ASP.Net Core how to get the user role in EF Core and Identity
Solution 1
var user = await _userManager.FindByIdAsync(UserId);
var roles = await _userManager.GetRolesAsync(user);
return OK(new { User = user, Roles = roles });
This produces role names, either way the only way to get this back to your api call is to return a ViewModel or other option as Chris points out it isn't possible to directly call.. Its so round about to achieve something so small.
At any rate this is a second option to get the "Role" names without having to touch your db context.
If you want the Id's
pull that from RoleManager<IdentityRole>
or tap your dbcontext.
Callings it Roles
in what ever you do might cause interference since roles[]
will already exist in the return of the User
.
Solution 2
Unfortunately, there's not navigation properties on UserRole
, so it's a manual affair. You'd need to do something like:
var userRoleIds = user.Roles.Select(r => r.RoleId);
var roles = db.Roles.Where(r => userRoleIds.Contains(r.Id));
Then, you can map those on to the user via a view model. For example:
public class UserViewModel
{
...
public List<string> Roles { get; set; }
}
Then:
var model = new UserViewModel
{
...
Roles = roles.Select(r => r.Name).ToList()
}
Angel Silva
Updated on August 02, 2020Comments
-
Angel Silva over 3 years
Hi I'm building a API using Identity with a custom user class,and EF Core. I want to get the name of the role that belongs to an user. The diagram of the tables is the following(ignore userclaims and userlogins):
As you can see the Roles and Users is N to N so internally Identity made a junction table named UserRoles, my contoller looks like this:
Route ("api/[controller]")] public class UserController : Controller { private readonly DBContext _db; private readonly UserManager<Usuario> _userManager; public UserController (DBContext db, UserManager<Usuario> userManager) { this._db = db; } [HttpGet ("GetUserById/{id}", Name = "GetUserById")] public async Task<IActionResult> GetUserById (string id) { try { var user = await this._db.Users.Where (x => x.Id == id).Include (x => x.Roles).FirstOrDefaultAsync (); if (user == null) { return NotFound (); } return Ok (user); } catch (Exception e) { Console.WriteLine (e.Message); return BadRequest (); } }
When I called it in Postman I get the following response:
As you can see in the roles part all I get is:
"roles": [ { "userId": "d88b0c2d-25c5-4da9-ad05-45f69dec67ff", "roleId": "a83a60ca-f011-43ce-be3d-8b71403aa86e" } ]
That data belongs to the junction table not the Role table itself, I dont want that.
What I really want is the "real" Role table data, Any idea how can I achieve that?
In sql it would be something like :
select * from AspNetUsers as a,AspNetUserRoles as b,AspNetRoles as c where a.Id = b.UserId and b.RoleId= c.Id