Firestore - How to get document id after adding a document to a collection

Question

Is there a way to acquire the document id that was generated after adding a document to a collection?

If I add a document to a collection that represents a \"post\"

Answer 1

As others mentioned also, we can get the document reference once it added. After we get the document reference on the behalf of id, we can update the same

Service.ts file

async funName(data: Data){
      let docRef = this.firestore.collection('table-name').add(data);
      console.log(docRef)
      try {
        const docAdded = await docRef;
        console.log(docAdded.id);
        this.firestore.doc('table-name/' + docAdded.id).update({ id: docAdded.id });
        return docRef;
      }
      catch (err) {
        return err;
      }
    }

component.ts file

async addData(){
    try{
      let res =  await this.dataServ.funName(this.form.value);
      this.snackbar.open('success', 'Success');
    }catch(ex){
      this.disabled = false;
      this.snackbar.open('err', 'Error')
      console.log(ex, 'exception');
    }
  }