type 'bool' is not a subtype of type 'List<ternakModel> in a type cast - flutter

Question

I have problem in the emulator android. type 'bool' is not a subtype of type 'List in a type cast. I can't solve of this. I use provider ListBuilder. so I'm retrieving data using the provider in the form of a list. Can you help?
#override
void initState() {
super.initState();
}
#override
Widget build(BuildContext context) {
TernakProvider ternakProvider = Provider.of<TernakProvider>(context);
return Consumer<TernakProvider>(
builder: (context, providerData, _) => FutureBuilder(
future: providerData.getTernak(),
builder: (context, snapshot) {
if (snapshot.connectionState != ConnectionState.done) {
return Text("Loading...");
}
List<ternakModel> ternak = snapshot.data as List<ternakModel>;
and this is file provider
class TernakProvider with ChangeNotifier {
List<ternakModel> _ternak = [];
List<ternakModel> get ternak => _ternak;
set ternak(List<ternakModel> ternak) {
_ternak = ternak;
notifyListeners();
}
Future<bool> getTernak() async {
try {
List<ternakModel> ternak = await TernakService().getTernak();
_ternak = ternak;
return true;
} catch (e) {
print(e);
return false;
}
}
}
and this is my service file
class TernakService {
String baseUrl = "BaseURL";
Future getTernak() async {
var url = Uri.parse("$baseUrl/api/ternak");
var response = await http.get(url);
print(response.body);
if (response.statusCode == 200) {
List data = jsonDecode(response.body)['data']['list'];
List<ternakModel> ternak = [];
for (var item in data) {
ternak.add(ternakModel.fromJson(item));
}
return ternak;
} else {
throw Exception('Gagal Get Ternak');
}
}
}
this is listview code
body: ListView.builder(
itemCount: ternak.length,
itemBuilder: (context, index) {
return Center(
child: GestureDetector(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
const DetailTernak(),
settings: RouteSettings(
arguments:
ternak[index].id_ternak.toString(),
),
),
);
},
// width: MediaQuery.of(context).size.width / 0.5,
// margin: const EdgeInsets.only(left: 16),
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Container(
width: MediaQuery.of(context)
.size
.width /
1.2,
margin: EdgeInsets.only(
left: 16,
right: 16,
top: 10,
bottom: 10),
decoration: BoxDecoration(
borderRadius:
BorderRadius.circular(10),
border: Border.all(
color: const Color(0xffE5E5E5),
width: 1,
),
boxShadow: [
BoxShadow(
blurStyle: BlurStyle.outer,
color: Colors.black
.withOpacity(0.1),
spreadRadius: 0,
blurRadius: 8,
offset: const Offset(0,
0), // changes position of shadow
),
],
),
child: Column(
crossAxisAlignment:
CrossAxisAlignment.start,
children: <Widget>[
Row(
mainAxisAlignment:
MainAxisAlignment
.spaceBetween,
children: <Widget>[
Container(
margin: EdgeInsets.only(
left: 15, top: 15),
child: Row(
children: [
Text(
"ID ",
style: regular
.copyWith(
color: Color(
0xFF646464),
),
),
Text(
"${ternak[index].id_ternak}",
style: semibold,
)
],
),
),
]),

Answer 1

Change your getTernak inside TernakProvider to this:
Future<List<ternakModel>> getTernak() async {
try {
List<ternakModel> ternak = await TernakService().getTernak();
_ternak = ternak;
return ternak;
} catch (e) {
print(e);
return [];
}
}