Flutter 对文档数组字段的firestore查询

Question

I've got this firestore database.

There is a 'users' collection containing documents of users. Each user has their own information such as name and a cart. I would like to get all the 'carts' of a particular user in a stream. How would you go about with the query?

Answer 1

await FirebaseFirestore.instance.Collection("users").doc("docIdHere").get().then((. 
document) {
//it will get the first item in the cart with index zero
document.get("cart")[0];
//then do what you want
});