Mercurial > urweb

annotate tests/crud.ur @ 369:226c977faa9c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Crud indented properly, except for <xml>...</xml> outside parens and sig/struct
author Adam Chlipala <adamc@hcoop.net>
date Thu, 16 Oct 2008 14:40:28 -0400
parents b6be16792584
children 4f75cc2e1373
rev   line source
adamc@339 1 con colMeta = fn t_formT :: (Type * Type) => {
adamc@369 2 Nam : string,
adamc@369 3 Show : t_formT.1 -> xbody,
adamc@369 4 Widget : nm :: Name -> xml form [] [nm = t_formT.2],
adamc@369 5 WidgetPopulated : nm :: Name -> t_formT.1 -> xml form [] [nm = t_formT.2],
adamc@369 6 Parse : t_formT.2 -> t_formT.1,
adamc@369 7 Inject : sql_injectable t_formT.1
adamc@369 8 }
adamc@339 9 con colsMeta = fn cols :: {(Type * Type)} => $(Top.mapT2T colMeta cols)
adamc@326 10
adamc@362 11 fun default (t ::: Type) (sh : show t) (rd : read t) (inj : sql_injectable t)
adamc@362 12 name : colMeta (t, string) =
adamc@362 13 {Nam = name,
adamc@362 14 Show = txt _,
adamc@368 15 Widget = fn nm :: Name => (<xml><textbox{nm}/></xml>),
adamc@362 16 WidgetPopulated = fn (nm :: Name) n =>
adamc@368 17 (<xml><textbox{nm} value={show _ n}/></xml>),
adamc@369 18 Parse = readError _,
adamc@362 19 Inject = _}
adamc@362 20
adamc@362 21 val int = default _ _ _
adamc@362 22 val float = default _ _ _
adamc@362 23 val string = default _ _ _
adamc@362 24
adamc@362 25 fun bool name = {Nam = name,
adamc@362 26 Show = txt _,
adamc@368 27 Widget = fn nm :: Name => (<xml><checkbox{nm}/></xml>),
adamc@362 28 WidgetPopulated = fn (nm :: Name) b =>
adamc@368 29 (<xml><checkbox{nm} checked={b}/></xml>),
adamc@362 30 Parse = fn x => x,
adamc@362 31 Inject = _}
adamc@362 32
adamc@325 33 functor Make(M : sig
adamc@369 34 con cols :: {(Type * Type)}
adamc@369 35 constraint [Id] ~ cols
adamc@369 36 val tab : sql_table ([Id = int] ++ mapT2T fstTT cols)
adamc@325 37
adamc@369 38 val title : string
adamc@325 39
adamc@369 40 val cols : colsMeta cols
adamc@369 41 end) = struct
adamc@325 42
adamc@325 43 open constraints M
adamc@325 44 val tab = M.tab
adamc@325 45
adamc@339 46 sequence seq
adamc@339 47
adamc@339 48 fun create (inputs : $(mapT2T sndTT M.cols)) =
adamc@367 49 id <- nextval seq;
adamc@367 50 () <- dml (insert tab
adamc@367 51 (foldT2R2 [sndTT] [colMeta]
adamc@367 52 [fn cols => $(mapT2T (fn t :: (Type * Type) =>
adamc@367 53 sql_exp [] [] [] t.1) cols)]
adamc@367 54 (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@367 55 [[nm] ~ rest] =>
adamc@367 56 fn input col acc => acc with nm = sql_inject col.Inject (col.Parse input))
adamc@367 57 {} [M.cols] inputs M.cols
adamc@367 58 with #Id = (SQL {id})));
adamc@367 59 return <xml><body>
adamc@367 60 Inserted with ID {txt _ id}.
adamc@367 61 </body></xml>
adamc@339 62
adamc@342 63 fun save (id : int) (inputs : $(mapT2T sndTT M.cols)) =
adamc@367 64 () <- dml (update [mapT2T fstTT M.cols]
adamc@367 65 (foldT2R2 [sndTT] [colMeta]
adamc@367 66 [fn cols => $(mapT2T (fn t :: (Type * Type) =>
adamc@369 67 sql_exp [T = [Id = int]
adamc@369 68 ++ mapT2T fstTT M.cols]
adamc@369 69 [] [] t.1) cols)]
adamc@367 70 (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@367 71 [[nm] ~ rest] =>
adamc@369 72 fn input col acc => acc with nm =
adamc@369 73 sql_inject col.Inject (col.Parse input))
adamc@367 74 {} [M.cols] inputs M.cols)
adamc@367 75 tab (WHERE T.Id = {id}));
adamc@367 76 return <xml><body>
adamc@367 77 Saved!
adamc@367 78 </body></xml>
adamc@341 79
adamc@341 80 fun update (id : int) =
adamc@367 81 fso <- oneOrNoRows (SELECT tab.{{mapT2T fstTT M.cols}} FROM tab WHERE tab.Id = {id});
adamc@367 82 case fso : (Basis.option {Tab : $(mapT2T fstTT M.cols)}) of
adamc@367 83 None => return <xml><body>Not found!</body></xml>
adamc@367 84 | Some fs => return <xml><body><form>
adamc@369 85 {foldT2R2 [fstTT] [colMeta] [fn cols :: {(Type * Type)} => xml form [] (mapT2T sndTT cols)]
adamc@369 86 (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@369 87 [[nm] ~ rest] (v : t.1) (col : colMeta t)
adamc@369 88 (acc : xml form [] (mapT2T sndTT rest)) =>
adamc@369 89 <xml>
adamc@369 90 <li> {cdata col.Nam}: {col.WidgetPopulated [nm] v}</li>
adamc@369 91 {useMore acc}
adamc@369 92 </xml>)
adamc@369 93 <xml/>
adamc@369 94 [M.cols] fs.Tab M.cols}
adamc@341 95
adamc@369 96 <submit action={save id}/>
adamc@367 97 </form></body></xml>
adamc@341 98
adamc@337 99 fun delete (id : int) =
adamc@367 100 () <- dml (DELETE FROM tab WHERE Id = {id});
adamc@367 101 return <xml><body>
adamc@368 102 The deed is done.
adamc@367 103 </body></xml>
adamc@337 104
adamc@360 105 fun confirm (id : int) = return <xml><body>
adamc@369 106 <p>Are you sure you want to delete ID #{txt _ id}?</p>
adamc@367 107
adamc@369 108 <p><a link={delete id}>I was born sure!</a></p>
adamc@360 109 </body></xml>
adamc@337 110
adamc@346 111 fun main () =
adamc@367 112 rows <- queryX (SELECT * FROM tab AS T)
adamc@367 113 (fn (fs : {T : $([Id = int] ++ mapT2T fstTT M.cols)}) => <xml>
adamc@369 114 <tr>
adamc@369 115 <td>{txt _ fs.T.Id}</td>
adamc@369 116 {foldT2RX2 [fstTT] [colMeta] [tr]
adamc@369 117 (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@369 118 [[nm] ~ rest] v col => <xml>
adamc@369 119 <td>{col.Show v}</td>
adamc@369 120 </xml>)
adamc@369 121 [M.cols] (fs.T -- #Id) M.cols}
adamc@369 122 <td>
adamc@369 123 <a link={update fs.T.Id}>[Update]</a>
adamc@369 124 <a link={confirm fs.T.Id}>[Delete]</a>
adamc@369 125 </td>
adamc@369 126 </tr>
adamc@369 127 </xml>);
adamc@367 128 return <xml><head>
adamc@367 129 <title>{cdata M.title}</title>
adamc@367 130 </head><body>
adamc@325 131
adamc@369 132 <h1>{cdata M.title}</h1>
adamc@325 133
adamc@369 134 <table border={1}>
adamc@369 135 <tr>
adamc@369 136 <th>ID</th>
adamc@369 137 {foldT2RX [colMeta] [tr]
adamc@369 138 (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@369 139 [[nm] ~ rest] col => <xml>
adamc@367 140 <th>{cdata col.Nam}</th>
adamc@367 141 </xml>)
adamc@369 142 [M.cols] M.cols}
adamc@369 143 </tr>
adamc@369 144 {rows}
adamc@369 145 </table>
adamc@339 146
adamc@369 147 <br/>
adamc@339 148
adamc@369 149 <form>
adamc@369 150 {foldT2R [colMeta] [fn cols :: {(Type * Type)} => xml form [] (mapT2T sndTT cols)]
adamc@369 151 (fn (nm :: Name) (t :: (Type * Type)) (rest :: {(Type * Type)})
adamc@369 152 [[nm] ~ rest] (col : colMeta t) (acc : xml form [] (mapT2T sndTT rest)) => <xml>
adamc@367 153 <li> {cdata col.Nam}: {col.Widget [nm]}</li>
adamc@367 154 {useMore acc}
adamc@367 155 </xml>)
adamc@369 156 <xml/>
adamc@369 157 [M.cols] M.cols}
adamc@369 158
adamc@369 159 <submit action={create}/>
adamc@369 160 </form>
adamc@367 161 </body></xml>
adamc@325 162
adamc@325 163 end