haskell - How do I solve "HTTP request failed with: when is not a field" runtime errors in digestive-functors code? -


i have simple , incomplete happstack application, consists of digestive-functors form defined follows:

setrecformspec :: monad m => form text m reminder setrecformspec = reminder     <$> "progname" .: string nothing     <*> "channel" .: string nothing     <*> "when" .: localtimeformlet "%d/%m/%y" "%h:%m" nothing     <*> "recordlimit" .: stringread "can't parse number" (just 7)

and view defined follows:

setrecview :: view h.html -> h.html setrecview view =         h.div ! a.class_ "container" $             h.h1 "set record reminder"             childerrorlist "" view              divformgroup $                 label "progname" view "program name:"                 formcontrol $ inputtext "progname" view              divformgroup $                 label "channel" view "channel:"                 formcontrol $ inputtext "channel" view              divformgroup $                 label "when" view "when:"                 formcontrol $ inputdate "when" view              divformgroup $                 label "recordlimit" view "recording limit (days):"                 formcontrol $ inputtext "recordlimit" view              divformgroup $                 formcontrol $ inputsubmit "signup"  -- divformgroup -- candidate go bootstrap library divformgroup :: h.html -> h.html divformgroup h =     h.div ! a.class_ "form-group" $ h  -- formcontrol -- candidate go bootstrap library formcontrol :: h.html -> h.html formcontrol h = (h ! a.class_ "form-control")

reminder defined follows:

data reminder = reminder {         programname     :: string    -- ^ name of program     ,   channel         :: string    -- ^ name of broadcast channel     ,   firstshowing    :: localtime  -- ^ time of first showing     ,   timerperioddays :: integer     -- ^ how far in advance can set timer, in days } deriving (show)

when browse path form (/setrec) blank page following error message printed on console:

http request failed with: when not field

i've found error message defined (in https://github.com/jaspervdj/digestive-functors/blob/7e50d5686abc4b39389ed195693660d758987c7c/digestive-functors/src/text/digestive/form/internal.hs ) can't see there why 'when' field not found.

what problem here?

how debug kind of issue?

here's link whole code on github, in case need more @ code:

https://github.com/nmbooker/recremind

i ran same error when used utctimeformlet, internally calls localtimeformlet same error experienced.

take @ code of localtimeformlet

localtimeformlet dfmt tfmt d = localtime   <$> "date" .: dateformlet dfmt (localday <$> d)   <*> "time" .: timeformlet tfmt (localtimeofday <$> d)

as can see consists of 2 subformlets, reason why "when" not field. refers overall construct "date" , "time" being actual fields.

the "solution" used skip function entirely since needed date, not precise time. if that's same in case want so, too.

otherwise have incorporate 2 fields view , should work.


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