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    <p>If you use the searching toolbar you can use <a href="http://www.trirand.com/jqgridwiki/doku.php?id=wiki:toolbar_searching#calling_convention" rel="nofollow noreferrer">beforeSearch</a> callback to modify the <code>postData.filter</code>. In case of Singe Field searching or Advanced Searching you can use <a href="http://www.trirand.com/jqgridwiki/doku.php?id=wiki:singe_searching#options" rel="nofollow noreferrer">onSearch</a>.</p> <p>In <a href="https://stackoverflow.com/a/8953934/315935">the answer</a> you can see how the <code>postData.filter</code> can be modified.</p> <p><strong>UPDATED</strong>: You did something wrong in your tests. The only problem is that the current implementation of searching don't initialize <code>this</code> to the grid, but it's not explicitly documented somewhere.</p> <p>I created <a href="http://www.ok-soft-gmbh.com/jqGrid/ModifyFilterOnSearch.htm" rel="nofollow noreferrer">the demo</a> for you which demonstrate that you do can modify the filter before relaoding of the grid will be started. If you would search in the grid for 'Client' equal to 300 the search request will be modified to 'amount' equal to 300 and you would see the results</p> <p><img src="https://i.stack.imgur.com/6nKGj.png" alt="enter image description here"></p> <p>The corresponding code is</p> <pre class="lang-js prettyprint-override"><code>$('#list').jqGrid('navGrid', '#pager', {add: false, edit: false, del: false}, {}, {}, {}, { multipleSearch: true, overlay: 0, onSearch: function () { var i, l, rules, rule, $grid = $('#list'), postData = $grid.jqGrid('getGridParam', 'postData'), filters = $.parseJSON(postData.filters); if (filters &amp;&amp; typeof filters.rules !== 'undefined' &amp;&amp; filters.rules.length &gt; 0) { rules = filters.rules; for (i = 0; i &lt; rules.length; i++) { rule = rules[i]; if (rule.field === 'name') { // make modifications only for the 'contains' operation rule.field = 'amount'; } } postData.filters = JSON.stringify(filters); } }}); </code></pre>
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    1. COfirebug shows that onSearch is now being caught after the user finishes searching. postdata seems to be undefined however. `this` contains `odata[]` and other information about the form, but shows nothing about the data the user has submitted.
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    2. CO@Jaym: You did some error. I modified my answer and included the demo which shows how to implement modification of the searching filter inside of `onSearch`.
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    3. COThanks very much! I see what I did incorrectly and successfully edited the js. Your answers are always very helpful
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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