Question

I have the following code:

http://pastebin.com/442Ew49i

This creates a line in my 'Persons' table where Name is NULL but id has a value.

Any idea's?

Accepted Answer

0

You must use

either auto-properties,
or our own GetFieldValue<t>(...) and SetFieldValue<t>(...) (protected methods inherited from Persistent type) inside regular property getter and setter to read and store the value instead of backing field.

Otherwise DataObjects.Net won't have a chance to intercept property access operation.

An example of manually defined persistent property in C#:

[Field]
public string Title {
  get { return GetProperty<string>("Title"); }
  set { SetProperty("Title", value); }
}

So you shouldn't declare backing fields as well.

P.S. When auto-property is used, its getter and setter are overwritten by PostSharp by absolutely the same way - this is easy to check using e.g. RedGate .NET Reflector.

answered Oct 07 '10 at 10:49

Alex Yakunin
2971●4●4●12

edited Oct 07 '10 at 10:53

Auto-properties aren't an option. I'm using .NET Framework 3.5. I'll implement the GetFieldValue and SetFieldValue functionalities. Working like a charm.

(Oct 07 '10 at 10:55) Michiel Alders

Oh, quite quick response ;) Btw, VB10 \ VS2010 can target .NET 3.5 (may be this will be helpful).

(Oct 07 '10 at 10:59) Alex Yakunin

I'll keep that in mind, got it installed anyway. Thanks

(Oct 07 '10 at 12:12) Michiel Alders

Answer 2

I tried the same thing in VB10/VS2010 but the same problem occured.

My Class:

<HierarchyRoot()> _
<TableMapping("Projects")> _
Public Class Project
    Inherits Entity

    Public Sub New()
        MyBase.New()
    End Sub

    Private _Id As Integer
    <Key(), Field()> _
    Public Property ID As Integer
        Get
            Return GetFieldValue(Of Integer)("ID")
        End Get
        Private Set(ByVal value As Integer)
            SetFieldValue(Of Integer)("ID", value)
        End Set
    End Property

    <Field()> _
    Public Property Name As String

    <Field()> _
    Public Property Description As String

End Class

Field is entered correctly, also on Query.All(Of Project), but Name and Description remain 'Nothing'.

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