How to make model fields observable in Flutter - flutter

Question

I have a model called category , which has two fields, User has a list of categories and what to update the category name, for State Management getx is used
class Category {
String? categoryName;
bool status;
Category(this.categoryName,this.status);
}
I have a observable list called catList which is used in List widget
var catList = <Category>[].obs;
when I update the category field it doest not update
catList[index].categoryName = categoryChangedName.value;
but If I update the item in object and then assign the object to catList then It changed
catList[index] = Category(categoryChangedName.value, catList[index].status );
My question is how to make model fields observable, if we have more fields changes then this is not proper way.

Answer 1

As of GetX documentation you need to update values using method and call update(); method inside custom object !
Ex:
class Controller extends GetxController {
int counter = 0;
void increment() {
counter++;
update(); // look here!
}
}
Your use case might be like....
class Category {
String? categoryName;
bool status;
Category(this.categoryName,this.status);
void updateCategoryName(name){
this.categoryName = name;
update();
}
}
//Use like..
catList[index].updateCaetgoryName = categoryChangedName.value;