Updating items in Firestore using Flutter-CodePudding

I am making a friend req type Functionality So if I tap on add friend button the name of Current Logged in person should be added to the request list of person named I searched.

Firestore Structure

So from my app when I click on add friend button, let say current logged in user is '[email protected]' and I search for '[email protected]' then '[email protected]' user name should be added in the requests array of the person '[email protected]'.

This is my search method to search a user

void onSearch() async {
    await _firestore
        .collection("users")
        .where("email", isEqualTo: _search.text)
        .get()
        .then((value) {
      setState(() {
        userMap = value.docs[0].data();
      });
    });
  }

What should I write in addUser method ?

void addUser() async {
    await _firestore
            .collection("users")
            .where("email", isEqualTo: _search.text)
            .get()
           ;
  }

CodePudding user response：

To learn how to add items to and remove items from an array, see the Firebase documentation on updating an array. To learn how to update all documents that match a query, see How to get the document ref to a where clause firestore?