Attributes · 1 min read

Identity

Learn on how to use the RepoDB Identity attribute.

This attribute marks a class property as an identity property.

Usage

Given a table [dbo].[Person] where Id is an identity field:

CREATE TABLE [dbo].[Person]
(
    [Id] [bigint] IDENTITY(1,1) NOT NULL,
    [Name] [nvarchar](128) NOT NULL
)
ON [PRIMARY];
GO

And a Person model class:

public class Person
{
    [Identity] // Identity decoration
    public long Id { get; set; }
    public string Name { get; set; }
}

Explicitly setting this attribute overrides the library’s auto-identification logic. If applied to a property that is not a database identity, the library will use that property instead, which may cause some operations to fail.

Fluent Mapping

To configure via FluentMapper:

FluentMapper
    .Entity<Person>()
    .Identity(e => e.Id);

Retrieval

To retrieve the identity property, use the IdentityCache object.

var identity = IdentityCache.Get<Person>();

Or by .NET CLR type:

var identity = IdentityCache.Get(typeof(Person));