I’ve been having troubles with form_set_value(). I’ve extended the Search form, everything works, but after submission, the form values for those fields added by me return to default (see the code).

What am I doing wrong?

Thank you!

<? /**  * implementation of function hook_form_FORM_ID_alter  */ function myModule_form_search_form_alter( &$form, &$form_state, $form_id ){      $form['myM_options']['entity'] = array(                                             '#type' => 'radios',                                             '#title' => 'Search by',                                             '#default_value' => 'gene',                                             '#options' => array(                                                                 "gene" => "Genes",                                                                 "ortholog" => "Orthologs",                                                                 "microarray" => "Microarray Features"                                                             ),                                          );     $form['myM_options']['plant'] = array(                                             '#type' => 'checkboxes',                                             '#title' => 'Choose plants',                                             '#options' => formatPlants(),                                             // select all checkboxes by default                                             '#default_value' => array_keys(formatPlants()),                                         );     $form['#validate'][] = 'myModule_search_validate';     $form['#submit'][] = 'myModule_search_form_alter_submit'; } /**  * validation functoin  */ function myModule_search_validate( $form, &$form_state ){     // this works as expected     form_set_value($form['basic']['processed_keys'], trim($form_state['values']['keys']), $form_state);      // this doesn't !!!     form_set_value($form['myM_options']['entity'], $form_state['values']['entity'], $form_state);     form_set_value($form['myM_options']['plant'], array( 'id_1', 'id_2' ), $form_state); }