Search issue with dynamic dropdown array - PHP

Question

I'm currently trying to set up a search with a couple of
dynamic dropdowns, basically to search for cars - so the parent
list is car make, and the child is car model.
I've gotten as far as a page with the dynamic array working,
but not the search :
dynamic array
working
(Ignore the cars and vans radio buttons)
For testing there's an Audi A3 and and Audi A6, but this
search doesn't work.
The select code looks like :
<select name="Model">
<option value="" <?php if (!(strcmp("",
$row_rsModels['Model']))) {echo "selected=\"selected\"";}
?>>Select a Model</option>
</select>
And the array code looks like :
<?php
if ($row_rsModels) {
echo "<SC" . "RIPT>\n";
echo "var WAJA = new Array();\n";
$oldmainid = 0;
$newmainid = $row_rsModels["Make"];
if ($oldmainid == $newmainid) {
$oldmainid = "";
$n = 0;
while ($row_rsModels) {
if ($oldmainid != $newmainid) {
echo "WAJA[".$n."] = new Array();\n";
echo "WAJA[".$n."][0] = '".WA_DD_Replace($newmainid)."';\n";
$m = 1;
echo "WAJA[".$n."][".$m."] = new Array();\n";
echo "WAJA[".$n."][".$m."][0] =
"."'".WA_DD_Replace($row_rsModels["ModelID"])."'".";\n";
echo "WAJA[".$n."][".$m."][1] =
"."'".WA_DD_Replace($row_rsModels["Model"])."'".";\n";
$m++;
if ($oldmainid == 0) {
$oldmainid = $newmainid;
$oldmainid = $newmainid;
$row_rsModels = mysql_fetch_assoc($rsModels);
if ($row_rsModels) {
$newmainid = $row_rsModels["Make"];
if ($oldmainid != $newmainid) {
$n++;
echo "var rsModels_WAJA = WAJA;\n";
echo "WAJA = null;\n";
echo "</SC" . "RIPT>\n";
function WA_DD_Replace($startStr) {
$startStr = str_replace("'", "|WA|", $startStr);
$startStr = str_replace("\\", "\\\\", $startStr);
$startStr = preg_replace("/[\r\n]{1,}/", " ", $startStr);
return $startStr;
?>
..to try and find the root of the problem, I've gotten as far
as a similar page, without the dynamic
array, with the child dropdown populated dynaically from the
recordset :
search working
This seems to work exactly as advertised - all the car models
are listed from the recordset, and if
you search for Audi and A3, then it gets returned correctly.
The select code here looks like :
<select name="Model" id="Model">
<option value="">Select a Model</option>
<?php
do {
?>
<option value="<?php echo
$row_rsModels['Model']?>"><?php echo
$row_rsModels['Model']?
></option>
<?php
} while ($row_rsModels = mysql_fetch_assoc($rsModels));
$rows = mysql_num_rows($rsModels);
if($rows > 0) {
mysql_data_seek($rsModels, 0);
$row_rsModels = mysql_fetch_assoc($rsModels);
?>
</select>
..so I guess the search is set up OK, but the issue is with
how to pass the model from the select code generated by the dynamic
array correctly....
Its presumably because the option value is empty :
<option value="" <?php if (!(strcmp("",
$row_rsModels['Model']))) {echo "selected=\"selected\"";}
?>>Select a Model</option>
So I've been trying various possibilities with no joy, such
as :
<?php if (!(strcmp("", $row_rsModels['Model']))) {echo
"selected=\"selected\"";} ?>
but without success.
Even then, I'd have though if the value was empty, "", then
it would return all results, rather than no results....?
hope that makes some sense, and someone can shed some
light...
Cheers.

Answer 1

Thomas Jung wrote:>
> >
Chris Paine wrote:
> > That's a shame!
> >
> > Does this mean that using a drop down by index in an ALV is limited to having the same dropdown in every row of the table (it would certainly seem that this is the case).
> >
> > Cheers,
> >
> > Chris
>
> I would assume so as I can't think of a way around the subnode limitation. The system will actually allow you to have a subnode and everything works fine until you sort the ALV - then you get a short dump.
>
> I suppose you would have to fall back to using a regular table in this case.
But how come the class documentation says its possible.
Functionality
Using class CL_SALV_WD_UIE_DROPDOWN_BY_IDX, you make all the settings for the UI element index-based dropdown list box, from which the user can select from a range of values.
*You use the index-based dropdown list box if the dropdown list boxes in each cell of the column are to contain different entries.*
You use the key-based dropdown list box if the dropdown list boxes in each cell of the column are to contain the same entries.
To specify the entries in the dropdown list boxes, the context of your application requires an attribute for which the data type satisfies the following requirements:
The attribute is a table
The structure of this table contains at least one KEY column and a VALUE column.
Note
We recommend that you use the type WDY_KEY_VALUE_TABLE here.