Adding postData to / changing URL in jqGrid

[ThaDafinser]

From @webdevilopers on June 16, 2014 13:55

My grid starts on an URL that depends on a week GET param from an HTML5 element:
http://localhost:8000/timekeeping/overview?week=2010-W50

First I tried to add the week param to the postData:
The postData param is already implemented inside the layout:

    mtype : 'POST',
    postData: {
        <?php echo $parameterNames['columnsHidden']?>: function(){
            return $('#<?php echo $this->gridId.'_'.$parameterNames['columnsHidden']; ?>').val();
        },
        <?php echo $parameterNames['columnsGroupByLocal']?>: function(){
            return $('#<?php echo $this->gridId.'_'.$parameterNames['columnsGroupByLocal']; ?>').val();
        }
        <?php
        if(count($parametersHtml) > 0){
            echo ',';
        }
        echo implode(',', $parametersHtml);
        ?>,
    },

The imploded $parametersHtml can be found at the top:

$parametersHtml = array();
foreach($this->parameters as $name => $value){
    $parametersHtml []= $name.': \''.$value.'\'';
}

And then set the value on the grid:

        $grid->setParameters(array(
            'week' => (string) $weekParam,
                'week2' => '2014-W01',
            'foo' => 'bar',
            'foo2' => 'bar2'
        ));

Unfortunately the week param was not added to the POST request while the other params would. The problem seems to be that I already have a column named week too that is also used with groupingView.

I then tried to change the URL via:

        $url = $this->url()->fromRoute('timekeeping', array(
            'action' => 'overview',
            'week'   => $weekParam
        ));

$grid->setUrl($url);

But the grid seems to overwrite the URL at least inside the layout:

$url = $this->url(null, array(), array(), true);
if($this->overwriteUrl != ''){
    $url = $this->overwriteUrl;
}

In the end I came up with an individual layout template simply commenting out the mentioned section:

// $url = $this->url(null, array(), array(), true);
// if($this->overwriteUrl != ''){
//     $url = $this->overwriteUrl;
// }
$url = $this->url;

Though it did not end with the expected result because the URL now is completey empty:

var grid_defaultGrid = $('#defaultGrid').jqGrid({

    url: '',

Any ideas?

Copied from original issue: ThaDafinser/ZfcDatagrid#117