Mixing Default and Explicit Mapping

This article is relevant to entity models that utilize the deprecated Visual Studio integration of Telerik Data Access. The current documentation of the Data Access framework is available here.

Telerik Data Access Fluent Mapping API gives you an option to mix default mapping with explicit mapping. That means that you can map part of your model by using explicit mapping and use default mapping for the rest of the model. The following example demonstrates how to configure the Person class by using default and explicit mapping. The key point here is the usage of the UseDefaultMap method.

public class FluentModelMetadataSource : FluentMetadataSource
{
   protected override IList<MappingConfiguration> PrepareMapping()
   {
       List<MappingConfiguration> configurations = new List<MappingConfiguration>();
       MappingConfiguration<Person> personConfiguraiton = new MappingConfiguration<Person>();

       personConfiguraiton.MapType( p => new
       {
           Id = p.Id,
           LastName = p.LastName
       } ).UseDefaultMap().ToTable( "People" );

       personConfiguraiton.HasProperty( p => p.Id ).IsIdentity( KeyGenerator.Autoinc );

       configurations.Add( personConfiguraiton );
       return configurations;
   }
}

Public Class FluentModelMetadataSource
    Inherits FluentMetadataSource
    Protected Overrides Function PrepareMapping() As _
        System.Collections.Generic.IList(Of Telerik.OpenAccess.Metadata.Fluent.MappingConfiguration)
        Dim configurations As List(Of MappingConfiguration) = New List(Of MappingConfiguration)()
        Dim personConfiguraiton As New MappingConfiguration(Of Person)()

        personConfiguraiton.MapType(Function(p) _
            New With {Key .Id = p.Id, Key .LastName = p.LastName}). _
            UseDefaultMap().ToTable("People")

        personConfiguraiton.HasProperty(Function(p) p.Id).IsIdentity()
        personConfiguraiton.FieldNamingRules.AddPrefix = "_"

        configurations.Add(personConfiguraiton)
        Return configurations
    End Function
End Class

When you update your database to the latest model state, the result table will have the following structure:

Fluent Mapping API allows you to map a class to more than one table in the database. Read more

Person Class

public class Person
{
   public int Id {get;set;}
   public string FirstName {get;set;}
   public string LastName {get;set;}
   public string Address {get;set;}
}

Public Class Person
    Private _id As Integer
    Public Property Id() As Integer
        Get
            Return _id
        End Get
        Set(ByVal value As Integer)
            _id = value
        End Set
    End Property

    Private _firstName As String
    Public Property FirstName() As String
        Get
            Return _firstName
        End Get
        Set(ByVal value As String)
            _firstName = value
        End Set
    End Property

    Private _lastName As String
    Public Property LastName() As String
        Get
            Return _lastName
        End Get
        Set(ByVal value As String)
            _lastName = value
        End Set
    End Property

    Private _address As String
    Public Property Address() As String
        Get
            Return _address
        End Get
        Set(ByVal value As String)
            _address = value
        End Set
    End Property
End Class