Question

尝试在一个请求中保存实体及其关联时遇到问题。

我正在尝试执行以下操作：

   var myModel = manager.createEntity('MyModel', {
            type: 1,
            attributes: [
                { name: 'one', value: '1', active: true },
                { name: 'two', value: '2', active: true }
            ]
    });
    manager.addEntity(myModel);
    manager.saveChanges().then(function(response) {}).fail(function(e){
        console.log(e.message)
    });

在.NET MVC控制器上，我有类似的东西：

[HttpPost]
public SaveResult SaveChanges(JObject saveBundle)
{
    var rtn = _contextProvider.SaveChanges(saveBundle);
    return rtn;
}

在完成序列化rtn变量并将其返回给客户端之前，一切正常。我收到以下错误：

exceptionMessage: "The 'ObjectContent`1' type failed to serialize the response body for content type 'application/json; charset=utf-8'."
exceptionType: "System.InvalidOperationException"
innerException: {message: "An error has occurred.",…}
exceptionMessage: "Self referencing loop detected for property 'myModel' with type 'MyApp.Models.MyModel'. Path 'entities[0].attributes[0]'."
exceptionType: "Newtonsoft.Json.JsonSerializationException"
message: "An error has occurred."
stackTrace: "   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.CheckForCircularReference(JsonWriter writer, Object value, JsonProperty property, JsonContract contract, JsonContainerContract containerContract, JsonProperty containerProperty)
↵   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.CalculatePropertyValues(JsonWriter writer, Object value, JsonContainerContract contract, JsonProperty member, JsonProperty property, JsonContract& memberContract, Object& memberValue)
↵   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
↵   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)
↵   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
↵   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)
↵   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
↵   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)
↵   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
↵   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)
↵   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)
↵   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)
↵   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)
↵   at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType)
↵   at Newtonsoft.Json.JsonSerializer.Serialize(JsonWriter jsonWriter, Object value)
↵   at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding)
↵   at System.Net.Http.Formatting.JsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding)
↵   at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, HttpContent content)
↵   at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync(Type type, Object value, Stream writeStream, HttpContent content, TransportContext transportContext, CancellationToken cancellationToken)
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
↵   at System.Web.Http.WebHost.HttpControllerHandler.<WriteBufferedResponseContentAsync>d__1b.MoveNext()"
message: "An error has occurred."
stackTrace: null

这是因为子attributes具有对其父级的引用，并且由于父级包含它们，因此父级最终具有循环引用。

我认为Breeze会处理这个问题，但可能没有。

我做错了吗？

Answer 1

否认！我错过了[BreezeController]装饰。

微风 - 拯救实体和协会

1 个答案: