Making this.id equal to doc.id

Issue

I want to make this.id equal to doc.id or the cont id from the previous function instead of the hardwired value I have in there.

I'm not sure on the correct syntax to get this done.

  addToCart(){
    this.db.firestore.collection('products')
    .where('tagid','==', "049a1092285e80")
    .get()
    .then(querySnapshot => {
            querySnapshot.forEach(function (doc) {
              const id = doc.id;
              //const data = doc.data;

                  console.log("debug 1  ",doc.id); // id of doc
                  console.log("debug 2  ", doc.data()); // data of doc
                  console.log("debug 3", id);
                  //return {id};
            }) // end of for each

            // want to make this.id = doc.id 
            this.id = "KCSx3JPeoerFmeH5zW7R";
                  this.productService.getOneProduct(this.id).subscribe(res => {
                  this.product = res;
                  this.product.id = this.id;
                  this.amount = this.cartService.getItemCount(this.id);
                  console.log('tag id', this.product.tagid);

                  this.cartService.addProduct(this.product);
                });
     });
  }

Solution

Good day!

Just use the arrow function to save context and modify id property:

querySnapshot.forEach(doc => { this.id = doc.id; }) 

Answered By - AlexanderFSP