property of the node to delete, you can use a query to order/filter the nodes and find the key of the one(s) you want to delete:
const cartRef = firebase.database().ref('/' + account[0] + '_user' + '/cart');
const itemQuery = cartRef.orderByChild("product/id").equalTo(3);
itemQuery.get().then((snapshot) => {
snapshot.forEach((productSnapshot) => {
console.log(productSnapshot.key, productSnapshot.child("product/id").val());
})
}).catch((error) => {
console.error(error);
})