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    <p>I know you have already solved the problem but I faced the same problem in my project and would like to offer my solution.</p> <p>First, I declare a custom formatter for my select column (in this case, the 'username' column).</p> <pre><code>$.extend($.fn.fmatter, { selectuser: function(cellvalue, options, rowdata) { var userdata; $.ajax({ url:'dropdowns/json/user', async:false, dataType:'json', cache:true, success: function(data) { userdata = data; } }); return typeof cellvalue != 'undefined' ? userdata[cellvalue] : cellvalue ; } }); </code></pre> <p>This formatter loads up the mapping of id and user in this case, and returns the username for the particular cellvalue. Then, I set the <code>formatter:'selectuser'</code> option to the column's <code>colModel</code>, and it works.</p> <p>Of course, this does one json request per row displayed in the grid. I solved this problem by setting 10 seconds of <a href="http://www.electrictoolbox.com/php-caching-headers/" rel="nofollow">caching</a> to the headers of my json responses, like so:</p> <pre><code>private function set_caching($seconds_to_cache = 10) { $ts = gmdate("D, d M Y H:i:s", time() + $seconds_to_cache) . " GMT"; header("Expires: $ts"); header("Pragma: cache"); header("Cache-Control: max-age=$seconds_to_cache"); } </code></pre> <p>I know this solution is not perfect, but it was adequate for my application. Cache hits are served by the browser instantly and the grid flows smoothly. Ultimately, I hope the built-in <code>select</code> formatter will be fixed to work with json data.</p>
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