Dart / Flutter - cannot assign bool value from JSON response

Question

Newbie to Dart/Flutter here struggling with problem while assigning bool valuse from JSON response - bool error is null and I'm getting:

Failed assertion: boolean expression must not be null

I don't know what's going on as the response is decoded properly and there's no problem with other fields (please take look at Logcat output).

this is my JSON:

{
"error:":false,
"id":1,
"name":"test"
}

my Future:

Future<dynamic> fetchData() async {
http.Response response = await http.get(Values.URL, headers: {HttpHeaders.contentTypeHeader: "application/json"});

if (response.statusCode == 200) {
  debugPrint(response.body);

  var body = jsonDecode(response.body);

  bool error = body["error"];
  var id = body["id"];
  var name = body["name"];

  print("bool:" + error.toString());
  print("id:" + id.toString());
  print("name:" + name);

  if (error) {
    print("no error");
  } else {
    print("error");
  }
} else {
  throw Exception("statusCode exception e");
}

and the Logcat output:

I/flutter: {
I/flutter:   "error:":false,
I/flutter:   "id":1,
I/flutter:   "name":"test"
I/flutter: }
I/flutter: bool:null
I/flutter: id:1
I/flutter: name:test
I/flutter: Failed assertion: boolean expression must not be null

Can you please let me know what I am doing wrong here? Any help will be much appreciated! THANK YOU :)

Solution

I'd like to thank Günter Zöchbauer for pointing out my silly mistake in JSON structure:

"error:":false

should be:

"error":false

don't forget to take a break from coding guys... ;)

Comments

[Günter Zöchbauer]

Try bool error = body["error:"]; or is the : in "error:":false, a mistake in the question?

[Matt]

Already tried that - I'm still getting null value...

[Günter Zöchbauer]

Then set a breakpoint at bool error = body["error"]; and investigate body

[Matt]

Oh my my my .... looks like I need a coffe break after spending 7 hours with code :) The problem was a colon im json code.... THANK YOU, Gunter for pointing this out :)

[Ski]

@Matt, please post answers as answer not as a comment, and then accept it (yes you can accept your own answer and this is encouraged) so that question doesn't hang as unanswered.