使用 LINQ 表达式时的 Atlassian SDK InvalidCastException
Atlassian SDK InvalidCastException when using LINQ expressions
让我们首先声明我不是一个非常有经验的开发人员，所以我很可能在这里完全遗漏了一些东西。
我正在 VB .Net 解决方案中实施 Atlassian.NET SDK。大多数情况下一切正常，但当我尝试直接使用 LINQ 提供程序时出现以下错误：
An unhandled exception of type 'System.InvalidCastException' occurred
in Atlassian.Jira.dll
Additional information: Unable to cast object of type
'System.Linq.Expressions.PropertyExpression' to type
'System.Linq.Expressions.ConstantExpression'.
完整异常：
System.InvalidCastException was unhandled HResult=-2147467262
Message=Unable to cast object of type
'System.Linq.Expressions.PropertyExpression' to type
'System.Linq.Expressions.ConstantExpression'. Source=Atlassian.Jira
StackTrace:
at Atlassian.Jira.Linq.JqlExpressionVisitor.GetFieldNameFromBinaryExpression(BinaryExpression
expression) in
c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line
65
at Atlassian.Jira.Linq.JqlExpressionVisitor.ProcessIndexedMemberEqualityOperator(BinaryExpression
expression, Boolean equal) in
c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line
142
at Atlassian.Jira.Linq.JqlExpressionVisitor.ProcessEqualityOperator(BinaryExpression
expression, Boolean equal) in
c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line
136
at Atlassian.Jira.Linq.JqlExpressionVisitor.VisitBinary(BinaryExpression
node) in
c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line
325
at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor
visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at System.Linq.Expressions.ExpressionVisitor.VisitLambda[T](Expression`1
node)
at System.Linq.Expressions.Expression`1.Accept(ExpressionVisitor visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at System.Linq.Expressions.ExpressionVisitor.VisitUnary(UnaryExpression
node)
at System.Linq.Expressions.UnaryExpression.Accept(ExpressionVisitor
visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at System.Linq.Expressions.ExpressionVisitor.VisitArguments(IArgumentProvider
nodes)
at System.Linq.Expressions.ExpressionVisitor.VisitMethodCall(MethodCallExpression
node)
at Atlassian.Jira.Linq.JqlExpressionVisitor.VisitMethodCall(MethodCallExpression
node) in
c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line
252
at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor
visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at System.Linq.Expressions.ExpressionVisitor.VisitArguments(IArgumentProvider
nodes)
at System.Linq.Expressions.ExpressionVisitor.VisitMethodCall(MethodCallExpression
node)
at Atlassian.Jira.Linq.JqlExpressionVisitor.VisitMethodCall(MethodCallExpression
node) in
c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line
252
at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor
visitor)
at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
at Atlassian.Jira.Linq.JqlExpressionVisitor.Process(Expression expression) in
c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line
42
at Atlassian.Jira.Linq.JiraQueryProvider.Execute(Expression expression, Boolean isEnumerable) in
c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JiraQueryProvider.cs:line
44
at Atlassian.Jira.Linq.JiraQueryProvider.Execute(Expression expression) in
c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JiraQueryProvider.cs:line
39
at Atlassian.Jira.Linq.JiraQueryable`1.GetEnumerator() in c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JiraQueryable.cs:line
29
at System.Linq.Buffer1..ctor(IEnumerable\1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at JiraUpdater.JiraStuff.GetIssueByDetail(String summary) in C:\Users\v709092\Documents\Visual Studio
2013\Projects\JiraUpdater\JiraUpdater\JiraStuff.vb:line 33
at JiraUpdater.Form1.ButtonMassUpdate_Click(Object sender, EventArgs e) in C:\Users\v709092\Documents\Visual Studio
2013\Projects\JiraUpdater\JiraUpdater\Form1.vb:line 98
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr
dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32
reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32
reason, ApplicationContext context)
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[]
commandLine)
at JiraUpdater.My.MyApplication.Main(String[] Args) in :line 81
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext
executionContext, ContextCallback callback, Object state, Boolean
preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean
preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart() InnerException:
我的代码是在项目 WIKI 页面上找到的示例代码的直接转换。
Dim myJira As Jira = Jira.CreateRestClient("JiraServer", "username", "password")
Dim myIssueQuery = From i In myJira.Issues
Where i.Project = "JiraProjectName"
Select i
Console.WriteLine( myIssueQuery.Count())
经过一些研究后，我确信这是 LINQ 提供程序处理查询的方式的问题。这个issue早就反馈给开发者，标记为"Won't Fix"，因为开发者不熟悉VB。
我非常感谢任何帮助，无论是向开发人员提供相关详细信息以解决他们方面的问题，还是更实际地帮助指出我做错了什么。
Jira 的 Api 可能会变得有点复杂，很容易最终使用无法满足您要求的旧版本。我使用 nuget 包 "Atlassian.SDK".
获得了最好的结果
有了这个，做你想做的事就相对简单了。这是 C# 代码，但我想 vb.net 不会有太大不同。
this.JiraConnection = Jira.CreateRestClient(jiraUrl, jiraUser, jiraPassword);
string jql = "project = TC";
IEnumerable<Issue> issues = this.JiraConnection.GetIssuesFromJql(jql, 100);
这允许您使用 Jira 查询语言来获取您想要的问题，在我的测试中证明这比使用 Linq 查询更快更可靠。
HTH
让我们首先声明我不是一个非常有经验的开发人员，所以我很可能在这里完全遗漏了一些东西。
我正在 VB .Net 解决方案中实施 Atlassian.NET SDK。大多数情况下一切正常，但当我尝试直接使用 LINQ 提供程序时出现以下错误：
An unhandled exception of type 'System.InvalidCastException' occurred in Atlassian.Jira.dll
Additional information: Unable to cast object of type 'System.Linq.Expressions.PropertyExpression' to type 'System.Linq.Expressions.ConstantExpression'.
完整异常：
System.InvalidCastException was unhandled HResult=-2147467262
Message=Unable to cast object of type 'System.Linq.Expressions.PropertyExpression' to type 'System.Linq.Expressions.ConstantExpression'. Source=Atlassian.Jira StackTrace: at Atlassian.Jira.Linq.JqlExpressionVisitor.GetFieldNameFromBinaryExpression(BinaryExpression expression) in c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line 65 at Atlassian.Jira.Linq.JqlExpressionVisitor.ProcessIndexedMemberEqualityOperator(BinaryExpression expression, Boolean equal) in c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line 142 at Atlassian.Jira.Linq.JqlExpressionVisitor.ProcessEqualityOperator(BinaryExpression expression, Boolean equal) in c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line 136 at Atlassian.Jira.Linq.JqlExpressionVisitor.VisitBinary(BinaryExpression node) in c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line 325 at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor) at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node) at System.Linq.Expressions.ExpressionVisitor.VisitLambda[T](Expression`1 node) at System.Linq.Expressions.Expression`1.Accept(ExpressionVisitor visitor) at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node) at System.Linq.Expressions.ExpressionVisitor.VisitUnary(UnaryExpression node) at System.Linq.Expressions.UnaryExpression.Accept(ExpressionVisitor visitor) at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node) at System.Linq.Expressions.ExpressionVisitor.VisitArguments(IArgumentProvider nodes) at System.Linq.Expressions.ExpressionVisitor.VisitMethodCall(MethodCallExpression node) at Atlassian.Jira.Linq.JqlExpressionVisitor.VisitMethodCall(MethodCallExpression node) in c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line 252 at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor) at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node) at System.Linq.Expressions.ExpressionVisitor.VisitArguments(IArgumentProvider nodes) at System.Linq.Expressions.ExpressionVisitor.VisitMethodCall(MethodCallExpression node) at Atlassian.Jira.Linq.JqlExpressionVisitor.VisitMethodCall(MethodCallExpression node) in c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line 252 at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor) at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node) at Atlassian.Jira.Linq.JqlExpressionVisitor.Process(Expression expression) in c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JqlExpressionVisitor.cs:line 42 at Atlassian.Jira.Linq.JiraQueryProvider.Execute(Expression expression, Boolean isEnumerable) in c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JiraQueryProvider.cs:line 44 at Atlassian.Jira.Linq.JiraQueryProvider.Execute(Expression expression) in c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JiraQueryProvider.cs:line 39 at Atlassian.Jira.Linq.JiraQueryable`1.GetEnumerator() in c:\projects\atlassian-net-sdk\Atlassian.Jira\Linq\JiraQueryable.cs:line 29 at System.Linq.Buffer1..ctor(IEnumerable\1 source) at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source) at JiraUpdater.JiraStuff.GetIssueByDetail(String summary) in C:\Users\v709092\Documents\Visual Studio 2013\Projects\JiraUpdater\JiraUpdater\JiraStuff.vb:line 33 at JiraUpdater.Form1.ButtonMassUpdate_Click(Object sender, EventArgs e) in C:\Users\v709092\Documents\Visual Studio 2013\Projects\JiraUpdater\JiraUpdater\Form1.vb:line 98 at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData) at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun() at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel() at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine) at JiraUpdater.My.MyApplication.Main(String[] Args) in :line 81 at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart() InnerException:
我的代码是在项目 WIKI 页面上找到的示例代码的直接转换。
Dim myJira As Jira = Jira.CreateRestClient("JiraServer", "username", "password")
Dim myIssueQuery = From i In myJira.Issues
Where i.Project = "JiraProjectName"
Select i
Console.WriteLine( myIssueQuery.Count())
经过一些研究后，我确信这是 LINQ 提供程序处理查询的方式的问题。这个issue早就反馈给开发者，标记为"Won't Fix"，因为开发者不熟悉VB。
我非常感谢任何帮助，无论是向开发人员提供相关详细信息以解决他们方面的问题，还是更实际地帮助指出我做错了什么。
Jira 的 Api 可能会变得有点复杂，很容易最终使用无法满足您要求的旧版本。我使用 nuget 包 "Atlassian.SDK".
获得了最好的结果有了这个，做你想做的事就相对简单了。这是 C# 代码，但我想 vb.net 不会有太大不同。
this.JiraConnection = Jira.CreateRestClient(jiraUrl, jiraUser, jiraPassword);
string jql = "project = TC";
IEnumerable<Issue> issues = this.JiraConnection.GetIssuesFromJql(jql, 100);
这允许您使用 Jira 查询语言来获取您想要的问题，在我的测试中证明这比使用 Linq 查询更快更可靠。
HTH