How to convert list into map form and get result like this?

Question

How to convert a list into map form and get results like this:

{"data":[{"id_pet":"63","id_habit":0},{"id_pet":"64","id_habbit":0}]}

My code:

event.listPet.asMap();

My list:

↓   pet: List (2 items)
  ↓ [0]: Pet
    id_pet: 1
    id_habbit: 1
  ↓ [1]: Pet
    id_pet: 2
    id_habbit: 2

Answer 1

return {"data": event.listPet.map((e) => e.toMap()).toList(),};

You should make sure toMap method is defined in your Pet class.

Answer 2

use fromIterable

Map<String, dynamic> map1 = {
    "id_pet":"63",
    "id_habit": 0
  };
  
   Map<String, dynamic> map2 = {
    "id_pet":"64",
    "id_habit": 0
  };
  List<Map<String, dynamic>> list = [];
    
  list.add(map1);
  list.add(map2);
  
  var map3 = Map.fromIterable(list, key: (e) => "data", value: (e) => list);
  print(map3);