<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
  PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.railway.system.mapper.SysUserPostMapper">

  <resultMap type="SysUserPost" id="SysUserPostResult">
    <result property="userId" column="user_id"/>
    <result property="postId" column="post_id"/>
  </resultMap>

  <delete id="deleteUserPostByUserId" parameterType="Long">
    delete from sys_user_post where user_id=#{userId}
  </delete>

  <select id="countUserPostById" resultType="Integer">
    select count(1) from sys_user_post where post_id=#{postId}
  </select>

  <delete id="deleteUserPost" parameterType="Long">
    delete from sys_user_post where user_id in
    <foreach collection="array" item="userId" open="(" separator="," close=")">
      #{userId}
    </foreach>
  </delete>

  <insert id="batchUserPost">
    insert into sys_user_post(user_id, post_id) values
    <foreach item="item" index="index" collection="list" separator=",">
      (#{item.userId},#{item.postId})
    </foreach>
  </insert>

</mapper> 