davidsimpson

2008-04-29T09:28:34-00:00
DB_DataObject Feature/Change Request
Reported by davidsimpson
2008-04-29T09:28:34-00:00
PHP: 5.1.4 OS: Windows/ Linux/ Solaris Package Version: 1.8.8

Description:
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Would it be possible to add the field length information (currently shown in the comments added to the DB DataObject class files) to an associative array (fieldname => length), to allow for some simple data validation?

In particular this would be useful for varchar fields where the DataObject validation could be used prior to attempting to update the database.

I know that Request #6431 was for similar information and has been set to "Wont fix", but it would be much nicer to be able to hold the field lengths in the data object, as otherwise we either have to query the tableinfo on every update/insert, or catch errors from the database - neither of which seem particularly efficient?

Thanks for all your hard work on DB_DataObject - we have found it to be extremely useful in a number of projects now, using a variety of backend databases (mysql, oracle and postgres).

Test script:
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For example, in the _generateClassTable function 

prior to processing the columns add:

$fieldMaxLen = array();

while processing each column add:

if (isset($t->len) && ($t->type=="VARCHAR")) {
  $fieldMaxLen[] = "\"{$t->name}\" => {$t->len}";
}

and following the loop add:

$body .= "    // Array of varchar field max lengths for simple validation\n";
$body .= "    protected \$varcharsMax = array(".join($fieldMaxLen, ",\n\t\t\t\t\t\t\t\t\t").");";
PEAR Bug #13798

davidsimpson
