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I m creating custom option programatically using observer with catalog_product_save_before event.Custom option created successfully on product save.but the problem is whenever product save second time it will create same option on every save action.So i want to remove all the option first before save and recreate all the option on save.My observer code for creating custom option is as below

public function createMyCustomOption(Varien_Event_Observer $observer)

{

    //Mage::getSingleton('catalog/product_option')->unsetOptions();

    $this->saveProductTabData($observer);

    $product = $observer->getProduct();

    $globlaOptions = unserialize(Mage::getStoreConfig("toursection/tourgroup/product_option"));

    $globlaOptionsArray = array();

    foreach ($globlaOptions as $key=>$value){

        $item['optiontitle'] = $value['optiontitle'];

        $item['optionprice'] = $value['optionprice'];

        $globlaOptionsArray = $item;

    }

    //print_r($globlaOptionsArray);



    //print_r($options);exit;



        $options = $product->getProductOptions();

    echo '<pre>';



      print_r($options);exit;

        /*if ($options) {

            foreach ($options as $option) {

                if ($option['title'] == 'Adult' || $option['title'] == 'Child') {

                    return;

                }

            }

        }*/



        $noOfAdult         = Mage::getStoreConfig("toursection/tourgroup/noofadult");

        $noOfchild         = Mage::getStoreConfig("toursection/tourgroup/nofochild");

        $adultPrice    = $product->getAdultOurprice();

        $childPrice    = $product->getChildOurprice();

        if(!$product_id = Mage::app()->getRequest()->getParam('id')){

                $productModel = Mage::getModel('catalog/product');

                $product_entity_table = $productModel->getResource()->getEntityTable();    

                $resource = Mage::getSingleton('core/resource');

                $connection = $resource->getConnection('core_read');

                $result = $connection->showTableStatus($product_entity_table);

                $product_id = $result['Auto_increment'];

            }

        $optionModel = Mage::getModel('touroptions/touroptions')->load($product_id,'product_id');

        $tourOptionArray = unserialize($optionModel->getTouroptions());

        print_r($tourOptionArray);

        $optionsTitle = array('Adult','Child');

        $optionsPrice = array($adultPrice,$childPrice);

        $noOfOption = array(

            $noOfAdult,

            $noOfchild

        );

        $optionsSku = array(NULL,NULL);

        $isRequired    = array(

            1

        );

        $typeArray = array(

        'drop_down',

        'drop_down'

        );

        $inc = 0;

        foreach($globlaOptionsArray as $title){

            if(!in_array($title['optiontitle'],$tourOptionArray)){

                continue;

            }

            $optionsTitle=$title['optiontitle'];

            $optionsPrice=$title['optionprice'];

            $noOfOption = '1';

            $optionsSku = $tourOptionArray['optionsku'][$inc];

            $isRequired = 0;

            $typeArray = 'checkbox';

            $inc++;



        }





        $optionsArray  = $this->getOptions($optionsTitle, $typeArray, $noOfOption, $optionsPrice, $isRequired , $optionsSku);

        //echo '<pre>';

        //print_r($optionsArray);exit;

        try {

            $product->setCanSaveCustomOptions(true);

            foreach ($optionsArray as $option) {

                $product->getOptionInstance()->addOption($option);

            }

            $product->setHasOptions(true);

        }

        catch (Exception $e) {

            Mage::Log($e->getMessage());

        }







}

protected function getOptions($optionsTitle = '', $typeArray = '', $noOfOption, $optionsPrice, $isRequired, $optionsSku)

{



    if (is_array($optionsTitle)) {

        $j = 0;

        foreach ($optionsTitle as $ttl) {

            $option[$j]               = array();

            $optionvalue              = array();

            $option[$j]['title']      = $ttl;

            $option[$j]['type']       = $typeArray[$j];

            $option[$j]['is_require'] = $isRequired[$j];

            $option[$j]['sort_order'] = $j;

            for ($i = 1; $i <= $noOfOption[$j]; $i++) {

                $optionvalue[$i]['title']      = $i;

                $optionvalue[$i]['price']      = $i * $optionsPrice[$j];

                $optionvalue[$i]['price_type'] = 'fixed';

                $optionvalue[$i]['sku']        = $optionsSku[$j];

                $optionvalue[$i]['sort_order'] = $i;



            }

            $option[$j]['values'] = $optionvalue;

            $j++;

        }

    } 

    return $option;

}

any help would be much appreciated.
Thanks.

Try this before adding your new options:

$oldOptions = $product->getOptionInstance()->getOptions();

foreach ($oldOptions as $option){

    $option->setIsDelete(true);

}

I just had the same problem, the answer from marius did not work for me. I got "Call to a member function setIsDelete() on a non-object" because $product->getOptionInstance()->getOptions() returns an array.

This is what worked for me:

$oldOptions = $product->getOptionInstance()->getOptions();

foreach ($oldOptions as $key => $option){

    if($option['title'] == "Custom Option Title") {

        $oldOptions[$key]['is_delete'] = 1;                 

        $product->getOptionInstance()->addOption($oldOptions[$key]);

    }

}

After deleting you can add your updated custom option with this code:

$newOption = array(

    'title' => "Custom Option Title",

    'type' => 'radio',

    'is_require' => 1,

    'sort_order' => 20,

    'values' => array(

        array(

            'title' => "Value 1 Title",

            'price' => 42.00,

            'price_type' => 'fixed',

            'sku' => "",

            'sort_order' => '1'

        ),

        array(

            'title' => "Value 2 Title",

            'price' => 50,

            'price_type' => 'percent',

            'sku' => "",

            'sort_order' => '2'

        )

    )

);

$product->getOptionInstance()->addOption($newOption);