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@@ -28,3 +28,26 @@ So in order to avoid any fatal error, you must return an empty string (or anythi
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.. _`__toString`: http://www.php.net/manual/en/language.oop5.magic.php#object.tostring
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+
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+
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+Large filters and long urls problem
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+-------------------
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+
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+If you will try to add hundreds filters to single admin class, you will get a problem - very long filter form url generated.
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+In most cases you will get server response like *Error 400 Bad Request* OR *Error 414 Request-URI Too Long*. According to
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+http://stackoverflow.com/questions/417142/what-is-the-maximum-length-of-a-url-in-different-browsers
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+"safe" url length is just around 2000 characters.
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+You can fix this issue by adding simple JQuery code on your edit template
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+
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+.. code-block:: javascript
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+
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+ $(function() {
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+ // Add class 'had-value-on-load' to inputs/selects with values.
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+ $(".sonata-filter-form input").add(".sonata-filter-form select").each(function(){ if($(this).val()) { $(this).addClass('had-value-on-load')}})
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+ // REMOVE ALL EMPTY INPUT FROM FILTER FORM (except inputs, which has class 'had-value-on-load')
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+ $(".sonata-filter-form").submit(function() {
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+ $(".sonata-filter-form input").add(".sonata-filter-form select").each(function(){ if(!$(this).val() && !$(this).hasClass('had-value-on-load')) { $(this).remove()}})
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+ });
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+ });
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+
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+
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zhil