在django序列化器中是否存在自动验证primaryKey (author_slug或phrase_slug)的方法?

Question

我有模型，序列化和视图的crud。

# models.py
from django.db import models

class Author(models.Model):
slug = models.SlugField(primary_key=True)
name = models.CharField(max_length=200)
description = models.TextField()
class Meta:
db_table = 'authors'

class Phrase(models.Model):
author_slug = models.ForeignKey(Author, db_column='author_slug', on_delete=models.DO_NOTHING)
text = models.TextField()
class Meta:
db_table = 'phrases'

# serializers.py
from rest_framework import serializers
from .models import Author, Phrase

class AuthorSerializer(serializers.ModelSerializer):
class Meta:
model = Author
fields = ('slug', 'name', 'description')

class PhraseSerializer(serializers.ModelSerializer):
author = AuthorSerializer(source='author_slug', read_only=True,)
class Meta:
model = Phrase
fields = ('id', 'text', 'author_slug', 'author')
# views.py
from rest_framework import viewsets
from .models import Author, Phrase
from .serializers import AuthorSerializer, PhraseSerializer

class AuthorViewSet(viewsets.ModelViewSet):
serializer_class = AuthorSerializer
queryset = Author.objects.all()

class PhraseViewSet(viewsets.ModelViewSet):
serializer_class = PhraseSerializer
queryset = Phrase.objects.all()

现在我需要做一个新的指定端点GET/exist-relationship-bwt-author-phrase当这个主体:

{
"author_slug": "an-author",
"phrase_slug": "a-phrase"
}

在django序列化器中是否存在自动验证primaryKey (author_slug或phrase_slug)的方法?

Answer 1

是，用下面的格式创建一个新的序列化器:

class CheckRelationshipAuthorPhraseSerializer(serializers.Serializer):
author_slug = serializers.PrimaryKeyRelatedField(queryset=Author.objects.all())
phrase_slug = serializers.PrimaryKeyRelatedField(queryset=Phrase.objects.all())

在你的视图上使用:

class CheckRelationshipAuthorPhraseView(views.APIView):
def post(self, request, *args, **kwargs):
# Validate automatic entry data
serializer = CheckRelationshipAuthorPhraseSerializer(data=request.data)
serializer.is_valid(raise_exception=True)
# Check relationship between author and phrase