Creating a model mixin with URL-related methods

For every model that has its own distinct detail page, it is good practice to define the get_absolute_url() method. This method can be used in templates and also in the Django admin site to preview the saved object. However, get_absolute_url() is ambiguous, as it returns the URL path instead of the full URL.

In this recipe, we will look at how to create a model mixin that provides simplified support for model-specific URLs. This mixin will enable you to do the following:

• Allow you to define either the URL path or the full URL in your model
• Generate the other URL automatically, based on the one that you defined
• Define the get_absolute_url() method behind the scenes