con colMeta' = fn t :: Type => {Show : t -> xbody}
con colMeta = fn cols :: {Type} => $(Top.mapTT colMeta' cols)
functor Make(M : sig
con cols :: {Type}
constraint [Id] ~ cols
val tab : sql_table ([Id = int] ++ cols)
val title : string
val cols : colMeta cols
end) = struct
open constraints M
val tab = M.tab
fun list () =
rows <- query (SELECT * FROM tab AS T)
(fn (fs : {T : $([Id = int] ++ M.cols)}) acc => return
{acc}
| {txt _ fs.T.Id} |
{foldTRX2 [idT] [colMeta'] [tr]
(fn (nm :: Name) (t :: Type) (rest :: {Type}) =>
[[nm] ~ rest] =>
fn v funcs =>
| {funcs.Show v} |
)
[M.cols] (fs.T -- #Id) M.cols}
) ;
return
List
List
fun main () : transaction page = return
{cdata M.title}
{cdata M.title}
List all rows
end