我有 2 种方法来处理 HTTP GET 请求,第一个方法用于int
键入输入,另一个用于string
类型输入。
//GET : api/Fighters/5
[HttpGet("{id}")]
public async Task<ActionResult<Fighter>> GetFighter(int id)
{
var fighter = await _context.Fighters.FindAsync(id);
if (fighter == null)
{
return NotFound();
}
return fighter;
}
// GET: api/Fighters/Alex
[Route("api/Fighters/{name}")]
[HttpGet("{name}")]
public async Task<ActionResult<IEnumerable<Fighter>>> GetFighter (string name)
{
return await _context.Fighters.Where(f => f.Name == name).ToListAsync();
}
当我发送 HTTP GET 时出现此异常(在 Postman 中):
Microsoft.AspNetCore.Routing.Matching.AmbiguousMatchException: The request matched multiple endpoints. Matches:
FighterGameService.Controllers.FightersController.GetFighter (FighterGameService)
FighterGameService.Controllers.FightersController.GetFighter (FighterGameService)
FighterGameService.Controllers.FightersController.GetFighter (FighterGameService)
FighterGameService.Controllers.FightersController.GetFighter (FighterGameService)
at Microsoft.AspNetCore.Routing.Matching.DefaultEndpointSelector.ReportAmbiguity(CandidateState[] candidateState)
at Microsoft.AspNetCore.Routing.Matching.DefaultEndpointSelector.ProcessFinalCandidates(HttpContext httpContext, CandidateState[] candidateState)
at Microsoft.AspNetCore.Routing.Matching.DefaultEndpointSelector.Select(HttpContext httpContext, CandidateState[] candidateState)
at Microsoft.AspNetCore.Routing.Matching.DfaMatcher.MatchAsync(HttpContext httpContext)
at Microsoft.AspNetCore.Routing.Matching.DataSourceDependentMatcher.MatchAsync(HttpContext httpContext)
at Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware.Invoke(HttpContext httpContext)
at Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.HttpsPolicy.HttpsRedirectionMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
GET api/fighters/1
显然会导致错误,因为“1
“ 可以是int
or string
所以我通过结合两种方法解决了我的问题:
// GET: api/Fighters/5
// GET: api/Fighters/Alex
[HttpGet("{idOrName}")]
public async Task<ActionResult<IEnumerable<Fighter>>> GetFighter(string idOrName)
{
if (Int32.TryParse(idOrName, out int id))
{
return await _context.Fighters.Where(f => f.Id == id).ToListAsync();
}
else
{
return await _context.Fighters.Where(f => f.Name == idOrName).ToListAsync();
}
}
这可行,但是感觉根本不对。处理这个问题的正确方法是什么?