MybatisPlus+Postgresql整合的几个坑及解决

spring:
  datasource:
    platform: postgres
    url: jdbc:postgresql://192.188.1.245:5432/uum?currentSchema=uum
    schemaName: uum
    username: xxxx
    password: xxxx
    driver-class-name: org.postgresql.Driver

create sequence uum.userid_seq start with 1 increment by 1 no minvalue no maxvalue cache 1;
alter sequence uum.userid_seq owner to smartsys;
 
alter table uum.user alter column id set default nextval('uum.userid_seq');

<insert id="insertUser" useGeneratedKeys="true" keyProperty="id" keyColumn="id" parameterType="com.sifang.uum.model.Cuser">
    insert into cuser(uname, realname, password, phone, email, user_type, deleted, birthday) values(#{uname}, #{realname}, #{password}, #{phone}, #{email}, #{userType}, #{deleted}, #{birthday})
</insert>

baseMapper.insertUser(user);
int id= user.getId();

private List<CompanyVo> children;

public List<CompanyVo> companyTree() {
    // 调用mybatisplus的默认函数获取所有单位
    List<Company> list = this.list(); 
 
    // 获取所有最顶层的单位
    List<CompanyVo> parentList = getParentList(list);
 
    // 递归调用填充子单位
    List<CompanyVo> allList = getChildrenList(list, parentList);
 
    return allList;
}
 
private List<CompanyVo> getParentList(List<Company> list) {
    List<CompanyVo> parentList = new ArrayList<>();
 
    list.forEach(comp ->{
        if(comp.getPcid() == null) {
            parentList.add(new CompanyVo((comp)));
        }
    });
 
    return parentList;
}
 
private List<CompanyVo> getChildrenList(List<Company> list, List<CompanyVo> parentList) {
    parentList.forEach(parent -> {
        List<CompanyVo> childrenList = new ArrayList<CompanyVo>();
        list.forEach(comp -> {
            if(parent.getCid() == comp.getPcid()) {
                childrenList.add(new CompanyVo(comp));
            }
        });
 
        parent.setChildren(getChildrenList(list, childrenList));
    });
 
    return parentList;
}

public Page<Cuser> listAllUser(Page<Cuser> page, int cid) {
    // 获取编号为cid的单位的所有子单位的列表
    List<Integer> allChile = baseMapper.listAllChildComp(cid);
 
    if(allChile.size() > 0) {
        String str = "'";
        for(int i=0; i<allChile.size(); i++) {
            str += allChile.get(i).toString();
 
            if(i != allChile.size() - 1) {
                str += ",";
            }
        }
        str += "'";
 
        System.out.println(str);
 
        // 获取所有这些单位的人员列表
        return baseMapper.listAllChildUser(page, str);
    }
    else {
        return null;
    }
}

<select id="listAllChildComp" parameterType="java.lang.Integer" resultType="java.lang.Integer">
    WITH RECURSIVE T ( cid, pcid ) AS (
        SELECT
            A.cid,
            A.pcid
        FROM
            company A
        WHERE
            A.cid = #{cid} UNION ALL
        SELECT
            b.cid,
            b.pcid
        FROM
            company b,
            T
        WHERE
            b.pcid = T.cid
    ) SELECT cid FROM T
</select>
 
<select id="listAllChildUser" resultType="com.sifang.uum.model.Cuser">
    select cuser.id id, cuser.uname uname
    from cuser
        left join rel_comp_user on cuser.id=rel_comp_user.uid
    where position(','||rel_comp_user.cid||',' in ','||${childComp}||',')>0
</select>