fix

sop-business/src/main/java/com/qmth/sop/business/entity/SysDevice.java

@@ -42,7 +42,7 @@ public class SysDevice extends BaseEntity implements Serializable {
     private String model;
 
     @ApiModelProperty(value = "购买时间")
-    @NotNull(message = "购买时间不能为空")
+//    @NotNull(message = "购买时间不能为空")
     private Long buyTime;
 
     @ApiModelProperty(value = "供应商id")