Django rest framework 当我使用PUT方法点击API时，如何解析描述[“详细信息”：请求中的“不支持的媒体类型”]？

我目前正在使用SwiftUI开发一个应用程序

我想更新一个数据库中的一些数据，该数据库访问由ios应用程序中的Django REST Framework生成的端点

当我尝试在Django REST框架中更新（

PUT method

）可浏览页面中的一些数据时，它工作得很好，我可以更新数据，但当我尝试在ios应用程序中执行相同的操作时，它不工作得很好

然后我在控制台中收到一些消息，如下所示：

The response code is 415
The request is: ["detail": Unsupported media type "" in request.]

我如何解决这个问题

---

以下是SwiftUI中的代码：

 func makePutCall(
        pk the_pk:Int,
        field_name the_field_name:String,
        memo the_memo:String
    ) {
        let pk = the_pk
        let endpoint: String = "https://sample.com/api/info/\(pk)/"
        
        guard let url = URL(string: endpoint) else {
            print("Error: cannot create URL")
            return
        }
        var urlRequest = URLRequest(url: url)
        urlRequest.addValue("token xxxxxxxxxxxxxxxxxxx", forHTTPHeaderField: "authorization")
        urlRequest.httpMethod = "PUT"
        urlRequest.httpBody = "field_name=\(the_field_name)&memo=\(the_memo)".data(using: .utf8)
        let session = URLSession.shared
        let task = session.dataTask(with: urlRequest) {
            (data, response, error) in
            guard error == nil else {
                print("error calling PUT")
                print(error!)
                return
            }
            guard let responseData = data else {
                print("Error: did not receive data")
                return
            }
            guard let response = response as? HTTPURLResponse else {
                print("Error: did not response data")
                return
            }
            print("The response code is \(response.statusCode)")
            do {
                guard let receivedData = try JSONSerialization.jsonObject(with: responseData,
                                                                          options: []) as? [String: Any] else {
                    print("Could not get JSON from responseData as dictionary")
                    return
                }
                print("The request is: " + receivedData.description)
                
            } catch  {
                print("error parsing response from PUT")
                return
            }
        }
        task.resume()
    }

---

已更新：

我试图添加一些代码来设置

内容类型

，如下所示，然后错误消息已更改，但我仍然无法更新某些数据

  ...
  var urlRequest = URLRequest(url: url)
  urlRequest.addValue("token xxxxxxxxxxxxxxxx", forHTTPHeaderField: "authorization")
  urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type") //←I added this line
  urlRequest.httpMethod = "PUT"
  ...

以下是按摩：

The response code is 400
The request is: ["detail": JSON parse error - Expecting value: line 1 column 1 (char 0)]

---

Xcode:12.0.1版

Djangorest框架：3.12.1

---

Django:3.1.2

您发送的数据未正确格式化为json对象，这会导致错误。请尝试在请求中发送的数据中查找语法错误。

尝试输出请求中发送的值。确保它遵循JSON格式，并且JSON数据中没有尾随逗号。

我将HTTP正文更改为数组数据，然后它就可以正常工作了。