Why swagger return "Failed to load api definition"?

Question

This is my code. I'm trying to overload GET with 2 function :

With one parameter
With two parameter

I'm getting Swagger error "Failed to load API definition". Why ?

[Route("api/[controller]")]
[ApiController] 
public class HospitalizedController : ControllerBase
{
    [HttpGet("")]
    public string Get(string MedicID)
    {
        string jsonData;

        string connString = gsUtils.GetDbConnectionString();
        // dosomething
    
    }

    [HttpGet("")]
    public string Get(string MedicID, string PatientID)
    {
        string jsonData;

        string connString = gsUtils.GetDbConnectionString();
        
        //do something
    }

}

Because the endpoint of the two methods is the same (/api/hospitalized). Maybe you can use: /api/hospitalized/{medicId} and /api/hospitalized/{medicId}/patients/{patientId} ? — Randy
– Randy, Commented Nov 6, 2022 at 10:34
I've written the comment as an answer with an example for the Route attribute — Randy
– Randy, Commented Nov 6, 2022 at 10:38

Randy · Accepted Answer · 2022-11-06 10:37:49Z

2

The error "Failed to load API definition" occurs because the two methods are on the same Route.

You can specify a more specific route to distinguish them, like this:

[Route("api/[controller]")]
[ApiController] 
public class HospitalizedController : ControllerBase
{
    [HttpGet]
    [Route("{medicId}")]
    public string Get(string medicID)
    {
    
    }

    [HttpGet]
    [Route("{medicId}/patients/{patientId}")]
    public string Get(string medicID, string patientID)
    {

    }

}

answered Nov 6, 2022 at 10:37

Randy

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