摘要: 微软动态CRM专家罗勇 ，回复323或者20190421可方便获取本文，同时可以在第一间得到我发布的最新博文信息，follow me！
碰到如下报错：
- message: "An error occurred while validating input parameters: Microsoft.OData.ODataException: An undeclared property 'new_returnrequest' which only has property annotations in the payload but no property value was found in the payload. In OData, only declared navigation properties and declared named streams can be represented as properties without values. ↵ at Microsoft.OData.JsonLight.ODataJsonLightResourceDeserializer.ReadUndeclaredProperty(IODataJsonLightReaderResourceState resourceState, String propertyName, Boolean propertyWithValue) ↵ at Microsoft.OData.JsonLight.ODataJsonLightResourceDeserializer.ReadPropertyWithoutValue(IODataJsonLightReaderResourceState resourceState, String propertyName) ↵ at Microsoft.OData.JsonLight.ODataJsonLightResourceDeserializer.<>c__DisplayClass4_0.<ReadResourceContent>b__0(PropertyParsingResult propertyParsingResult, String propertyName) ↵ at Microsoft.OData.JsonLight.ODataJsonLightDeserializer.ProcessProperty(PropertyAndAnnotationCollector propertyAndAnnotationCollector, Func`2 readPropertyAnnotationValue, Action`2 handleProperty) ↵ at Microsoft.OData.JsonLight.ODataJsonLightResourceDeserializer.ReadResourceContent(IODataJsonLightReaderResourceState resourceState) ↵ at Microsoft.OData.JsonLight.ODataJsonLightReader.ReadResourceStart(PropertyAndAnnotationCollector propertyAndAnnotationCollector, SelectedPropertiesNode selectedProperties) ↵ at Microsoft.OData.JsonLight.ODataJsonLightReader.ReadAtStartImplementationSynchronously(PropertyAndAnnotationCollector propertyAndAnnotationCollector) ↵ at Microsoft.OData.ODataReaderCore.ReadImplementation() ↵ at Microsoft.OData.ODataReaderCore.InterceptException[T](Func`1 action) ↵ at System.Web.OData.Formatter.Deserialization.ODataReaderExtensions.ReadResourceOrResourceSet(ODataReader reader) ↵ at System.Web.OData.Formatter.Deserialization.ODataResourceDeserializer.Read(ODataMessageReader messageReader, Type type, ODataDeserializerContext readContext) ↵ at System.Web.OData.Formatter.ODataMediaTypeFormatter.ReadFromStream(Type type, Stream readStream, HttpContent content, IFormatterLogger formatterLogger)"
- stacktrace: " at Microsoft.Crm.Extensibility.OData.CrmODataUtilities.ValidateInputParameters(ModelStateDictionary controllerModelState) ↵ at Microsoft.Crm.Extensibility.OData.EntityController.PostEntitySetImplementation(String& entitySetName, EdmEntityObject entityObject) ↵ at Microsoft.PowerApps.CoreFramework.ActivityLoggerExtensions.Execute[TResult](ILogger logger, EventId eventId, ActivityType activityType, Func`1 func, IEnumerable`1 additionalCustomProperties) ↵ at Microsoft.Xrm.Telemetry.XrmTelemetryExtensions.Execute[TResult](ILogger logger, XrmTelemetryActivityType activityType, Func`1 func) ↵ at lambda_method(Closure , Object , Object[] ) ↵ at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters) ↵ at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken) ↵--- End of stack trace from previous location where exception was thrown --- ↵ at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() ↵ at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) ↵ at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext() ↵--- End of stack trace from previous location where exception was thrown --- ↵ at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() ↵ at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) ↵ at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext() ↵--- End of stack trace from previous location where exception was thrown --- ↵ at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() ↵ at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) ↵ at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"
- type: "Microsoft.Crm.CrmHttpException"
很可能是为查找字段赋值有问题，这么排查，下面是一个正确示例
"[email protected]": "/systemusers(" + entityid.replace("{", "").replace("}", "") + ")"
1. 属性名称要加上 @data.bind
2.属性名称中的字段名要用架构名称，而不是和其他字段一样用逻辑名称
3.值以 / 开头
4 值中/ 后面是实体逻辑名称加上 s 或者es，具体查看实体的元数据
5. 值中的guid不要包括 { 和 }
6. 值中的guid要用 ( 和 ) 包含起来。