Dio抛出链接的哈希图 不是字符串的子类型

Question

我正在尝试将dio集成到我的应用中。我可以通过http包调用api，但是由于dio的高级功能，我正朝dio而不是http

迈进

这是我使用http的代码

 var body = <String, dynamic>{
      doctorAccountEnabledKey: "false",
      doctorAccountTypeKey: "doctor",
      doctorEmailKey: email,
      doctorPasswordKey: password,
      doctorPhoneNumberKey: phoneNumber,
      doctorGenderKey: gender,
      doctorDobKey: dob,
      doctorNameKey: {
        doctorFirstNameKey: firstName,
        doctorLastNameKey: lastName,
        doctorMiddleNameKey: middleName,
        doctorPrefixKey: prefix,
        doctorSuffixKey: suffix
      }
    };
    final response = await http.post(
      doctorSignUpUrl,
      body: jsonEncode(body),
      headers: {"Content-Type": "application/json"},
    );

代码工作正常，但是当我使用dio

var body = <String, dynamic>{
      doctorAccountEnabledKey: "false",
      doctorAccountTypeKey: "doctor",
      doctorEmailKey: email,
      doctorPasswordKey: password,
      doctorPhoneNumberKey: phoneNumber,
      doctorGenderKey: gender,
      doctorDobKey: dob,
      doctorNameKey: {
        doctorFirstNameKey: firstName,
        doctorLastNameKey: lastName,
        doctorMiddleNameKey: middleName,
        doctorPrefixKey: prefix,
        doctorSuffixKey: suffix
      }
    };
    final response = await Dio().post(
      doctorSignUpUrl,
      data: jsonEncode(body),
      options: Options(contentType: "application/json")
    );

以上代码抛出错误，提示LinkedHashMap<String,dynamic> is not subtype of String我也尝试了以下]

 data: json.encode(body),

data: body,

Answer 1

我复制了您的代码，并用双引号将所有键括起来，问题消失了。我将仔细检查并确保所有键都用双引号定义，或者至少在分配值并仔细查看后打印正文。这是我所拥有的，运行正常：

var body = <String, dynamic>{
      "doctorAccountEnabledKey": false,
      "doctorAccountTypeKey": "doctor",
      "doctorEmailKey": "email",
      "doctorPasswordKey": "password",
      "doctorPhoneNumberKey": "phoneNumber",
      "doctorGenderKey": "gender",
      "doctorDobKey": "dob",
      "doctorNameKey": {
        "doctorFirstNameKey": "firstName",
        "doctorLastNameKey": "lastName",
        "doctorMiddleNameKey": "middleName",
        "doctorPrefixKey": "prefix",
        "doctorSuffixKey": "suffix"
      }
    };

    final response = await Dio().post(
        "https://postman-echo.com/post",
        data: jsonEncode(body),
        options: Options(contentType: "application/json")
    );

复制我拥有的代码，并验证它是否可以在您的计算机上运行，​​然后慢慢地将其添加回对其他文件的引用，直到它破裂为止，这样做很值得，这样您可以缩小导致错误的原因。

祝你好运！