在 .NET POST API 请求的正文中接收两个不同的可能类型对象-解网

问：

我有这两类：

public class FieldStructure
    {
        public FieldStructure(string name, string type)
        {
                Name = name;
                Type = type;
                NameAsProperty = name.ToLower().Replace(" ", "_");
            
        }

        public FieldStructure() { }

        public string Name { get; set; } = string.Empty;
        public string NameAsProperty { get; set; } = string.Empty;
        public string Type { get; set; } = string.Empty;

    }

    public class FieldStructureRelation : FieldStructure
    {
        public FieldStructureRelation(FieldStructure fieldStructure, string appRelationId, string appRelationName) 
            : base(fieldStructure.Name, fieldStructure.Type)
        {
            this.AppRelationName = appRelationName;
            this.AppRelationId = appRelationId;
        }

        public FieldStructureRelation() { }

        public string AppRelationId { get; set; } = string.Empty;
        public string AppRelationName { get; set; } = string.Empty;
    }

而这个控制器：

[HttpPost("{workspaceId}/add")]
        public async Task<IActionResult> CreateApp([FromBody] AppDTOCreate request, string workspaceId)
        {
            if (request == null) { return BadRequest(); }
             
            //App app = new App() { AppName = request.AppName, Fields = request.Fields};
            //await _appServices.InsertApp(app, workspaceId);
            return Created("Created", true);
        }

这是我应该收到的对象：

public class AppDTOCreate
    {
        public string AppName { get; set; } = string.Empty;
        public List<FieldStructure> Fields { get; set; } = new List<FieldStructure>();
    }

所以，基本上，我想要的只是能够接收一个 JSON 请求，其中包含一个和的列表。我以为这就像做我已经做过的事情一样容易，但是每当我收到请求时，我所看到的代码都是，每当我到达时，它都会擦除和字段，因此它仍然是 .AppDTOCreateFieldStructuresFieldStructureRelationsFieldStructuresFieldStructureRelationAppRelationNameAppRelationIdFieldStructure

这是我用作示例的 JSON：

{
    "AppName":"Prueba",
    "Fields": [
        {
            "Name": "Name",
            "Type": "text"
        },
        {
            "Name": "Active",
            "Type": "boolean"
        },
        {
            "Name": "Total Sales",
            "Type": "decimal"
        },
        {
            "Name": "Cliente",
            "Type": "itemRelation",
            "AppRelationId": "appIdxxxxxx",
            "AppRelationName": "AppNameABC"
        }
    ]
}

如果有人能帮我弄清楚这里出了什么问题，我将不胜感激！

C# asp.net JSON .NET

    AppDTOCreate data = JsonConvert.DeserializeObject<AppDTOCreate>(json);
    
   //test
    data.Fields[2].GetType().ToString(); // "FieldStructure"
    data.Fields[3].GetType().ToString(); // "FieldStructureRelation"

public class DataPropertyConverter : JsonConverter<List<FieldStructure>>
{
    public override List<FieldStructure> ReadJson(JsonReader reader, Type objectType, List<FieldStructure> existingValue, bool hasExistingValue, JsonSerializer serializer)
    {
        var jArray = JArray.Load(reader);
        
        return jArray.Select(jObj=> (FieldStructure) jObj.ToObject(
                              Type.GetType((string)jObj["Type"] == "itemRelation"
                              ? nameof(FieldStructureRelation)
                              : nameof(FieldStructure))))
                              .ToList();
    }

    public override bool CanWrite => false;
    public override void WriteJson(JsonWriter writer, List<FieldStructure> value, JsonSerializer serializer)
    {
        throw new NotImplementedException();
    }
}

修复类

public class AppDTOCreate
{
    public string AppName { get; set; }

    [JsonConverter(typeof(DataPropertyConverter))]
    public List<FieldStructure> Fields { get; set; }
}

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在 .NET POST API 请求的正文中接收两个不同的可能类型对象

Receiving two different possible type objects in the body of a .NET POST API request

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