It provides a Serializer class which gives you a powerful, generic way to control the output of your responses, as well as a ModelSerializer class which provides a useful shortcut for creating serializers that deal with model instances and querysets. In Part 3: Adding custom endpoints, I tell you how to add your own custom endpoints to your viewset without having to write a whole new view or add anything new to your urls.py. REST frameworks serializers work very similarly to Djangos Form and ModelForm classes. Django Rest Framework serializers can also save the information into the. In Part 1: ModelViewSet attributes and methods, I covered the attributes and methods that ship with ModelViewSet, what they do, and why you need to know about them. Serializers can also be used to deserialize json back to the python models. You can use any of these convenience view classes to create the set of API endpoints you need for your project, or use the GenericAPIView class plus the mixins you need to create your own. RetrieveAPIView = GenericAPIView + RetrieveModelMixin.UpdateAPIView = GenericAPIView + UpdateModelMixin.DestroyAPIView = GenericAPIView + DestroyModelMixin.ListAPIView = GenericAPIView + ListModelMixin.CreateAPIView = GenericAPIView + CreateModelMixin.You can see them on the ClassyDRF website under the Generics heading. To do everything but delete, your viewset would look like this: from rest_framework.generics import GenericAPIViewįrom rest_framework.mixins import CreateModelMixin, RetrieveModelMixin,īut DRF is smart! It knows that you might want to use only a few endpoints at a time, so DRF includes several convenience classes for you with different combinations of the GenericAPIView and the action mixins. In that case, you can create your own ModelViewSet using only the mixins that give you the endpoints you want. For this, I want to use my BookListSerializer.īut when I hit GET /books//īut what if you don't need all those endpoints? Maybe you want your API to include the ability to perform all these actions except deleting books. Maybe I want the cover image, the title, the author, and whether there are books available. When I hit GET /books/ (so I'm seeing a list of books), I only want some of the book data. We could define a custom field that could be used to serialize tagged instances, using the type of each instance to determine how it should be serialized: class TaggedObjectRelatedField(serializers.RelatedField): ''' A custom field to use for the taggedobject generic relationship. How do I return different serializers for list and detail endpoints? So let's go through a few cases where we might want to customize the behavior of our endpoints and walk through how we would do that. In Part 1, we were writing a BookViewSet. class TopicSerializer (serializers.ModelSerializer): votecount serializers.IntegerField (readonlyTrue) class Meta: model Topic. So technically your current serializer could just be. You can pull out the method that contains what you want to change, override it with your own custom behavior, and put it back in. Also, you can pass a method name as the source of a Django REST framework field and it will automatically call it. We stepped through that code because if you know what the main methods of the ModelViewSet do and how they work, you know where to go when you want to tweak the behavior of your viewset. In order to make it writable it has a create. It inherits Serializer as opposed to ModelSerializer and describes the fields. If you came here from Part 1 of What You Should Know About Django REST Framework, you may be wondering why I just walked you through a bunch of source code. Serializer A model-less serializer is pretty straight forward. Here are the slides and the video if you want to see them. serializerclass - The serializer class that should be used for validating and deserializing input, and for serializing output. I gave this talk at P圜ascades 2021 and decided to turn it into a series of blog posts so it's available to folks who didn't attend the conference or don't like to watch videos. Read Part 1: ModelViewSet attributes and methods and Part 3: Adding custom endpoints. Old_password = request.This is Part 2 of a 3-part series on Django REST Framework viewsets. Serializers.py class PasswordSerializer(Serializer): I am trying to set up a custom login serializer in Django and want a custom response but the default one always show: ,
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