Mercurial > urweb
view demo/constraints.ur @ 1905:cd1cfecc8c72
Remove autogenerated config.h.in from version control
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
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.hgignore | 1 +
include/urweb/config.h.in | 104 ----------------------------------------------
2 files changed, 1 insertion(+), 104 deletions(-)
delete mode 100644 include/urweb/config.h.in
author | Anders Kaseorg <andersk@mit.edu> |
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date | Fri, 22 Nov 2013 09:36:14 -0500 |
parents | 74a090ff296e |
children |
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table t : { Id : int, Nam : string, Parent : option int } PRIMARY KEY Id, CONSTRAINT Nam UNIQUE Nam, CONSTRAINT Id CHECK Id >= 0, CONSTRAINT Parent FOREIGN KEY Parent REFERENCES t(Id) fun main () = list <- queryX (SELECT * FROM t) (fn r => <xml><tr> <td>{[r.T.Id]}</td> <td>{[r.T.Nam]}</td> <td>{case r.T.Parent of None => <xml>NULL</xml> | Some id => <xml>{[id]}</xml>}</td> </tr></xml>); return <xml><body> <table> <tr> <th>Id</th> <th>Name</th> <th>Parent</th> </tr> {list} </table> <form> <table> <tr> <th>Id:</th> <td><textbox{#Id}/></td> </tr> <tr> <th>Name:</th> <td><textbox{#Nam}/></td> </tr> <tr> <th>Parent:</th> <td><textbox{#Parent}/></td> </tr> <tr> <th/> <td><submit action={add}/></td> </tr> </table> </form> </body></xml> and add r = dml (INSERT INTO t (Id, Nam, Parent) VALUES ({[readError r.Id]}, {[r.Nam]}, {[case r.Parent of "" => None | s => Some (readError s)]})); main ()