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nhibernate/castle activerecord:如何获取导致数据库异常的对象?

castle-activerecord nhibernate

AngelBlaZe · 技术社区 · 15 年前

我能否以某种方式获取导致GenericDoException(约束异常)的对象?

或者我怎样才能只冲洗一个物体,这样我就能分辨出哪个是问题所在。

我有一个以窗体显示的对象列表,可以对其进行编辑和添加。在flush时,它会给我一个数据库异常,但我无法分辨哪个对象给出了异常。

我无法将约束移动到nhibernate。

2 回复 | 直到 15 年前

Shane Courtrille 15 年前

你试过使用NHibernate分析仪吗?它应该为您提供问题所在的其他详细信息。

AngelBlaZe 15 年前

通过一些谷歌搜索,我找到了一个有用的帖子,然后通过阅读NHibernate来源,我找到了以下内容:

http://fabiomaulo.blogspot.com/2009/06/improving-ado-exception-management-in.html

'http://fabiomaulo.blogspot.com/2009/06/improving-ado-exception-management-in.html
'properties.Add("sql_exception_converter", "SmartCore.SmartDatabaseExceptionConverter, SmartCore")
Class SmartDatabaseExceptionConverter
    Implements ISQLExceptionConverter


    Public Function Convert(ByVal sqlException As System.Exception, ByVal message As String, ByVal sql As NHibernate.SqlCommand.SqlString) As NHibernate.ADOException Implements NHibernate.Exceptions.ISQLExceptionConverter.Convert

        Dim sqle As DbException
        sqle = ADOExceptionHelper.ExtractDbException(sqlException)
        '"could not update: [SmartCore.GL.Glaccount#1225]"
        Dim obname As String
        Dim key As String
        obname = ExtractUsingTemplate("could not update: [", "#", message)
        key = ExtractUsingTemplate("#", "]", message)

        Dim prikey As Integer
        prikey = Integer.Parse(key)

        sqle.Data.Add("obname", obname)
        sqle.Data.Add("prikey", key)

        If sqle.ErrorCode = 335544558 Then
            '"Operation violates CHECK constraint C_GLACCOUNT on view or table GLACCOUNT At trigger 'CHECK_56'"
            Dim checkname As String
            checkname = ExtractUsingTemplate("Operation violates CHECK constraint ", "on view or table ", sqle.Message)
            Return New SmartDatabaseConstraintException(message, sqle, obname, prikey, checkname)
            'Return New ConstraintViolationException(message, sqle, sql, checkname)
        End If

        Return SQLStateConverter.HandledNonSpecificException(sqlException, message, sql)
    End Function



    Protected Function ExtractUsingTemplate(ByVal templateStart As String, ByVal templateEnd As String, ByVal message As String) As String
        Dim templateStartPosition As Integer = message.IndexOf(templateStart)
        If templateStartPosition < 0 Then
            Return Nothing
        End If

        Dim start As Integer = templateStartPosition + templateStart.Length
        Dim [end] As Integer = message.IndexOf(templateEnd, start)
        If [end] < 0 Then
            [end] = message.Length
        End If

        Return message.Substring(start, [end] - start).Trim()

    End Function
End Class

'USAGE
        Try
            _scope.Flush()
        Catch ex As SmartDatabaseConstraintException
            If ex.ConstraintName = "C_GLACCOUNT" Then
                Dim gla As GL.Glaccount
                gla = GL.Glaccount.Find(ex.EntityId) 'should be fast from entity cache
                msgboxError(gla.description & " is duplicate please rename")
            Else
                msgboxError(ex.Message)
            End If
        End Try

我必须调整它,使之与我的稍微过时的nhibernate版本(2.1从3月起)一起工作,我将不得不稍微调整上面的版本,以便与更新的版本一起工作,其中有一个adoExceptionContextInfo,从中可以获得对象名称和ID。nhibernate是好的!