Push objects into array in Dart

Question

  List returnMovies = [];

Future<List> _getData() async {

    final response = await http.get("https:../getTodayMovies",
        headers: {HttpHeaders.AUTHORIZATION: Acess_Token.access_token});


    if (response.body != null) {
    returnMovies = json.decode(response.body);
      .....

      setState(() {});
    } else {
       final responseUpcoming = await http.get("/upcoming",
        headers: {HttpHeaders.AUTHORIZATION: Acess_Token.access_token});
        returnMovies = json.decode(responseUpcoming.body);


    }

The response.body looks like:

[{"id":394470548,"host_group_name":"heyab redda","movie_image":"..png","type":"horror","code":"X123","name":"Lovely","start_time":1554364800,"end_time":1554393600,"}]

The responseUpcoming.body looks like:

 {"id":394470545,"host_group_name":"foo redda","movie_image":".png","type":"horror","code":"X123","name":"Lovely","start_time":1554364800,"end_time":1554393600,"}, {"id":394470548,"host_group_name":"foo1 redda","movie_image":"..png","type":"comic","code":"X125","name":"Lovely1","start_time":1554364800,"end_time":1554393600,"}

The error I get is: String, dynamic is not a subtype of type List<dynamic>.

In the first API call that I am doing I normally get in return an array of objects, however, when this is empty, the second API call returns a list of objects that I want to push into the array called returnMovies, how can I achieve this?? Is there any way to .push these objects in the array?? So then I want to use this array to build dynamically a Listview.builder. Also is it correct the way I am declaring it? I am quite new on Dart. Thank you

Günter Zöchbauer · Accepted Answer · 2019-02-18 15:21:03Z

13

Sounds like you are looking for addAll

returnMovies.addAll(json.decode(returnUpcoming.body))

answered Feb 18, 2019 at 15:21

Günter Zöchbauer

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3 Comments

heyr Over a year ago

Yes I actually do, however, I get error: <String, dynamic>' is not a subtype of type 'Iterable<dynamic>.

Günter Zöchbauer Over a year ago

You can't add a Map (key-value pairs) to an Iterable (list of values). You would need to provide more details what you want to accomplish (how the data in returnMovies and returnUpcoming.body looks like exactly and what the resulting returnMovies should look like)

heyr Over a year ago

I just edited my post, with the potential response of my API call and how I would like to use its data, thanks.

Günter Zöchbauer · Accepted Answer · 2019-02-18 15:28:39Z

5

I will suggest to use

returnMovies.addAll({your object here})

edited Feb 18, 2019 at 15:28

Günter Zöchbauer

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answered Feb 18, 2019 at 15:26

Mohamed hassan kadri

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Comments

dmarquina · Accepted Answer · 2019-02-18 15:46:53Z

2

When you do this json.decode(response.body) you are getting a List of Map you should use List<dynamic> movieListData and get the items like this:

    movieListData = json.decode(response.body);
    returnMovies = movieListData.map((dynamic movieData) {
          String id = movieData['_id'];
          String host_group_name = movieData['host_group_name'];
          String duration = movieData['duration'];
          return new Movie(id,title, duration);
        }).toList();

edited Feb 18, 2019 at 15:46

answered Feb 18, 2019 at 15:38

dmarquina

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