fromMap正在从json响应中分配空值
我试图使用fromJson分配JSON响应dart实体,但返回对象具有所有空值 json如下所示:fromMap正在从json响应中分配空值,json,dart,flutter,Json,Dart,Flutter,我试图使用fromJson分配JSON响应dart实体,但返回对象具有所有空值 json如下所示: { "doc":{ "id":"6496772", "name":"Test Document", } "custom_keys":[ { "key": "X1", "name":"X1" }, { "key": "X2", "nam
{
"doc":{
"id":"6496772",
"name":"Test Document",
}
"custom_keys":[
{
"key": "X1",
"name":"X1"
},
{
"key": "X2",
"name":"X2"
},
]
}
var request = await httpClient.getUrl(Uri.parse(url));
var response = await request.close();
if (response.statusCode == HttpStatus.OK) {
var json = await response.transform(UTF8.decoder).join();
print(json.toString());
var data = JSON.decode(json);
return new Test.fromMap(data['doc']);
我创建了如下测试实体
class Test{
final String id;
final String name;
const Feature({
this.id,
this.name,
});
Feature.fromMap(Map<String, dynamic> map) :
id= map['id'],
name= map['name'];
//从上面的返回语句中获取null对象
有错误消息。有什么问题吗?空对象可能来自
id=map['id'],
,而json只返回“key”和“name”
您必须将每个json元素映射到一个属性。将构造函数更改为
Feature.fromMap(Map<String, dynamic> map) :
id= map['key'],
name= map['name'];
Feature.fromMap(地图地图):
id=map['key'],
name=map['name'];
可能会成功。你找到解决办法了吗?