Modify Identity User properties in Identity Core

Question

If there is a preexisting property in identy user like email, how do i modify it? Thanks!!!

Answer 1

Hi @Ronald Rex ,

By default, the Identity User contains the following properties:

Do you mean you want to modify the property name, for example, modify the Email to UserEmail? If that is the case, you could use the Fluent API and HasColumnName() method to change the property name, code like this:

public class ApplicationDbContext : IdentityDbContext  
{  
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)  
        : base(options)  
    {   
    }  
    protected override void OnModelCreating(ModelBuilder modelBuilder)  
    {  
        base.OnModelCreating(modelBuilder);  
  
        modelBuilder.Entity<IdentityUser>(  
            iu => iu.Property(c => c.Email).HasColumnName("UserEmail")  
            );  
    }  
}   

Then, use the following migration commands to enable migration:

add-migration changeIdentityUseremail  

update-database  

The generate migration file as below:

public partial class changeIdentityUseremail : Migration  
{  
    protected override void Up(MigrationBuilder migrationBuilder)  
    {  
        migrationBuilder.RenameColumn(  
            name: "Email",  
            table: "AspNetUsers",  
            newName: "UserEmail");  
    }  

    protected override void Down(MigrationBuilder migrationBuilder)  
    {  
        migrationBuilder.RenameColumn(  
            name: "UserEmail",  
            table: "AspNetUsers",  
            newName: "Email");  
    }  
}  

And the result like this: we can see the Email column has been changed to UserEmail

Besides, if you mean you want to add custom data to the Identity User table, you could refer the following articles:

Add, download, and delete custom user data to Identity in an ASP.NET Core project

Identity model customization in ASP.NET Core

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Best regards,
Dillion