405 status when hitting actions for GET in controller-CodePudding

The idea is that with these ItemController methods I should be able to:

Get the items by barcode when hitting "item/query?barcode={barcode}"
Get the items by discount when hitting "item/query?discount={discount}"
Get the items by name when hitting "item/query?name={name}"
Get the items by category when hitting "item/query?category={category}"

And this is my code for actions under the GET verb:

[HttpGet("query/{barcode:int}")]
public async Task<IActionResult> GetByBarcode(int barcode)
{
    var item = ...
    
    return Ok(item);
}

[HttpGet("query/{discount:int}")]
public async Task<IActionResult> GetByDiscount(int discount)
{
    var items =  ...
    
    return Ok(items);
}


[HttpGet("query/{name}")]
public async Task<IActionResult> GetByName(string name)
{
    var items = ...
    
    return Ok(items);
}

[HttpGet("query/{category}")]
public async Task<IActionResult> GetByCategory(string category)
{
    var items = ...
    
    return Ok(items);
}

The problem is that I keep getting 405 Method Not Allowed when I try to access to any of those actions. I don't know if it's a matter of ambiguity between the methods, can you help me out?

Edit:

Header of ItemController.cs:

using InventoryWebApi.DataAccess;
using InventoryWebApi.DTO;
using InventoryWebApi.Models;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Linq;
using System.Threading.Tasks;

namespace InventoryWebApi.Controllers
{
    [ApiController]
    [Route("[controller]")]
    public class ItemController : ControllerBase
    {
        private readonly IRepository repository;

        public ItemController(IRepository repository)
...

CodePudding user response：

you are using routing a wrong way.

Your code will not be even run, your actions shoud be

[HttpGet("query/getbybarcode/{barcode:int})]
public async Task<IActionResult> GetByBarcode(int barcode)

[HttpGet("query/getbydiscount/{discount:int}")]
public async Task<IActionResult> GetByDiscount(int discount)

For this routes you have to use this urls

.../item/query/getbybarcode/{barcode}
..../item/query/getbydiscount/{discount}

if you still want to create url your way you will have to change attribute routing

[HttpGet("query/getbybarcode)]
public async Task<IActionResult> GetByBarcode(int barcode)

[HttpGet("query/getbydiscount")]
public async Task<IActionResult> GetByDiscount(int discount)

and your url should be

.../item/query/getbydiscount?discount={discount}"
..../item/query/getbybarcode?barcode={barcode}"

Update

If you still need to use all your urls for your student project , then the only way is to use one action for all your urls

[HttpGet("query")]
public async Task<IActionResult> Get(int? barcode, int? discount, 
string name, string category )
{
 
   if (barcode != null) ...
else if (discount!=null) ...


    var item = ...
    
    return Ok(item);
}