Craft\m160514_000000_retour_convertToElementId::safeUp PHP Méthode

    public function safeUp()
    {
        /* -- Rename the column in  the retour_static_redirects column */
        MigrationHelper::renameColumn('retour_static_redirects', 'associatedEntryId', 'associatedElementId');
        /* -- Rename the column in  the retour_redirects column */
        MigrationHelper::renameColumn('retour_redirects', 'associatedEntryId', 'associatedElementId');
        /* -- Drop the old fk */
        MigrationHelper::dropForeignKeyIfExists('retour_redirects', array('associatedElementId'));
        /* -- Add the new foreign key */
        $this->addForeignKey('retour_redirects', 'associatedElementId', 'elements', 'id', 'CASCADE', 'CASCADE');
        // return true and let craft know its done
        return true;
    }