[英]C# net core Odata web api json format exception
I would like to return an entity (“Question5Point1”) with a collection of complex objects from C# net 5 web api.我想返回一个实体(“Question5Point1”),其中包含来自 C# net 5 web api 的复杂对象集合。 My problem is, that my json result is cut at the beginning of the complex object.
我的问题是,我的 json 结果在复杂 object 的开头被剪切。 It's looks like that:
它看起来像这样:
My metadata looks like that:我的元数据如下所示:
My code looks like that:我的代码如下所示:
The result would be:结果将是:
Every field/attribute is filled.每个字段/属性都已填充。 Why this error happens and what can i do against it?
为什么会发生此错误,我该怎么做? In the output of debugging, I see this exception:
在output的调试中,我看到了这个异常:
Microsoft.OData.ODataException: An internal error 'EdmLibraryExtensions_ToTypeReference' occurred.
at Microsoft.OData.Metadata.EdmLibraryExtensions.ToTypeReference(IEdmType type, Boolean nullable)
at Microsoft.OData.Metadata.EdmLibraryExtensions.ToTypeReference(IEdmType type)
at Microsoft.OData.TypeNameOracle.ResolveAndValidateTypeFromTypeName(IEdmModel model, IEdmStructuredType expectedType, String typeName, IWriterValidator writerValidator)
at Microsoft.OData.ODataWriterCore.GetResourceType(ODataResourceBase resource)
at Microsoft.OData.ODataWriterCore.ValidateResourceForResourceSet(ODataResourceBase resource, ResourceBaseScope resourceScope)
at Microsoft.OData.ODataWriterCore.<>c__DisplayClass121_0.<WriteStartResourceImplementation>b__0()
at Microsoft.OData.ODataWriterCore.InterceptException(Action action)
at Microsoft.OData.ODataWriterCore.WriteStartResourceImplementation(ODataResource resource)
at Microsoft.OData.ODataWriterCore.<>c__DisplayClass49_0.<WriteStartAsync>b__0()
at Microsoft.OData.TaskUtils.GetTaskForSynchronousOperation(Action synchronousOperation)
--- End of stack trace from previous location ---
at Microsoft.AspNet.OData.Formatter.Serialization.ODataResourceSerializer.WriteResourceAsync(Object graph, ODataWriter writer, ODataSerializerContext writeContext, IEdmTypeReference expectedType)
at Microsoft.AspNet.OData.Formatter.Serialization.ODataResourceSetSerializer.WriteResourceSetAsync(IEnumerable enumerable, IEdmTypeReference resourceSetType, ODataWriter writer, ODataSerializerContext writeContext)
at Microsoft.AspNet.OData.Formatter.Serialization.ODataResourceSerializer.WriteComplexAndExpandedNavigationPropertyAsync(IEdmProperty edmProperty, SelectItem selectItem, ResourceContext resourceContext, ODataWriter writer)
at Microsoft.AspNet.OData.Formatter.Serialization.ODataResourceSerializer.WriteComplexPropertiesAsync(SelectExpandNode selectExpandNode, ResourceContext resourceContext, ODataWriter writer)
at Microsoft.AspNet.OData.Formatter.Serialization.ODataResourceSerializer.WriteResourceAsync(Object graph, ODataWriter writer, ODataSerializerContext writeContext, IEdmTypeReference expectedType)
at Microsoft.AspNet.OData.Formatter.Serialization.ODataResourceSerializer.WriteObjectAsync(Object graph, Type type, ODataMessageWriter messageWriter, ODataSerializerContext writeContext)
at Microsoft.AspNet.OData.Formatter.ODataOutputFormatterHelper.WriteToStreamAsync(Type type, Object value, IEdmModel model, ODataVersion version, Uri baseAddress, MediaTypeHeaderValue contentType, IWebApiUrlHelper internaUrlHelper, IWebApiRequestMessage internalRequest, IWebApiHeaders internalRequestHeaders, Func`2 getODataMessageWrapper, Func`2 getEdmTypeSerializer, Func`2 getODataPayloadSerializer, Func`1 getODataSerializerContext)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|29_0[TFilter,TFilterAsync](ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters()
--- End of stack trace from previous location ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Builder.RouterMiddleware.Invoke(HttpContext httpContext)
at Microsoft.AspNet.OData.Batch.ODataBatchMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContextOfT`1.ProcessRequestAsync()
I had same issue with a list of navigation properties, make sure your Key(s) are unique, I had null in Key, so json has been cut.我在导航属性列表中遇到了同样的问题,请确保您的密钥是唯一的,我在密钥中有 null,因此 json 已被剪切。
This error happened to me when I had two OData controllers that returned two different data types that contained a inner class with the same name :当我有两个 OData 控制器返回两个不同的数据类型,其中包含同名的内部 class 时,这个错误发生在我身上:
public class OEntity
{
[Key]
public int Id { get; set; }
public string Name { get; set; }
...
public Day[] Days { get; set; }
// Daily information related to this entity
public class Day
{
public DateTime Date { get; set; }
public double Deposit { get; set; }
...
}
}
public class OCost
{
[Key]
public int Id { get; set; }
public double TotalCost { get; set; }
public string Currency { get; set; }
...
public Day[] Days { get; set; }
// Causes "internal error 'EdmLibraryExtensions_ToTypeReference'"
// in the OEntity controller. Must rename!
public class Day
{
public DateTime Date { get; set; }
public double Cost { get; set; }
}
}
So be sure that none of your data classes have the same name.因此,请确保您的所有数据类都没有相同的名称。
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