@ApiModelProperty(value ="证件照片url")
@TableField(value = "id_photo_url",fill = FieldFill.UPDATE)
private String idPhotoUrl;
方法一
@Data @EqualsAndHashCode(callSuper = false) @Accessors(chain = true) @TableName("base_party_member") @ApiModel(value="BasePartyMember对象", description="党员管理表") public class BasePartyMember extends Model<BasePartyMember> {private static final long serialVersionUID=1L;@ApiModelProperty(value = "党员id")@TableId(value = "id", type = IdType.AUTO)private Long id;@ApiModelProperty(value = "服务范围 可关联多个房屋")@TableField(fill = FieldFill.UPDATE)//@TableField(value = "service_area_ids",fill = FieldFill.UPDATE)//@TableField(value = "service_area_ids", updateStrategy = FieldStrategy.IGNORED,jdbcType = VARCHAR )private String serviceAreaIds;@ApiModelProperty(value = "是否删除,Y-删除,N-未删除")@TableField("is_deleted")private String isDeleted;@ApiModelProperty(value = "创建时间")@TableField("create_time")private Date createTime;@ApiModelProperty(value = "创建人")@TableField("creator")private Long creator;@ApiModelProperty(value = "最后修改人")@TableField("operator")private Long operator;@ApiModelProperty(value = "最后修改时间")@TableField("update_time")private Date updateTime;@Overrideprotected Serializable pkVal() {return this.id;}}
count = basePartyMemberMapper.updateById(newPartyMember); if(StringUtils.isBlank(newPartyMember.getServiceAreaIds())){//也可以参考下面这种写法basePartyMemberMapper.update(null,Wrappers.<BasePartyMember>lambdaUpdate().eq(BasePartyMember::getId,newPartyMember.getId()).set(BasePartyMember::getServiceAreaIds, "")); }
2021-05-08 11:04:22.576 ERROR 1 [http-nio-18093-exec-3] c.w.s.c.c.ExceptionHandleConfiguration : [500]_
### Error updating database. Cause: java.sql.SQLIntegrityConstraintViolationException: Column 'service_area_ids' cannot be null
### The error may exist in com/wochanye/ssc/party/mapper/BasePartyMemberMapper.java (best guess)
### The error may involve com.wochanye.ssc.party.mapper.BasePartyMemberMapper.update-Inline
### The error occurred while setting parameters
### SQL: UPDATE base_party_member SET service_area_ids=? WHERE (id = ?)
### Cause: java.sql.SQLIntegrityConstraintViolationException: Column 'service_area_ids' cannot be null
; Column 'service_area_ids' cannot be null; nested exception is java.sql.SQLIntegrityConstraintViolationException: Column 'service_area_ids' cannot be null
org.springframework.dao.DataIntegrityViolationException:
### Error updating database. Cause: java.sql.SQLIntegrityConstraintViolationException: Column 'service_area_ids' cannot be null
### The error may exist in com/wochanye/ssc/party/mapper/BasePartyMemberMapper.java (best guess)
### The error may involve com.wochanye.ssc.party.mapper.BasePartyMemberMapper.update-Inline
### The error occurred while setting parameters
### SQL: UPDATE base_party_member SET service_area_ids=? WHERE (id = ?)
### Cause: java.sql.SQLIntegrityConstraintViolationException: Column 'service_area_ids' cannot be null
; Column 'service_area_ids' cannot be null; nested exception is java.sql.SQLIntegrityConstraintViolationException: Column 'service_area_ids' cannot be null
at org.springframework.jdbc.support.SQLExceptionSubclassTranslator.doTranslate(SQLExceptionSubclassTranslator.java:87)
方法二
https://blog.csdn.net/qianlingo/article/details/105120219
@Data
@TableName("shop_item")
public class ShopItem implements Serializable {
private static final long serialVersionUID = 1L;
/**
* 编号
*/
@TableId(type= IdType.INPUT)
private String id;
/**
* 物品名称
*/
private String itemName;
/**
* 物品价格
*/
@TableField(fill = FieldFill.UPDATE)
private Double itemPrice;
/**
* 添加人编号
*/
private String addUserId;
/**
* 添加时间
*/
private Date addTime;
}
我们在itemPrice属性的顶上加上@TableField(fill = FieldFill.UPDATE)后,在执行一遍修改方法看看!
update
shop_item
set
item_name = 'iPhone 8 Plus',
item_price = ''
where
id = '361E8C48-6699-4ED5-83C4-7C9D98747C2C';
bingo,成功!
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版权声明:本文为CSDN博主「qianlingo」的原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/qianlingo/article/details/105120219
方法三
https://blog.csdn.net/l848168/article/details/92829930
field-strategy字段更新插入策略属性说明:
IGNORED(0): "忽略判断", 所有字段都更新和插入
NOT_NULL(1): "非 NULL 判断", 只更新和插入非NULL值
NOT_EMPTY(2): "非空判断", 只更新和插入非NULL值且非空字符串
DEFAULT:默认NOT_NULL
方法五
https://www.cnblogs.com/wuxixin/p/13573624.html
最近在工作的时候遇到使用mybatis-plus框架遇到一个无法更新空字符串和null的问题,看了很多博客文章,都没有解决掉,在此记录一下自己解决方式
xxxx.updateById(user)
一般都是调用 updateById()这个方法导致无法把null或者空字符串更新到数据库中的。
通过查看mybatis-plus官方的api文档也记录了对应的解决方法,一共有三种解决的方法
插入或更新的字段有 空字符串 或者 null
第一种方式,对自己的系统影响有点大,不是很适合,果断放弃了,没有使用
第二种方式,是实体类的需要传入null或者是空字符的属性中调整验证注解,但是只加 strategy = FieldStrategy.IGNORED 是不行的,会报错,是因为没有指定该字段的jdbcType的类型,加上就可以解决掉
1 @TableField(strategy = FieldStrategy.IGNORED,el = "relationAccId,jdbcType=VARCHAR") 2 private String relationAccId;
第三种方式,mybatis-plus的版本必须3.x以上才可以用,使用UpdateWrapper来更新
//updateAllColumnById(entity) // 全部字段更新: 3.0已经移除 mapper.update(new User().setName("mp").setAge(3),Wrappers.<User>lambdaUpdate().set(User::getEmail, null) //把email设置成null.eq(User::getId, 2) ); //也可以参考下面这种写法 mapper.update(null,Wrappers.<User>lambdaUpdate().set(User::getAge, 3).set(User::getName, "mp").set(User::getEmail, null) //把email设置成null.eq(User::getId, 2) );
还是官方API靠谱,遇到问题,可以先到官方网址查查API,可能是个不错的选择!