Ur/Web: demo/sql.ur annotate

annotate demo/sql.ur @ 481:2280193bf298

Better detection of [let] substitution opportunities

author	Adam Chlipala <adamc@hcoop.net>
date	Sat, 08 Nov 2008 16:47:04 -0500
parents	20fab0e96217
children	1a317a707d71

rev	line source
adamc@410	1 table t : { A : int, B : float, C : string, D : bool }
adamc@410	2
adamc@410	3 fun list () =
adamc@410	4 rows <- queryX (SELECT * FROM t)
adamc@410	5 (fn row => <xml><tr>
adamc@410	6 <td>{[row.T.A]}</td> <td>{[row.T.B]}</td> <td>{[row.T.C]}</td> <td>{[row.T.D]}</td>
adamc@410	7 <td><a link={delete row.T.A}>[delete]</a></td>
adamc@410	8 </tr></xml>);
adamc@410	9 return <xml>
adamc@410	10 <table border=1>
adamc@410	11 <tr> <th>A</th> <th>B</th> <th>C</th> <th>D</th> </tr>
adamc@410	12 {rows}
adamc@410	13 </table>
adamc@410	14
adamc@410	15 <br/><hr/><br/>
adamc@410	16
adamc@410	17 <form>
adamc@410	18 <table>
adamc@410	19 <tr> <th>A:</th> <td><textbox{#A}/></td> </tr>
adamc@410	20 <tr> <th>B:</th> <td><textbox{#B}/></td> </tr>
adamc@410	21 <tr> <th>C:</th> <td><textbox{#C}/></td> </tr>
adamc@410	22 <tr> <th>D:</th> <td><checkbox{#D}/></td> </tr>
adamc@410	23 <tr> <th/> <td><submit action={add} value="Add Row"/></td> </tr>
adamc@410	24 </table>
adamc@410	25 </form>
adamc@410	26 </xml>
adamc@410	27
adamc@410	28 and add r =
adamc@434	29 dml (INSERT INTO t (A, B, C, D)
adamc@471	30 VALUES ({[readError r.A]}, {[readError r.B]}, {[r.C]}, {[r.D]}));
adamc@410	31 xml <- list ();
adamc@410	32 return <xml><body>
adamc@410	33 <p>Row added.</p>
adamc@410	34
adamc@410	35 {xml}
adamc@410	36 </body></xml>
adamc@410	37
adamc@410	38 and delete a =
adamc@434	39 dml (DELETE FROM t
adamc@471	40 WHERE t.A = {[a]});
adamc@410	41 xml <- list ();
adamc@410	42 return <xml><body>
adamc@410	43 <p>Row deleted.</p>
adamc@410	44
adamc@410	45 {xml}
adamc@410	46 </body></xml>
adamc@410	47
adamc@410	48 fun main () =
adamc@410	49 xml <- list ();
adamc@410	50 return <xml><body>
adamc@410	51 {xml}
adamc@410	52 </body></xml>

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