ASP.NET Core 2.1 - IdentityUser Issue - Cannot create a DbSet for 'IdentityUser' this type is not included in the model for the context

ASP.NET Core 2.1 - IdentityUser Issue - Cannot create a DbSet for 'IdentityUser' this type is not included in the model for the context

The error message "Cannot create a DbSet for 'IdentityUser' this type is not included in the model for the context" occurs when your application's DbContext does not include the IdentityUser type.

To fix this issue, you need to add the IdentityUser type to your DbContext by inheriting from the IdentityDbContext class instead of the default DbContext class. The IdentityDbContext class includes the IdentityUser type by default.

Here is an example of how to inherit from the IdentityDbContext class:

using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;

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

In this example, the ApplicationDbContext class inherits from the IdentityDbContext class with the ApplicationUser type parameter. The ApplicationUser class should be the custom user type that you created to extend the IdentityUser class. If you did not create a custom user type, you can use the IdentityUser type directly.

After you've updated your DbContext, you should also update the services.AddDbContext method in your Startup class to use your custom DbContext, like this:

services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

In this example, the ApplicationDbContext class is used as the type parameter for the AddDbContext method.

Once you've made these changes, you should be able to create a DbSet for the IdentityUser type in your DbContext without encountering the error message.

Examples

  1. "ASP.NET Core 2.1 IdentityUser DbSet error"

    • Code Implementation:
      public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    // Your context implementation
}
    • Description: Defines a custom ApplicationDbContext that inherits from IdentityDbContext<ApplicationUser> to resolve the IdentityUser DbSet issue.

  2. "ASP.NET Core 2.1 IdentityUser not recognized in DbContext"

    • Code Implementation:
      public class ApplicationUser : IdentityUser
{
    // Your ApplicationUser class implementation
}
    • Description: Defines a custom ApplicationUser class that inherits from IdentityUser to address the IdentityUser not recognized issue.

  3. "ASP.NET Core 2.1 IdentityUser not part of model for context"

    • Code Implementation:
      services.AddIdentity<ApplicationUser, IdentityRole>()
    .AddEntityFrameworkStores<ApplicationDbContext>()
    .AddDefaultTokenProviders();
    • Description: Configures Identity services in Startup.cs to use ApplicationUser and ApplicationDbContext for DbSet inclusion.

  4. "AspNetCore IdentityUser DbSet missing"

    • Code Implementation:
      public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}
    • Description: Ensures that ApplicationDbContext includes the necessary base constructor with options to resolve IdentityUser DbSet missing issues.

  5. "Cannot create DbSet for IdentityUser IdentityDbContext"

    • Code Implementation:
      public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}
    • Description: Addresses the issue by creating a custom ApplicationDbContext that inherits from IdentityDbContext<ApplicationUser>.

  6. "IdentityUser not part of DbContext in ASP.NET Core"

    • Code Implementation:
      public class ApplicationUser : IdentityUser
{
    // Your ApplicationUser class implementation
}

      public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}
    • Description: Defines a custom ApplicationUser and ApplicationDbContext to ensure IdentityUser is part of the DbContext.

  7. "ASP.NET Core IdentityUser not recognized in DbContext"

    • Code Implementation:
      public class ApplicationUser : IdentityUser
{
    // Your ApplicationUser class implementation
}

      public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}
    • Description: Resolves the IdentityUser recognition issue by defining a custom ApplicationUser and ApplicationDbContext.

  8. "AspNetCore IdentityUser DbSet not found"

    • Code Implementation:
      public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}
    • Description: Addresses the missing IdentityUser DbSet by ensuring the custom ApplicationDbContext inherits from IdentityDbContext<ApplicationUser>.

  9. "IdentityUser not part of DbContext in IdentityDbContext"

    • Code Implementation:
      public class ApplicationUser : IdentityUser
{
    // Your ApplicationUser class implementation
}

      public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}
    • Description: Defines a custom ApplicationUser and ApplicationDbContext to ensure IdentityUser is part of the IdentityDbContext.

  10. "ASP.NET Core IdentityUser DbSet error after upgrade"

    • Code Implementation:
      public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}
    • Description: Resolves IdentityUser DbSet issues after an upgrade by ensuring the custom ApplicationDbContext inherits from IdentityDbContext<ApplicationUser>.

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