php - Save (and retrieve) module configurations in Prestashop -

good day all. have simple module on prestashop, i'd add configuration flag, boolean value user can enable/disable configure module. easy. i've done "vikings" way, using form in tpl , read php post variables.

but i'd in proper way.

what i've far form, created in module:

protected function getconfigform()     {          return array(             'form' => array(                 'legend' => array(                 'title' => $this->l('settings'),                 'icon' => 'icon-cogs',                 ),                 'input' => array(                     array(                         'type' => 'switch',                         'label' => $this->l('a label'),                         'name' => 'multishop_language_mode',                         'is_bool' => true,                         'desc' => $this->l('use language on every shop'),                         'values' => array(                             array(                                 'id' => 'active_on',                                 'value' => true,                                 'label' => $this->l('enabled')                             ),                             array(                                 'id' => 'active_off',                                 'value' => false,                                 'label' => $this->l('disabled')                             )                         )                     )                  ),                 'submit' => array(                     'title' => $this->l('save'),                 ),             ),         ); } 

then got functions set , values:

protected function getconfigformvalues()     {         return array(             'multishop_language_mode' => configuration::get('multishop_language_mode', true)         );      }      /**      * save form data.      */     protected function postprocess()     {     configuration::updatevalue('multishop_language_mode', tools::getvalue('multishop_language_mode'));       } 

i'm forgetting something? because switch on form, never change, everytime reload form, switch on "false".

the db never change after submitting (saving) form.

thanks in advance.

update: db change, when submitting form, value of field become null

i've managed solve issue, don't know why, writing function in way makes works charm.

protected function getconfigformvalues()     {         return array(             'hreflangforprestashop_multishop_language_mode' => configuration::get('hreflangforprestashop_multishop_language_mode')          );      } 

note, i've deleted second parameter of return array, true