feat:额外收费

lib/common/models/database/database_enum_models.dart

@@ -183,3 +183,16 @@ enum ProductNature implements BaseEnum {
 
   const ProductNature(this.code, this.title);
 }
+
+/// 优惠类型
+enum DiscountsType implements BaseEnum {
+  JZ_DISCOUNT("1", "9折优惠"),
+  ;
+
+  @override
+  final String code;
+  @override
+  final String title;
+
+  const DiscountsType(this.code, this.title);
+}