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models.py
# 商品分类
class Category(models.Model):
name = models.CharField(max_length=32)
# 商品
class Goods(models.Model):
name = models.CharField(max_length=32)
price = models.DecimalField(max_digits=9,decimal_places=2)
cate = models.ForeignKey(to='Category',on_delete=models.CASCADE)
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urls.py
from django.urls import path,include
from . import views
urlpatterns = [
path('goods/',views.GoodsView.as_view()),
]
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seralizers.py
# 序列化
class GoodsSerializer(serializers.ModelSerializer):
# 如果想查出分类名称 CharField(source='<本model中的外键>.<外键指向的model的相应属性>')
cate_name = serializers.CharField(source='cate.name')
class Meta:
model=Goods
fields = ('cate_name','name','price')
# 反序列化
class GoodsUnSerializer(serializers.Serializer):
name = serializers.CharField(max_length=32)
price = serializers.DecimalField(max_digits=9,decimal_places=2)
cate = serializers.IntegerField()
# 添加
def create(self, data):
return Goods.objects.create(
cate_id = data.pop('cate'),
**data
)
# 编辑
def update(self,instance,data):
return instance.update(
cate_id = data.pop('cate'),
**data
)
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views.py
class GoodsView(APIView):
# 查询
def get(self,request):
goods = models.Goods.objects.all()
gs = GoodsSerializer(goods,many=True)
return Response(gs.data)
# 添加
def post(self,request):
dic = {"name":"金丝猴","price":132,'cate':3}
gs = GoodsUnSerializer(data=dic)
if gs.is_valid():
gs.save()
return HttpResponse('ok')
return HttpResponse('error')
# 更新
def put(self,request):
obj = models.Goods.objects.filter(id=1)
dic = {"name":"金丝猴123","price":234,'cate':2}
gs = GoodsUnSerializer(obj,data=dic)
if gs.is_valid():
gs.save()
return HttpResponse('put-ok')
return HttpResponse('put-error')
