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    <p>Not really a complete answer to your question, but since comments don't have syntax formatting; here's a filter you can use to make your field values null if empty.</p> <pre><code>class My_Filter_NullIfEmpty implements Zend_Filter_Interface { public function filter( $value ) { // maybe you need to expand the conditions here if( 0 == strlen( $value ) ) { return null; } return $value; } } </code></pre> <p>About the required part: I'm not sure really. You could try to search the ZF mailinglists on Nabble:</p> <p><a href="http://www.nabble.com/Zend-Framework-Community-f16154.html" rel="nofollow noreferrer">http://www.nabble.com/Zend-Framework-Community-f16154.html</a></p> <p>Or subscribe to their mailinglist, and ask them the question. Either through Nabble, or directly via the addresses on framework.zend.com: <a href="http://tinyurl.com/y4f9lz" rel="nofollow noreferrer">http://tinyurl.com/y4f9lz</a></p> <p>Edit: Ok, so now I've done some tests myself, cause what you said all sounded counter intuitive to me. Your example works fine with me. This is what I've used:</p> <pre><code>&lt;?php class Form extends Zend_Form { public function init() { $title = new Zend_Form_Element_Text('title', array( 'label' =&gt; 'Title', 'required' =&gt; false, 'filters' =&gt; array( 'StringTrim', 'HtmlEntities', 'NullIfEmpty' // be sure this one is available ), 'validators' =&gt; array( array('StringLength', false, array(3, 100)) ), )); $this-&gt;addElement( $title ); } } $form = new Form(); $postValues = array( 'title' =&gt; '' ); // or $postValues = array( 'title' =&gt; ' ' ); // or $postValues = array( 'title' =&gt; 'ab' ); // or $postValues = array( 'title' =&gt; ' ab ' ); // or $postValues = array( 'title' =&gt; '&lt;abc&gt;' ); // all work perfectly fine with me // validate the form (which automatically sets the values in the form object) if( $form-&gt;isValid( $postValues ) ) { // retrieve the relevant value var_dump( $form-&gt;getValue( 'title' ) ); } else { echo 'form invalid'; } ?&gt; </code></pre>
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    1. COStill not a solution because you cannot leave required fields empty, so you will get an exception. And not required fields do not process filters and validators so it won't work there, too.
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    2. COI might have found your solution; the allowEmpty meta command, see: http://tinyurl.com/lcyadz Still, are you sure filters aren't being applied either if a field is not required? (I'll make a test myself later on, because I'm curious now) But that sounds pretty darn strange. http://framework.zend.com/manual/en/zend.filter.input.html#zend.filter.input.metacommands.allow-empty
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    3. COSo basically, to get what you want: set the field to required, apply your validators and filters, and apply my filter for the null if empty bit, and set the meta command to allowEmpty. That should do the trick (I think)
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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.

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