Code Quiz

Controller POST with EF Core

Spot the bug in an ASP.NET Core Web API controller action that saves an entity with EF Core.

Codecsharp

[ApiController]
[Route("api/[controller]")]
public class ProductsController : ControllerBase
{
    private readonly AppDbContext _db;
    public ProductsController(AppDbContext db) => _db = db;

    [HttpPost]
    public async Task<ActionResult<Product>> Create([FromBody] Product product)
    {
        _db.Products.Add(product);
        _db.SaveChangesAsync();
        return CreatedAtAction(nameof(GetById), new { id = product.Id }, product);
    }

    [HttpGet("{id}")]
    public async Task<ActionResult<Product>> GetById(int id)
    {
        var product = await _db.Products.FindAsync(id);
        return product is null ? NotFound() : Ok(product);
    }
}

What is the bug in this controller code?

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