django class based CreateApiView author_id is not null? - django

Question

I have also authenticate it with token but when I create a new post error is alert IntegrityError at /api/create/ NOT NULL constraint failed: core_article.author_id how can I valid data with request user in serializer?
model.py
from django.contrib.auth.models import User
from django.db import models
class Article(models.Model):
title = models.CharField(max_length=255, help_text="Short title")
content = models.TextField(blank=True)
author = models.ForeignKey(User, on_delete=models.CASCADE)
status = models.BooleanField(default=True)
def __str__(self):
return self.title
serializer.py
from rest_framework import serializers
from django.contrib.auth.models import User
from core.models import Article
class NewsSerializer(serializers.ModelSerializer):
author = serializers.SlugRelatedField(
slug_field=User.USERNAME_FIELD, read_only=True, required=False)
class Meta:
model = Article
fields = [
'id',
'author',
'title',
'content',
'status',
]
views.py
class ArticleCreate(CreateAPIView):
queryset = Article.status_objects.all()
serializer_class = NewsSerializer
permission_classes = (permissions.IsAuthenticated, )

Answer 1

I don't know if this is what you're looking for, but you can pass the user as author object to your serializer and in your serializer use that author to create your Article object (Note: I assume that you have used correct authentication_class in your view and have access to user from your request object).
First you need to override the perform create of your view:
class ArticleCreate(CreateAPIView):
queryset = Article.status_objects.all()
serializer_class = NewsSerializer
permission_classes = (permissions.IsAuthenticated, )
def perform_create(self, serializer):
serializer.save(author=self.request.user)
Which will send an user instance to your serializer validated data. Then you should change your serializer to:
class NewsSerializer(serializers.ModelSerializer):
class Meta:
model = Article
fields = [
'id',
'title',
'content',
'status',
]
Note that the line author = serializers.SlugRelatedField(slug_field=User.USERNAME_FIELD, read_only=True, required=False) and author are removed from your serializer. But if you need to serialize the id of that author (read only purpose) you can change your serializer to:
class NewsSerializer(serializers.ModelSerializer):
class Meta:
model = Article
fields = [
'id',
'title',
'author',
'content',
'status',
]
read_only_fields = ('author',)

Answer 2

author = serializers.SlugRelatedField(
slug_field=User.USERNAME_FIELD, read_only=True,required=True)
Please change required=False to required=True . If you set True then don't add Null value. So you avoid this errror.