django drf 反序列化上传图片

Posted 2021-03-12 u-damowang1

• settings.py

#上传图片的类型
ALLOWED_IMG_TYPE = [‘jpg‘,‘png‘,‘PNG‘]

#上传图片的地址
UPLOAD_ADDRESS = ‘static/upload/‘

STATIC_URL = ‘/static/‘
#配置静态文件夹


STATICFILES_DIRS = [
    os.path.join(BASE_DIR,‘static‘),
]

• urls.py    (二级路由)　　

from django.urls import path
from . import views
#二级路由
urlpatterns = [
  path(‘goods/‘, views.GoodsView.as_view()),
]

• serializers.py

#商品的反序列化
class GoodUnSerializer(serializers.Serializer):
    #商品名称约束
    name = serializers.CharField(max_length=32)
    #商品价格约束
    price = serializers.DecimalField(max_digits=9,decimal_places=2)
    #商品分类约束
    cate_id = serializers.IntegerField()
    #商品图片约束
    img = serializers.CharField(max_length=255)
    def create(self, validated_data):
        #将获取的字典类型打散
        return models.Goods.objects.create(**validated_data)

• views.py  (字段name,price等可以写约束条件，这里就简单的给图片做一个约束)

#商品
class GoodsView(APIView):
   
    def post(self, request):
        name = request.POST.get(‘name‘, ‘‘).strip()
        price = request.POST.get(‘price‘, 0)
        cate_id = request.POST.get(‘cate_id‘)
        data = {
            ‘name‘:name,
            ‘price‘:price,
            ‘cate_id‘:cate_id
        }
        img = request.FILES.get(‘img‘)
        if img:
            #获取后缀名
            ext = img.name.split(‘.‘)[-1]
            #如果上传图片的后缀名不在配置的后缀名里返回格式不允许
            if ext not in settings.ALLOWED_IMG_TYPE:
                return Response({
                    "status":205,
                    "msg":"格式不允许",
                    "data":‘‘
                })
            # path = ‘‘
            #新的文件名
            newfielname = datetime.now().strftime(‘%Y%m%d%H%M%S‘) + str(random.randint(10000,99999)) + ‘.‘ + ext  #采用时间和随机数
            path = settings.UPLOAD_ADDRESS + newfielname
            with open(path,‘wb‘) as f:  #二进制写入
                for i in img.chunks():
                    f.write(i)
            data[‘img‘] = newfielname
            #入库反序列化添加
            obj = GoodUnSerializer(data=data)
            if obj.is_valid():
                obj.save()
                print(obj.errors)
                return Response({
                    ‘status‘:200,
                    ‘msg‘:‘添加成功‘,
                    ‘data‘:‘‘

                })

            return Response({
                ‘status‘:201,
                ‘msg‘:‘添加失败‘,
                ‘data‘:‘‘
            })

• 测试
  • 　　不成功的
  

　　由于之前限制图片的后缀名，所以jfif格式上传不成功

• • 来一个格式允许的吧