How to configure shipping¶
Shipping can be very complicated. Depending on the domain, a wide variety of shipping scenarios are found in the wild. For instance, calculation of shipping costs can depend on:
- Shipping method (e.g., standard, courier)
- Shipping address
- Time of day of order (e.g., if requesting next-day delivery)
- Weight of items in basket
- Customer type (e.g., business accounts get discounted shipping rates)
- Offers and vouchers that give free or discounted shipping
Further complications can arise such as:
- Only making certain shipping methods available to certain customers
- Tax is only applicable in certain situations
Oscar can handle all of these shipping scenarios.
Shipping in Oscar¶
Configuring shipping charges requires overriding Oscar’s core ‘shipping’ app
and providing your own
Repository class (see Customising Oscar) that
returns your chosen shipping method instances.
The primary responsibility of the
Repository class is to provide the available shipping methods for a
particular scenario. This is done via the
which returns the shipping methods available to the customer.
This method is called in several places:
- To look up a “default” shipping method so that sample shipping charges can be shown on the basket detail page.
- To list the available shipping methods on the checkout shipping method page.
- To check the selected shipping method is still available when an order is submitted.
get_shipping_methods method takes the basket, user, shipping address
and request as parameters. These can be used to provide different sets of
shipping methods depending on the circumstances. For instance, you could use
the shipping address to provide international shipping rates if the address is
get_default_shipping_method method takes the same parameters and
returns default shipping method for the current basket. Used for shipping
cost indication on the basket page. Defaults to free shipping method.
Oscar’s checkout process includes a page for choosing your shipping method. If there is only one method available for your basket (as is the default) then it will be chosen automatically and the user immediately redirected to the next step.
If the available shipping methods are the same for all customers and shipping
addresses, then override the
methods property of the repository:
from oscar.apps.shipping import repository from . import methods class Repository(repository.Repository): methods = (methods.Standard(), methods.Express())
For more complex logic, override the
from oscar.apps.shipping import repository from . import methods class Repository(repository.Repository): def get_available_shipping_methods( self, basket, user=None, shipping_addr=None, request=None, **kwargs): methods = (methods.Standard()) if shipping_addr and shipping_addr.country.code == 'GB': # Express is only available in the UK methods = (methods.Standard(), methods.Express()) return methods
Note that the
get_shipping_methods method wraps
get_available_shipping_methods in order to handle baskets that don’t
require shipping and to apply shipping discounts.
Shipping methods need to implement a certain API. They need to have the following properties which define the metadata about the shipping method:
code- This is used as an identifier for the shipping method and so should be unique amongst the shipping methods available in your shop.
name- The name of the shipping method. This will be visible to the customer during checkout.
description- An optional description of the shipping method. This can contain HTML.
Further, each method must implement a
calculate method which accepts the
basket instance as a parameter and returns a
Price instance. Most shipping
Base, which stubs this API.
Here’s an example:
from oscar.apps.shipping import methods from oscar.core import prices class Standard(methods.Base): code = 'standard' name = 'Standard shipping (free)' def calculate(self, basket): return prices.Price( currency=basket.currency, excl_tax=D('0.00'), incl_tax=D('0.00'))
Core shipping methods¶
Oscar ships with several re-usable shipping methods which can be used as-is, or subclassed and customised:
from oscar.apps.shipping import methods from oscar.core import prices class Standard(methods.FixedPrice): code = 'standard' name = 'Standard shipping' charge_excl_tax = D('5.00') class Express(methods.FixedPrice): code = 'express' name = 'Express shipping' charge_excl_tax = D('10.00')
There is also a weight-based shipping method,
which determines a shipping charge by calculating the weight of a basket’s
contents and looking this up in a model-based set of weight bands.