I want to override the canonicalUrl when using meta-fields tag. is it possible?

[keba74]

Im trying to update the canonicalUrl before the tag is used and hoping that it will take my new canonicalUrl.

The umbraco page im using has a pager component, which adds "page={pagenr}" to the url, and i want the canonical to contain it also

:
rel="https://mysuper.domain/pagewithpager?page=10" instead of "https://mysuper.domain/pagewithpager"

The code i guessed at is something like :
{
var metaTags = metaFieldsService.Get(Model, true);
metaTags.SetValue("canonicalUrl", "I want to add something more to the url depending on something");
}

but nothing is updated. If i debug i see the metaTags do get my change but I assume the when the tag is rendering it gathers its own data again ignoring what im trying to do.

Is there any way i can update the canonicalUrl so that meta-fields will write out what i want at rendering time?

I get i could just write my own logic and read from the same metaTags service data, but for just changing 1 item it would be nice to not have to :)