3. How to add custom product pricing module

In this tutorial you will learn how to your own custom product pricing module.

3.1. Create an application

First you need to create a default Django application (or use an existing one).

If you do not know how to do this, please refer to the excellent Django tutorial.

3.2. Implement the PriceCalculator class

Within __init__.py file of your application (or anywhere you choose) create a class that inherits from lfs.price.PricingCalculator and implement all inherited methods.

from lfs.price import PriceCalculator

class CustomPriceCalculator(PriceCalculator):

    def get_price(self, with_properties=True):
        return self.get_price_net()

    ... Other Methods...

3.3. Plug in the custom price calculator

• Add your application to the PYTHONPATH.
• Add the application to settings.INSTALLED_APPS.
• If your are using models (which is completely up to you), sync your database.

Add your custom price calculator to lfs.core.settings.LFS_PRICE_CALCULATOR_DICTIONARY

Edit the dictionary lfs.core.settings.LFS_PRICE_CALCULATOR_DICTIONARY to make your custom pricing calculator available to products in the manage interface

LFS_PRICE_CALCULATOR_DICTIONARY = {
    'lfs.gross_price.GrossPriceCalculator': 'Price including tax',
    'lfs.net_price.NetPriceCalculator': 'Price excluding tax',
    'mycustom_price.CustomPriceCalculator': 'My Pricing Calculator',
}

3.4. Set shop default price calculator in manage interface

• Browse to http://yourshopdomain/manage and login.
• Select Shop - Preferences
• Select Default Values and go the Price Calculator section.
• Select your new pricing calculator from the drop down menu of choices.
• Save the default values.

All products with an unset price calculator will default to using the shop price calculator.

3.5. Set product pricing calculator in manage interface

• Browse to http://yourshopdomain/manage and login.
• Select Catalog - Product
• Select the product whose price calculator you wish to change.
• Select the Data Tab (this is the first tab) and scroll to the Prices section.
• Select your new pricing calculator from the drop down menu of choices.
• Save the product.
• Browse to your product in your shop and you should see the new price as calculated by your custom pricing calculator.