How can I do multiple object pushes at once with angularfire2?
Just pushing an array of objects doesn't set keys for each object.
this.af.database.list('/symbols/').push({
typ: "symbol1",
// ....
});
this.af.database.list('/symbols/').push({
typ: "symbol2",
// ....
});
With the regular Firebase JavaScript SDK, you can accomplish this with:
var updates = {};
updates['/symbols/'+ref.push().key] = {
typ :"symbol1", ....
};
updates['/symbols/'+ref.push().key] = {
typ :"symbol2", ....
};
ref.update(updates);
Since AngularFire2 is built on top of the normal Firebase JavaScript SDK, they interop perfectly. So you can just use the Firebase JavaScript SDK for this operation.
ref.push().key ?
push is a client-side operation that generates a key that is statistically guaranteed to be unique.
Based on @Frank's answer, improvised it to have a reducer and a promise resolver> Here is the final version:
const admin = require('firebase-admin');
const types = [
{
type: "symbol1"
},
{
type: "symbol2"
}
];
const rootRef = admin.database().ref();
const ref = rootRef.child(`/symbols`);
// prepare updates object based on types array.
let updates = types.reduce((update, type) => {
let id = ref.push().key;
update[`/symbols/${id}`] = type;
return update;
}, {});
await rootRef.update(updates)
.then((response) => {
return res.status(201).json({message: "Records added successfully"});
})
.catch((error)=>{
res.sendStatus(500);
})
