How can i use it with Future<List<User>>?

[weiddolo]

Hi, in the example here (https://pub.dev/packages/filter_list/example) uses a list defined in the code. How can I use the plugin with with a Future<List> downloaded from online JSON?

[TheAlphamerc]

@weiddolo once you receive list from online JSON, you just need to pass this list to filter model. For reference check how it is done in example https://github.com/TheAlphamerc/flutter_plugin_filter_list/blob/f6a61b5fbe3de4c5dd519b1fd679140e806383a4/example/lib/main.dart#L72

[weiddolo]

Thank you for reply. I tried adding this:

class _MyHomePageState extends State<MyHomePage> {
  List<User>? selectedUserList = [];
  late Future<User> futureUserList;

  Future<User> fetchUserlist() async {
    final response = await http.get(Uri.parse('https://jsonplaceholder.typicode.com/posts'));

    if (response.statusCode == 200) {
      final parsedJson = json.decode(response.body);
      print(parsedJson);

      return parsedJson.map((job) => User.fromJson(job)).toList();
    } else {
      throw Exception('Failed to load album');
    }
  }

  void initState() {
    super.initState();
    futureUserList = fetchUserlist();
  }


  Future<void> openFilterDelegate() async {
    await FilterListDelegate.show<User>(
      context: context,
      list: futureUserList,

[...]

but I have this problem:
Error: A value of type 'Future<User>' can't be assigned to a variable of type 'List<User>'

[TheAlphamerc]

fetchUserlist is a asynchronous function so you need to call it asynchronously.

class _MyHomePageState extends State<MyHomePage> {
  List<User>? selectedUserList = [];
  late Future<User> futureUserList;

  Future<User> fetchUserlist() async {
    final response = await http.get(Uri.parse('https://jsonplaceholder.typicode.com/posts'));

    if (response.statusCode == 200) {
      final parsedJson = json.decode(response.body);
      print(parsedJson);

      return parsedJson.map((job) => User.fromJson(job)).toList();
    } else {
      throw Exception('Failed to load album');
    }
  }

  void initState() {
    super.initState();
    getUserListFromServer();
  }

 void getUserListFromServer() async {
     futureUserList = await fetchUserlist();
}



  Future<void> openFilterDelegate() async {
    await FilterListDelegate.show<User>(
      context: context,
      list: futureUserList,

[weiddolo]

Thank you!

Can you help me with this question: If my json list is the following , but in dialog filter I want to show only the "category" item without duplicates?

{
"id": "1",
"title": "Title 1",
"category": "Category 1",
},
{
"id": "2",
"title": "Title 2",
"category": "Category 2",
},
{
"id": "3",
"title": "Title 3",
"category": "Category 2",
},

thank you very much