adamc@336: con colMeta' = fn t :: Type => {Nam : string, Show : t -> xbody}
adamc@329: con colMeta = fn cols :: {Type} => $(Top.mapTT colMeta' cols)
adamc@326:
adamc@325: functor Make(M : sig
adamc@325: con cols :: {Type}
adamc@325: constraint [Id] ~ cols
adamc@325: val tab : sql_table ([Id = int] ++ cols)
adamc@325:
adamc@325: val title : string
adamc@325:
adamc@327: val cols : colMeta cols
adamc@325: end) = struct
adamc@325:
adamc@325: open constraints M
adamc@325: val tab = M.tab
adamc@325:
adamc@337: fun delete (id : int) =
adamc@337: () <- dml (DELETE FROM tab WHERE Id = {id});
adamc@337: return
adamc@337: The deed is done.
adamc@337:
adamc@337:
adamc@337: fun confirm (id : int) = return
adamc@337: Are you sure you want to delete ID #{txt _ id}?
adamc@337:
adamc@337: I was born sure!
adamc@337:
adamc@337:
adamc@334: fun main () : transaction page =
adamc@334: rows <- queryX (SELECT * FROM tab AS T)
adamc@334: (fn (fs : {T : $([Id = int] ++ M.cols)}) =>
adamc@326:
adamc@326: | {txt _ fs.T.Id} |
adamc@332: {foldTRX2 [idT] [colMeta'] [tr]
adamc@329: (fn (nm :: Name) (t :: Type) (rest :: {Type}) =>
adamc@326: [[nm] ~ rest] =>
adamc@336: fn v col =>
adamc@336: | {col.Show v} |
adamc@326:
)
adamc@326: [M.cols] (fs.T -- #Id) M.cols}
adamc@337: [Delete] |
adamc@326:
adamc@334: );
adamc@325: return
adamc@334: {cdata M.title}
adamc@325:
adamc@325:
adamc@325:
adamc@334: {cdata M.title}
adamc@325:
adamc@325:
adamc@336:
adamc@336: | ID |
adamc@336: {foldTRX [colMeta'] [tr]
adamc@336: (fn (nm :: Name) (t :: Type) (rest :: {Type}) =>
adamc@336: [[nm] ~ rest] =>
adamc@336: fn col =>
adamc@336: | {cdata col.Nam} |
adamc@336:
)
adamc@336: [M.cols] M.cols}
adamc@336:
adamc@325: {rows}
adamc@325:
adamc@325:
adamc@325:
adamc@325: end