修复商品创建异常

api/product.py

@@ -163,7 +163,7 @@ class ProductCreateView(APIView):
         effect_ids = json.loads(request.POST.get('effect_ids', '[]'))
         is_online = request.POST.get('is_online')
         brand_id = request.POST.get('brand_id')
-        period_of_use = request.POST.get('period_of_use')
+        period_of_use = request.POST.get('period_of_use') or 0
 
         if not cn_name or not image:
             return r'缺少参数'