Serializing objects
Creating an API starts with creating a serializer class and then creating a view, in particular a ModelViewSet view class. Serializing objects means converting a model object into JSON format to represent the data of that object. The last thing we need to do is create URL patterns that map to the view classes that we wrote; this will be done using URL routers. These URL patterns are considered your API endpoints.
One thing to note in this section is that we need to create serializers for all models that relate to other models when using related fields. This is why the following exercises will show examples for all four models of the chapter_3 app. This has to be done in order to ensure that we do not get errors when using the Browsable API, which we will introduce later in this chapter, and when performing API requests. This means if you have multiple Seller that have been assigned a Group or Permission, that Group and/or Permission object will also have to be...
