I have this post request to my api that needs an array of json objects like :

[{ 
   "x": 1,
   "y": 1
}]

My function:

Future<String> deleteObstacle(String server, int x, int y) async {
    final response =
        await http.delete(Uri.parse('$server/admin/obstacles/'), headers: {
      "Accept": "application/json",
      "Access-Control-Allow-Origin": "*"
    }, body: [
      jsonEncode(<String, int>{"x": x, "y": y})
    ]);
    if (response.statusCode == 200) {
      Map<String, dynamic> launchResponse = jsonDecode(response.body);
      return launchResponse['response'];
    } else {
      throw Exception("ERROR Attempting to Delete obstacle");
    }
  }

}

Throws error:

"Expected a value of type 'int', but got one of type 'String'

Im not sure how to map that body and ive tried an array of things. What approach is better?

Edit:

Full stack trace here

CodePudding user response：

Try to add this

    [{ 
   "x": 1 **as** *int*,
   "y": 1 **as** *int*
}]

It tells Flutter what type of data you're inserting. Works for me.

CodePudding user response：

Where exactly is the error? Is it in the body request? If its, try this for the body part. Hope its help you

 Map<String, int> body = <String, int>{
      'x'      : x,
      'y'      : y,
 };
  final response =
        await http.delete(Uri.parse('$server/admin/obstacles/'), headers: {
      "Accept": "application/json",
      "Access-Control-Allow-Origin": "*"
    }, body: jsonEncode(body)
 
  );