当用户输入增值税时，Magento 1.9会在结帐时免除税款 [英] Magento 1.9 remove tax on checkout when user enter VAT

问题描述

当用户在结帐时输入增值税号时，我正在尝试进行magento修改.从订单中删除税款.

I'm trying to make magento modification when user enter vat number on checkout remove tax from order.

我在stackoverflow上找到了一个支持magento较旧版本的代码，但不适用于新版本1.9 ，

我对工作条件做了一些修改，并返回0，即使返回0结帐仍显示税金.

I made few modifications for work the condition and return 0,even it return 0 checkout still shows tax.

这是我的代码存档

/app/code/core/Mage/Tax/Model/Calculation.php line number 268



    public function getRate($request)
        {
            if (!$request->getCountryId() || !$request->getCustomerClassId() || !$request->getProductClassId()) {
                return 0;
            } 


           //my code
            $ctax= Mage::getSingleton('checkout/session')->getQuote()->getCustomerTaxvat();


            if ($this->getCustomer() && $ctax !='') {
                //echo 'test';
                return 0;          
            }
        //end my code   


            $cacheKey = $this->_getRequestCacheKey($request);
            if (!isset($this->_rateCache[$cacheKey])) {
                $this->unsRateValue();
                $this->unsCalculationProcess();
                $this->unsEventModuleId();
                Mage::dispatchEvent('tax_rate_data_fetch', array(
                    'request' => $request));
                if (!$this->hasRateValue()) {
                    $rateInfo = $this->_getResource()->getRateInfo($request);
                    $this->setCalculationProcess($rateInfo['process']);
                    $this->setRateValue($rateInfo['value']);
                } else {
                    $this->setCalculationProcess($this->_formCalculationProcess());
                }
                $this->_rateCache[$cacheKey] = $this->getRateValue();
                $this->_rateCalculationProcess[$cacheKey] = $this->getCalculationProcess();
            }
            return $this->_rateCache[$cacheKey];
        }

当用户在结帐时输入增值税号时，任何人都可以帮助我将税款设为0，非常感谢

Anyone can help me to make tax 0 when user enters vat number on checkout, Thanks a lot

推荐答案

我已经设法通过遵循以下线程来解决我的问题:

I've managed to solve my problem by following this thread : Modify tax rate on cart quote items and recalculate

我已将观察者添加到事件sales_quote_collect_totals_before.

I have added an Observer to the event sales_quote_collect_totals_before.

这是我的观察者的内容，非常简单:

And here is the content of my observer, very simple :

    public function removetax($observer)
    {
        $customer_id = Mage::getSingleton('customer/session')->getId();
        $customer = Mage::getModel("customer/customer")->load($customer_id);

        if($customer->getIsTaxExempt() == 1)
        {
            $items = $observer->getEvent()->getQuote()->getAllVisibleItems();
            foreach($items as $item)
                $item->getProduct()->setTaxClassId(0);
        }
    }

如果客户免税，则获取当前的购物车内容，并将每个商品的产品税类设置为0.不保存商品或商品是强制性的.此处的目的是为以下计算设置一个值，而不是将其保存在数据库中.税种需要保持在数据库中的初始值.

If customer is tax exempt, I grab the current cart content and for each item, I set the product tax class to 0. It is mandatory to not save the product or the item. The aim here is to set a value for the following calculation, not to save it in the database. Tax classes need to stay to the initial value in the db.

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