[web-devel] confusion over yesod-forms-0.2.0
michael at schmong.org
Thu Jun 23 04:24:14 CEST 2011
In this case the error was straightforwardly indicating the problem
and is now fixed. Derp.
On Wed, Jun 22, 2011 at 6:52 PM, Michael Litchard <michael at schmong.org> wrote:
> I installed the new yesod-forms-0.2.0
> I tried out the sample program hello-forms.hs. The new changes work
> just fine. No problems. I don't understand some of the notation, but
> that didn't stop me from using yesod-form prior to the changes. I
> copied the style of hello-form
> exactly, I think. But I got a compile error. I don't think the error
> indicates the actual problem, and I suspect I have left out something.
> Below is a link to hello-form, the code I am trying to compile and the
> error I get. I would appreciate any insight offered.
> No instance for (RenderMessage Aframe FormMessage)
> arising from a use of `selectField'
> Possible fix:
> add an instance declaration for (RenderMessage Aframe FormMessage)
> In the first argument of `areq', namely `(selectField tests)'
> In the second argument of `(<*>)', namely
> `areq (selectField tests) "Pick a test" Nothing'
> In the second argument of `($)', namely
> `pure (,)
> areq (multiSelectField servers) "Pick some servers" Nothing
> areq (selectField tests) "Pick a test" Nothing'
More information about the web-devel