mybatisPlus更新字段值为null的解决方案

package com.baomidou.mybatisplus.annotation;

import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.mapping.ResultMapping;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.TypeHandler;
import org.apache.ibatis.type.UnknownTypeHandler;

import java.lang.annotation.*;


@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD, ElementType.ANNOTATION_TYPE})
public @interface TableField {

    
    String value() default "";

    
    boolean exist() default true;

    
    String condition() default "";

    
    String update() default "";

    
    FieldStrategy insertStrategy() default FieldStrategy.DEFAULT;

    
    FieldStrategy updateStrategy() default FieldStrategy.DEFAULT;

    
    FieldStrategy whereStrategy() default FieldStrategy.DEFAULT;

    
    FieldFill fill() default FieldFill.DEFAULT;

    
    boolean select() default true;

    
    boolean keepGlobalFORMat() default false;

    
    JdbcType jdbcType() default JdbcType.UNDEFINED;

    
    Class<? extends TypeHandler> typeHandler() default UnknownTypeHandler.class;

    
    boolean javaType() default false;

    
    String numericScale() default "";
}

package com.baomidou.mybatisplus.annotation;


public enum FieldStrategy {
    
    IGNORED,
    
    NOT_NULL,
    
    NOT_EMPTY,
    
    DEFAULT,
    
    NEVER
}

userService.lambdaUpdate()
            .eq(User::getId, user.getId())
            .set(User::getUserName, user.getUserName())
            .set(User::getNickName, null)
            .update();

mybatis-plus:
  global-config:
      # 字段策略 0：忽略判断，直接拼sql, 1:非NULL, 2：非空，3：默认；4：永远不加入SQL
    field-strategy: 0

@apiModelProperty(value = "所在党组织")
    @TableField(updateStrategy = FieldStrategy.IGNORED)
    private Long partyOrgId;

staffInfo.setPartyOrgId(null)