Azure devops TFS Online API V1.0中接收到“可为null的对象必须有值”异常
一个多月以来，我一直在使用代码向Visual Studio Online添加工作项，并使用v1.0 Preview 2 API进行工作项跟踪，现在似乎有什么东西破坏了我对API的使用，因为它不再在预览中。更新运行之前发送的JSON相同。发送的数据是：Azure devops TFS Online API V1.0中接收到“可为null的对象必须有值”异常,azure-devops,tfs-workitem,Azure Devops,Tfs Workitem,一个多月以来，我一直在使用代码向Visual Studio Online添加工作项，并使用v1.0 Preview 2 API进行工作项跟踪，现在似乎有什么东西破坏了我对API的使用，因为它不再在预览中。更新运行之前发送的JSON相同。发送的数据是： [{"op":"add","path":"/fields/System.Title","value":"dev task"},{"op":"add","path":"/fields/System.IterationPath","value":"Va
[{"op":"add","path":"/fields/System.Title","value":"dev task"},{"op":"add","path":"/fields/System.IterationPath","value":"Valid Iteration Path"},{"op":"add","path":"/fields/Microsoft.VSTS.Common.Activity","value":"Development"},{"op":"add","path":"/relations/-","value":{"rel":"System.LinkTypes.Hierarchy-Reverse","url":"https://myurl.visualstudio.com/DefaultCollection/_apis/wit/workItems/2722","attributes":{"comments":"Added sub task"}}},{"op":"add","path":"/fields/System.AssignedTo","value":"Valid User"}]
{"$id":"1","innerException":null,"message":"Nullable object must have a value.","typeName":"System.InvalidOperationException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089","typeKey":"InvalidOperationException","errorCode":0,"eventId":0}