Django Rest Api - display the username for every user - django

Question

So I have a model called 'Task' and the task has 'UserProfile's working on them. These 'UserProfile' models are just normal Users but inside the App of the 'Task'.
This is the API I have right now:
"tasks": [
{
"id": 1,
"name": "Läs På Internet",
"description": "asdasdasdasa",
"created": "2019-06-08",
"deadline": "2019-06-19",
"state": "new",
"stickers": [
{
"id": 1,
"name": "Detta är en sticker",
"content": "Sillicon Valley",
"created": "2019-06-08",
"creator": {
"id": 1,
"user": 1
}
}
],
"checkmarks": [
{
"id": 1,
"name": "Googla",
"checked": false
}
],
"workers": [
{
"id": 1,
"user": 1
}
]
},
{
"id": 2,
"name": "Läs i böcker",
"description": "aaa",
"created": "2019-06-10",
"deadline": "2019-06-25",
"state": "done",
"stickers": [],
"checkmarks": [],
"workers": [
{
"id": 1,
"user": 1
}
]
}
],
As you can see every user now just has 'id' and 'user', which are both the ID. How do I get the username for every user and display them in the rest api?
# Users
class UserProfile(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
class Meta:
verbose_name_plural = 'All Users'
def __str__(self):
return self.user.username
#receiver(post_save, sender=User)
def create_user_data(sender, update_fields, created, instance, **kwargs):
if created:
user = instance
profile = UserProfile.objects.create(user=user)
#Tasks
class Task(models.Model):
name = models.CharField(max_length=200)
description = models.CharField(max_length=2000)
created = models.DateField(default=date.today)
deadline = models.DateField(default=date.today)
state = models.CharField(max_length=20, default='new')
stickers = models.ManyToManyField(Sticker, blank=True)
checkmarks = models.ManyToManyField(Checkmark, blank=True)
workers = models.ManyToManyField(UserProfile, blank=True, related_name='TaskWorkers')
class Meta:
verbose_name_plural = 'Tasks'
def __str__(self):
return "{name}".format(name=self.name)
serializers:
class UserProfileSerializer(serializers.ModelSerializer):
class Meta:
model = UserProfile
fields = ('id', 'user')
class TaskSerializer(serializers.ModelSerializer):
stickers = StickerSerializer(many=True, read_only=True)
checkmarks = CheckmarkSerializer(many=True, read_only=True)
workers = UserProfileSerializer(many=True, read_only=True)
class Meta:
model = Task
fields = ('id', 'name', 'description', 'created', 'deadline', 'state', 'stickers', 'checkmarks', 'workers')
views:
class TaskView(viewsets.ModelViewSet):
http_method_names = ['get', 'post', 'put', 'delete', 'patch']
queryset = Task.objects.all()
serializer_class = TaskSerializer
class UserTaskView(TaskView):
def get_queryset(self):
return Task.objects.filter(workers__user=self.request.user)
The User Views are for displaying only for the users that are assigned!

Answer 1

You can either update the user serializer inside your UserProfileSerializer with something like this (creating a serializer with the fields you want for the User):
class UserProfileSerializer(serializers.ModelSerializer):
user = UserSerializer()
class Meta:
model = UserProfile
fields = ('id', 'user')
or this (accessing user fields from within the UserProfileSerializer):
class UserProfileSerializer(serializers.ModelSerializer):
username = serializers.CharField(source='user.username')
class Meta:
model = UserProfile
fields = ('id', 'user', 'username')

Answer 2

As documented below in
https://www.django-rest-framework.org/api-guide/serializers/#writable-nested-representations
You can get the user profile details inside the tasks as:
class TaskSerializer(serializers.ModelSerializer):
......
user = UserSerializer()
class Meta:
model = Task
fields = (...., 'user',....., 'workers')
This will return all the fields in the the user model as part of the task nested json