Implementarr Asp.net core Identity 2.1 in a databasefirst project with two contexts

Question

I am encountering a problem. Below I have performed the following steps:

1) I created an Asp.net core web Aplication MVC project without authentication (Asp.net core 2.2).

2) Because I already have a database, I used the Databasefirst schema, so a context was created automatically.

3) I then decided to add Asp.Net Core Identity to my project.

The problem is that I now have two Contexts, one for Identity and the other for my database. Only the database is unique, so I understand that there should be no two contexts.

How do I configure the two contexts in Statup.Cs with the same connection string?

Hugs

Answer 1

You can inherit Identitydbcontext from the main application context, example:

 public class ApplicationDbContext: IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
     : base(options)
    {
    }

    public DbSet<MessageUser> Message { get; set; }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);

        builder.ApplyConfiguration(new ApplicationUserEntityTypeConfiguration());
        builder.ApplyConfiguration(new MessageUserEntityTypeConfiguration());
        // Customize the ASP.NET Identity model and override the defaults if needed.
        // For example, you can rename the ASP.NET Identity table names and more.
        // Add your customizations after calling base.OnModelCreating(builder);
    }
}

In this case I have customized Identityuser using the Applicationuser class, but this is optional.

  public class ApplicationUser: IdentityUser
{
    public string CPF { get; set; }

}

Reference: https://docs.microsoft.com/pt-br/aspnet/core/security/authentication/customize-identity-model?view=aspnetcore-2.2