On Thu, 2009-04-30 at 11:06 +0200, Marcus Gnaß wrote:
> Troy Oltmanns wrote:
> > I have the code below being used to rifle through a list of available
> > categories and create select options for them. The code is being used to
> > query the database and compare the product category to the current
> > iteration, if there's a match, then add selected code so the category is
> > prechosen. More code (not included) does the saving and all that, I've check
> > phpmyadmin. But when the page submits, the old category appears in the drop
> > down as selected. If I leave the page and come back it's fine, it's just
> > right after it is saved. The form script is being used on itself, in that
> > there is only one file for the form, the submission, etc. All of the other
> > input elements will load the data after being saved, is it something
> > specific to dropdowns, or it is the way the code is being instatiated?
> >
> > All help is much appreciated. Please let me know if anymore info is needed.
> >
>
> //MAKE CATEGORIES DROPDOWN
>
> $catlist1 = "";
>
> // read product
> $catmatch = "SELECT prod_cat0 FROM product WHERE dbi='$dbi';";
> $catresult = mysql_query($catmatch);
> $catquery = mysql_fetch_array($catresult);
>
> // read categories
> $sql = "SELECT category FROM categories ORDER BY category;";
> $result = mysql_query($sql);
> while ($col2 = mysql_fetch_array($result)) {
>
> $id = $col2["category"];
>
> if ($id == $catquery['prod_cat0']){
>
> $catlist1 .= "<option value=\"$id\" selected=\"selected\">$id</option>";
>
> } else {
>
> $catlist1 .= "<option value=\"$id\">$id</option>";
>
> }
>
> }
>
> >
> > to instantiate <?=$catlist1?>
> >
>
> The only data you need from table product is the column prod_cat0, from
> table categories it's category, so you should read only the needed data
> instead of using * for better performance.
>
> Take the SQL and verify if it returns what you want it to return then.
>
I tend to do my loops like this:
while ($col2 = mysql_fetch_array($result))
{
$id = $col2["category"];
$selected =($id == $catquery['prod_cat0'])?'selected="selected"':'';
$catlist1 .= "<option value=\"$id\" $selected>$id</option>";
}
Just looks a little neater. 'Course, you could remove the $id line and
chuck the value straight into the short if statement there.
Ash
www.ashleysheridan.co.uk
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