CODEWITHSUNDEEP
c#asp.net-coreasp.net-identity
Jordan L
Jordan L

Reputation: 79

FindByIdAsync returns null user object, dotnet core 2.0

I have problem loading user object using FindByIdAsync (FindByIdEmailAsync, FindByNameAsync also doesn't work in this specific case). The FindByIdAsync returns null.

IdentityController.cs

public class IdentityController : Controller
{
    private readonly UserManager<ApplicationUser> userManager;
    private readonly IIdentityService identity;
    private readonly RoleManager<IdentityRole> roleManager;

    public IdentityController(UserManager<ApplicationUser> userManager,
                              IIdentityService identity,
                              RoleManager<IdentityRole> roleManager)
    {
        this.userManager = userManager;
        this.identity = identity;
        this.roleManager = roleManager;
    }


    public async Task<IActionResult> Roles(string id)
    {
        var user = await this.userManager.FindByIdAsync(id);

        var u = this.userManager.GetUserId(User);

        if (user == null)
        {
            return NotFound();
        }      
     ....

The user is in database: user in database and User id is passed to the controller action: Debuger

Have tried some sort of playground with new standard VS2017 ASP.NET Core MVC Template and added only FindByIdAsync on About and it WORKS.

Thanks

Upvotes: 1

Views: 3357

Answers (1)

Dave Cousineau
Dave Cousineau

Reputation: 13148

According to your images, your id string is wrapped in { and } symbols, yet that is not the string that is in the database. I also notice that the value you get back from GetUserId is not wrapped in braces. Either parse out the braces from id, or use the value of u, or pass the right value to Roles.

Ex:

public async Task<IActionResult> Roles(string id)
{
    if (id.Length > 0 && id[0] == '{')
       id = id.Substring(1, id.Length - 2);

    var user = await this.userManager.FindByIdAsync(id);

    var u = this.userManager.GetUserId(User);

    if (user == null)
    {
        return NotFound();
    }      
 ....

Upvotes: 1

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