Mercurial > urweb
diff demo/more/orm1.ur @ 991:b132f8620a66
Initial Orm1 demo
| author | Adam Chlipala <adamc@hcoop.net> |
|---|---|
| date | Tue, 06 Oct 2009 10:34:27 -0400 |
| parents | |
| children | b825d843b22d |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/demo/more/orm1.ur Tue Oct 06 10:34:27 2009 -0400 @@ -0,0 +1,38 @@ +open Orm + +structure T = Table(struct + val cols = {A = local [int] _, + B = local [string] _} + end) + +structure S = Table(struct + val cols = {C = T.id, + D = local [float] _} + end) + +fun action () = + r <- T.create {A = 3, B = "Hi"}; + T.save (r -- #B ++ {B = "Bye"}); + + s <- S.create {C = r.Id, D = 45.67}; + + ls <- T.list; + ls' <- T.search (T.eq T.cols.B.Col "Hi"); + + lsS <- S.list; + lsS <- List.mapM (fn r => p <- S.cols.C.Parent r; return (r, p)) lsS; + + return <xml><body> + {List.mapX (fn r => <xml><li> {[r.A]}: {[r.B]}</li></xml>) ls} + <br/> + {List.mapX (fn r => <xml><li> {[r.A]}: {[r.B]}</li></xml>) ls'} + <br/> + {List.mapX (fn (s, ro) => <xml><li> {[s.D]}: {case ro of + None => <xml>No parent</xml> + | Some r => <xml>{[r.B]}</xml>} + </li></xml>) lsS} + </body></xml> + +fun main () = return <xml><body> + <form><submit action={action}/></form> +</body></xml>