Mercurial > urweb
view demo/batchFun.ur @ 1739:c414850f206f
Add support for -boot flag, which allows in-tree execution of Ur/Web
The boot flag rewrites most hardcoded paths to point to the build
directory, and also forces static compilation. This is convenient
for developing Ur/Web, or if you cannot 'sudo make install' Ur/Web.
The following changes were made:
* Header files were moved to include/urweb instead of include;
this lets FFI users point their C_INCLUDE_PATH at this directory
at write <urweb/urweb.h>. For internal Ur/Web executables,
we simply pass -I$PATH/include/urweb as normal.
* Differentiate between LIB and SRCLIB; SRCLIB is Ur and JavaScript
source files, while LIB is compiled products from libtool. For
in-tree compilation these live in different places.
* No longer reference Config for paths; instead use Settings; these
settings can be changed dynamically by Compiler.enableBoot ()
(TODO: add a disableBoot function.)
* config.h is now generated directly in include/urweb/config.h,
for consistency's sake (especially since it gets installed
along with the rest of the headers!)
* All of the autotools build products got updated.
* The linkStatic field in protocols now only contains the name of the
build product, and not the absolute path.
Future users have to be careful not to reference the Settings files
to early, lest they get an old version (this was the source of two
bugs during development of this patch.)
author | Edward Z. Yang <ezyang@mit.edu> |
---|---|
date | Wed, 02 May 2012 17:17:57 -0400 |
parents | 68429cfce8db |
children | 6bc2a8cb3a67 |
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con colMeta = fn (db :: Type, state :: Type) => {Nam : string, Show : db -> xbody, Inject : sql_injectable db, NewState : transaction state, Widget : state -> xbody, ReadState : state -> transaction db} con colsMeta = fn cols => $(map colMeta cols) fun default [t] (sh : show t) (rd : read t) (inj : sql_injectable t) name : colMeta (t, source string) = {Nam = name, Show = txt, Inject = _, NewState = source "", Widget = fn s => <xml><ctextbox source={s}/></xml>, ReadState = fn s => v <- get s; return (readError v)} val int = default val float = default val string = default functor Make(M : sig con cols :: {(Type * Type)} constraint [Id] ~ cols val fl : folder cols table tab : ([Id = int] ++ map fst cols) val title : string val cols : colsMeta cols end) = struct val t = M.tab datatype list t = Nil | Cons of t * list t fun allRows () = query (SELECT * FROM t) (fn r acc => return (Cons (r.T, acc))) Nil fun add r = dml (insert t (@foldR2 [fst] [colMeta] [fn cols => $(map (fn t => sql_exp [] [] [] t.1) cols)] (fn [nm :: Name] [t ::_] [rest ::_] [[nm] ~ rest] input col acc => acc ++ {nm = @sql_inject col.Inject input}) {} M.fl (r -- #Id) M.cols ++ {Id = (SQL {[r.Id]})})) fun doBatch ls = case ls of Nil => return () | Cons (r, ls') => add r; doBatch ls' fun del id = dml (DELETE FROM t WHERE t.Id = {[id]}) fun show withDel lss = let fun show' ls = case ls of Nil => <xml/> | Cons (r, ls) => <xml> <tr> <td>{[r.Id]}</td> {@mapX2 [colMeta] [fst] [_] (fn [nm :: Name] [p ::_] [rest ::_] [[nm] ~ rest] m v => <xml><td>{m.Show v}</td></xml>) M.fl M.cols (r -- #Id)} {if withDel then <xml><td><button value="Delete" onclick={rpc (del r.Id)}/></td></xml> else <xml/>} </tr> {show' ls} </xml> in <xml><dyn signal={ls <- signal lss; return <xml><table> <tr> <th>Id</th> {@mapX [colMeta] [tr] (fn [nm :: Name] [p ::_] [rest ::_] [[nm] ~ rest] m => <xml><th>{[m.Nam]}</th></xml>) M.fl M.cols} </tr> {show' ls} </table></xml>}/></xml> end fun main () = lss <- source Nil; batched <- source Nil; id <- source ""; inps <- @foldR [colMeta] [fn r => transaction ($(map snd r))] (fn [nm :: Name] [p ::_] [rest ::_] [[nm] ~ rest] m acc => s <- m.NewState; r <- acc; return ({nm = s} ++ r)) (return {}) M.fl M.cols; let fun add () = id <- get id; vs <- @foldR2 [colMeta] [snd] [fn r => transaction ($(map fst r))] (fn [nm :: Name] [p ::_] [rest ::_] [[nm] ~ rest] m s acc => v <- m.ReadState s; r <- acc; return ({nm = v} ++ r)) (return {}) M.fl M.cols inps; ls <- get batched; set batched (Cons ({Id = readError id} ++ vs, ls)) fun exec () = ls <- get batched; rpc (doBatch ls); set batched Nil in return <xml><body> <h2>Rows</h2> {show True lss} <button value="Update" onclick={ls <- rpc (allRows ()); set lss ls}/><br/> <br/> <h2>Batch new rows to add</h2> <table> <tr> <th>Id:</th> <td><ctextbox source={id}/></td> </tr> {@mapX2 [colMeta] [snd] [_] (fn [nm :: Name] [p ::_] [rest ::_] [[nm] ~ rest] m s => <xml><tr> <th>{[m.Nam]}:</th> <td>{m.Widget s}</td> </tr></xml>) M.fl M.cols inps} <tr> <th/> <td><button value="Batch it" onclick={add ()}/></td> </tr> </table> <h2>Already batched:</h2> {show False batched} <button value="Execute" onclick={exec ()}/> </body></xml> end end