How to add Document with Custom ID to firestore

Question

Is there any chance to add a document to firestore collection with custom generated id, not the id generated by firestore engine?

Answer 1

To use a custom ID you need to use .set, rather than .add

This creates a document with the ID "LA":

db.collection("cities").doc("LA").set({
    name: "Los Angeles",
    state: "CA",
    country: "USA"
})

This is taken from the official docs here

Answer 2

In case if you are using angularfire,

class Component{
  constructor(private afs: AngularFireStore) {} // imported from @angular/fire/firestore

  addItem() {
    this.afs.collection('[your collection]').doc('[your ID]').set({your: "document"});
  }
}