How Can I Customize ASP.NET Identity Table Names?

Tailoring ASP.NET Identity Table Names

ASP.NET Identity, by default, generates tables prefixed with "AspNet." This might clash with your project's naming conventions. This guide shows how to customize these table names.

Modifying OnModelCreating

The key to changing Identity's table names lies in overriding the OnModelCreating method within your DbContext class. This method allows you to configure your data model and specify custom table names.

The example below demonstrates renaming the "AspNetUsers" table to "MyUsers":

<code class="language-csharp">protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);
    modelBuilder.Entity<IdentityUser>().ToTable("MyUsers");
}</code>

Customizing All Identity Tables

To rename all Identity tables, specify your preferred names within OnModelCreating. The following example uses the "My" prefix for all tables:

<code class="language-csharp">protected override void OnModelCreating(System.Data.Entity.DbModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);

    modelBuilder.Entity<IdentityUser>().ToTable("MyUsers").Property(p => p.Id).HasColumnName("UserId");
    modelBuilder.Entity<IdentityRole>().ToTable("MyRoles");
    modelBuilder.Entity<IdentityUserRole>().ToTable("MyUserRoles");
    modelBuilder.Entity<IdentityUserLogin>().ToTable("MyUserLogins");
    modelBuilder.Entity<IdentityUserClaim>().ToTable("MyUserClaims");
}</code>

Important Consideration: After renaming tables, update any code or database queries that reference the original "AspNet" prefixed tables to reflect the new names. Failure to do so will result in errors.

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