How to create user model with nested map field for cloud firestore with flutter?

Question

I want to create a nested field with the type of map. 'usersName' is the field that has the type of map, contain 'firstName' and 'lastName' . Here is the image: If you need a source code, tell me. Thank you

user_model.dart

class User {
  String id;
  String name;
  String email;
  String password;
  String phone;

  User({
    required this.id,
    required this.name,
    required this.email,
    required this.password,
    required this.phone,
  });

  //and i dont know how to make it work
}

Answer 1

Do this change and you will be able to receive it as you want:

class User {
  String id;
  Map<String, String> name;
  String email;
  String password;
  String phone;

  User({
    required this.id,
    required this.name,
    required this.email,
    required this.password,
    required this.phone,
  });

  //and i dont know how to make it work
}

More information on dart Maps: https://dart.dev/guides/language/language-tour#maps

Answer 2

You can create a UserName class with firstName and lastName variables and then on your User class you change your name from String to UserName .

class User {
 String id;
 UserName name;
 String email;
 String password;
 String phone;

 User({
   required this.id,
   required this.name,
   required this.email,
   required this.password,
   required this.phone,
 });
}

class UserName {
   String firstName;
   String lastName;
   UserName({
      required this.firstName,
      required this.lastName,
   });
}

Answer 3

I agree that setting the name property as Map is the way to go. For example, you have your user name as follow:

var name = {firstName: "Joe", lastName: "Smith"}

Create your User class as above then create method to convert your properties accordingly. Here I created toMap() to return a Map object of the User.

class User {
  String id;
  Map<String, String> name;
  String email;
  String password;
  String phone;

  User({
    required this.id,
    required this.name,
    required this.email,
    required this.password,
    required this.phone,
  });

  // if you intend to store this User object into a database/storage
  // that requires Map object
   Map<String, dynamic> toMap() {
    // convert Map to String
    var fullName = name.toString();
  
    return {
      'id': id,
      // String key, String value
      'name': fullName,
      ...
    };
  }

}