Error while trying to set deltaLink with no skipToken

[DiegoCont]

I'm trying to update my api to support delta link/token. When I return a nextLink for my first responses, it works fine, but for the final response, when I try to return a deltaLink along a deltaToken, I get this error: { "error": { "code": "InternalServerError", "message": "nextLink value without skip or skiptoken", "innerError": { "date": "2022-07-12T23:45:24", "request-id": "e8e9b13b-c838-41ce-9043-a8c4904c7759", "client-request-id": "e8e9b13b-c838-41ce-9043-a8c4904c7759" } } }

Assemblies affected

Microsoft.AspNetCore.OData 7.5.7

Reproduce steps

Create deltalink url as expected: NameValueCollection nameValues = HttpUtility.ParseQueryString(queryString); nameValues.Remove("$skipToken"); nameValues.Set("$deltatoken", continuationToken); Uri nextPageLink = new Uri(path + "?" + nameValues.ToString(), UriKind.Relative); oDataFeature.DeltaLink = nextPageLink ;

I see the URL is a correct url with a deltaToken.

Create PageResult (also correct result) return new PageResult( items: response.Items, nextPageLink: nextPageLink, count: count);

Expected result

response with a deltaLink along my deltaToken

Actual result

Error with message: "nextLink value without skip or skiptoken",

Additional detail

My guess is it's expecting a skipToken or skip value in order to return a nextLink but I don't want that I want a deltaLink, how do I fix this? I do not see a deltaLink property in PageResult

[corranrogue9]

@DiegoCont, are you accidentally including the nextLink as well in your final page? From the OData spec:

A page of results MUST NOT have both a deltaLink control information and a nextLink control information

If this is the issue, I think that we should change this error message, since it does not reflect the actual problem.

[DiegoCont]

@corranrogue9 I'm actually setting my deltaLink as the 'nextPAgeLink' property. I'm using this PageResult object https://github.com/OData/WebApi/blob/master/src/Microsoft.AspNet.OData.Shared/PageResult.cs and don't see a specific deltaLink property, so I set the nextPageResult to be my url with either a next or delta token. Basically, I'm doing it like this:

new PageResult( items: response.Items, nextPageLink: deltaLink, (this is the url I'm creating that has my deltaToken) count: count);

Is this the correct way to create a delta url? If not, could you please share an example on how to set the delta url? My logic to create next/delta link is basically the same, the main difference is either I add a delta or skip token (and the url type I want to return).