FollowMapper.xml

<?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.army.ardiary.repository.FollowRepository">
    <insert id="insert"
            parameterType="FollowEntity"
            useGeneratedKeys="true"
            keyProperty="followId"
            keyColumn="follow_id">
        INSERT INTO follow (follower, followee)
        VALUES (#{follower}, #{followee});
    </insert>

    <select id="selectById"
            resultType="FollowEntity">
        SELECT follow_id, follower, followee
        FROM follow
        WHERE follow_id = #{followId}
    </select>

    <update id="update"
            parameterType="FollowEntity"
            useGeneratedKeys="true"
            keyProperty="followId"
            keyColumn="follow_id">
        UPDATE follow
        SET follower = #{follower},
        followee = #{followee}
        WHERE follow_id = #{followId};
    </update>

    <delete id="delete"
            parameterType="int">
        DELETE
        FROM follow
        WHERE follow_id = #{followId}
    </delete>

    <select id="selectByFollower" resultType="FollowEntity">
        SELECT follow_id, follower, followee
        FROM follow
        WHERE follower = #{follower}
    </select>

    <select id="selectByFollowee" resultType="FollowEntity">
        SELECT follow_id, follower, followee
        FROM follow
        WHERE followee = #{followee}
    </select>
</mapper>