I am new to attribute routing, and I am not sure if this is even possible.
I have an attribute route, which works fine like this:
[HttpGet]
[Route("GetIssuesByFlag/{flag:int=3}")]
public IEnumerable<IssueDto> GetIssuesByFlag(int flag)
Now I want to add some extra optional parameters to narrow down my search, so I want to add 2 extra optional parameters.
What I have tried:
[HttpGet]
[Route("GetIssuesByFlag/{flag:int=3?}/{categoryId:int?}/{tagIds?}")]
public IEnumerable<IssueDto> GetIssuesByFlag(int flag , int? categoryId = null, int?[] tagIds = null)
This works fine if my call is /api/controller/1/2
, but fails with 404 when it comes to /api/controller/1
.
How can I achieve this?
Edit 1: Nkosi's answer below worked, however an extra modification was needed.
[HttpGet]
[Route("GetIssuesByFlag/{flag:int=3}/{tagIds?}/{categoryId:int?}")]
public IEnumerable<IssueDto> GetIssuesByFlag(int flag , List<int> tagIds, int? categoryId = null )
The list or array must be second as it is automatically null if no value is provided and cant be marked as optional with = null.
{flag:int=3?}
is the problem. it is either optional {flag:int?}
with the default value in the action or {flag:int=3}
.
[HttpGet]
Route("GetIssuesByFlag/{flag:int=3}/{categoryId:int?}/{tagIds?}")]
public IEnumerable<IssueDto> GetIssuesByFlag(int flag , int? categoryId = null, int?[] tagIds = null)
You currently have 3 optional parameters. when you have just the 1 value routing table wont know which optional parameter you are referring to, hence the 404
Use a query string.
[HttpGet]
[Route("GetIssuesByFlag/{flag:int=3?}")]
public IEnumerable<IssueDto> GetIssuesByFlag(int flag, List<int> tagIds, int? categoryId = null)
Url: /getissuesbyflag/1?tagIds=2,5,6&categoryId=56
You really should use query strings for optional parameters and path parameters if they are required.
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