fix(formaswer): remove is_deleted column

this will drop the trash bin for this itemtype. It causes UI problems in the tab Form Answer of a form
and users are not able to purge deleted items

Signed-off-by: Thierry Bugier <tbugier@teclib.com>

inc/formanswer.class.php

@@ -114,6 +114,17 @@ public function canViewItem() {
       return false;
    }
 
+   public static function canPurge() {
+      return true;
+   }
+
+   public function canPurgeItem() {
+      $form = new PluginFormcreatorForm();
+      $formFk = PluginFormcreatorForm::getForeignKeyField();
+      $form->getFromDB($this->fields[$formFk]);
+      return $form->canPurgeItem();
+   }
+
    /**
     * Returns the type name with consideration of plural
     *

install/mysql/plugin_formcreator_empty.sql

@@ -69,7 +69,6 @@ CREATE TABLE IF NOT EXISTS `glpi_plugin_formcreator_formanswers` (
   `request_date` datetime NOT NULL,
   `status` enum('waiting','refused','accepted') NOT NULL DEFAULT 'waiting',
   `comment` text,
-  `is_deleted` tinyint(1) NOT NULL DEFAULT '0',
   PRIMARY KEY (`id`),
   INDEX `plugin_formcreator_forms_id` (`plugin_formcreator_forms_id`),
   INDEX `entities_id_is_recursive` (`entities_id`, `is_recursive`),

install/upgrade_to_2.7.php

@@ -105,6 +105,8 @@ public function upgrade(Migration $migration) {
       }
       $table = 'glpi_plugin_formcreator_formanswers';
       $migration->renameTable('glpi_plugin_formcreator_forms_answers', $table);
+      $migration->migrationOneTable($table);
+      $migration->dropField($table, 'is_deleted');
       $table = 'glpi_plugin_formcreator_answers';
       $migration->changeField(
          $table,