我使用Django的REST框架,我卡在插入的外键数据到另一个表。请参考以下方案:
如下面的代码给出的,我想插入template
表中的数据,并使用单post请求插入外键关系到template_owners
表。
我试过几个解决方案,但毫无效果不如预期,帮助表示高度赞赏。
models.朋友:
from django.db import models
from datetime import datetime
from django.utils import timezone
# Template model starts here.
class Template(models.Model):
Yes = "Yes"
No = 'No'
STATUS = [
(Yes, "Yes"),
(No, "No"),
]
class Meta:
db_table = "template"
ordering = ("date",)
uuid = models.CharField(max_length=64, null=False, primary_key=True)
name = models.CharField(max_length=255, null=False)
hypervisor = models.CharField(max_length=32, null=False)
download_url = models.CharField(max_length=255, null=False)
description = models.CharField(max_length=255, null=True)
metadata = models.CharField(max_length=255, null=True)
user = models.CharField(max_length=64, null=True)
command = models.CharField(max_length=32, null=True)
size = models.FloatField(null=False, blank=True, default=0)
is_default = models.CharField(max_length=3, choices=STATUS, default=Yes)
date_modified = models.DateTimeField(default=timezone.now)
date = models.DateTimeField(default=timezone.now)
owners = models.CharField(max_length=255, null=True)
def __str__(self):
return "Template [ uuid : {} ]" . format(self.uuid)
# Template model ends here.
# Template Owners model starts here.
class TemplateOwners(models.Model):
class Meta:
db_table = "template_owners"
ordering = ("date",)
template_uuid = models.ForeignKey(Template, on_delete=models.CASCADE, db_column="template_uuid")
gid = models.IntegerField(null=False, default=1)
uid = models.IntegerField(null=False, default=1)
date = models.DateTimeField(default=timezone.now)
# def __init__(self):
# self.fields['name'].error_messages = {'required': 'Please let us know what to call you!'}
def __str__(self):
return "Template Owner [ template_uuid : {} ]" . format(self.template_uuid)
# Template Owners model ends here.
serialize认识.朋友:
from rest_framework import serializers
from template.models import Template, TemplateOwners
def trigger_validator(self, data):
if data["name"] == "":
raise serializers.ValidationError({"name": "Template name is required"})
return data
class TemplateOwnerSerializer(serializers.ModelSerializer):
class Meta:
model = TemplateOwners
fields = ("gid", "uid", "date", "template_uuid")
class TemplateSerializer(serializers.ModelSerializer):
owners = TemplateOwnerSerializer(many=True)
class Meta:
model = Template
fields = ("uuid", "name", "hypervisor", "download_url", "size", "date", "owners")
def create(self, validated_data):
owners_data = validated_data.pop('owners')
template = Template.objects.create(**validated_data)
for owner_data in owners_data:
TemplateOwners.objects.create(template=template, **owner_data)
return template
views.朋友:
from django.http import Http404
from rest_framework.response import Response
from rest_framework import status
from template.models import Template
from template.serializers import TemplateSerializer
from template.serializers import TemplateOwnerSerializer
from rest_framework.permissions import IsAuthenticated
from rest_framework import generics
class TemplateList(generics.ListCreateAPIView):
permission_classes = (IsAuthenticated,)
queryset = Template.objects.all()
serializer_class = TemplateSerializer
def get(self, request, fromat=None):
templates = Template.objects.all()
serialized = TemplateSerializer(templates, many=True)
return Response(serialized.data)
def post(self, request, fromat=None):
serializer = TemplateSerializer(data=request.data)
if serializer.is_valid():
serializer.save()
#tempowner = TemplateOwnerSerializer(data=request.data)
#if tempowner.is_valid():
#tempowner.save()
return Response(serializer.data, status=status.HTTP_201_CREATED)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
class TemplateModify(generics.RetrieveUpdateDestroyAPIView):
permission_classes = (IsAuthenticated,)
serializer_class = TemplateSerializer
def get_object(self, pk):
try:
return Template.objects.get(pk=pk)
except Template.DoesNotExist:
raise Http404
def get(self, request, pk, fromat=None):
template = self.get_object(pk)
serialized = TemplateSerializer(template)
return Response(serialized.data)
def put(self, request, pk, fromat=None):
template = self.get_object(pk)
serializer = TemplateSerializer(template, data=request.DATA)
if serializer.is_valid():
serializer.save()
return Response(serializer.data)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
def delete(self, request, pk, format=None):
template = self.get_object(pk)
template.delete()
return Response(status=status.HTTP_204_NO_CONTENT)
有相关的外键在Django的REST框架几个问题,但没有一个是关心数据的插入,他们主要集中在数据获取,所以请经过整个场景标记重复之前。
你有串行,并创造一些问题,所以相应的改动
class TemplateOwnerSerializer(serializers.ModelSerializer):
class Meta:
model = TemplateOwners
fields = ("gid", "uid", "date")
class TemplateSerializer(serializers.ModelSerializer):
owners_data = TemplateOwnerSerializer(many=True)
class Meta:
model = Template
fields = ("uuid", "name", "hypervisor", "download_url", "size", "date", "owners_data")
def create(self, validated_data):
owners_data = validated_data.pop('owners_data')
template = Template.objects.create(**validated_data)
for owner_data in owners_data:
TemplateOwners.objects.create(template_uuid=template, **owner_data)
return template