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<?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="org.example.mapper.CourseMapper">
<resultMap type="Course" id="CourseResult">
<result property="id" column="id" />
<result property="name" column="name" />
<result property="courseNo" column="course_no" />
<result property="teacherId" column="teacher_id" />
<result property="remark" column="remark" />
<association property="teacher" column="teacher_id" select="org.example.mapper.UserMapper.selectUserById"/>
</resultMap>
<sql id="selectCourseVo">
select id, name, course_no, teacher_id, remark from course
</sql>
<select id="selectCourseList" parameterType="Course" resultMap="CourseResult">
<include refid="selectCourseVo"/>
<where>
<if test="name != null and name != ''"> and name like concat('%', #{name}, '%')</if>
<if test="teacherId != null and teacherId != ''"> and teacher_id = #{teacherId}</if>
</where>
order by id desc
</select>
<select id="selectCourseById" parameterType="Long" resultMap="CourseResult">
<include refid="selectCourseVo"/>
where id = #{id}
</select>
<insert id="insertCourse" parameterType="Course" useGeneratedKeys="true" keyProperty="id">
insert into course
<trim prefix="(" suffix=")" suffixOverrides=",">
<if test="name != null and name != ''">name,</if>
<if test="courseNo != null and courseNo != ''">course_no,</if>
<if test="teacherId != null and teacherId != ''">teacher_id,</if>
<if test="remark != null">remark,</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides=",">
<if test="name != null and name != ''">#{name},</if>
<if test="courseNo != null and courseNo != ''">#{courseNo},</if>
<if test="teacherId != null and teacherId != ''">#{teacherId},</if>
<if test="remark != null">#{remark},</if>
</trim>
</insert>
<update id="updateCourse" parameterType="Course">
update course
<trim prefix="SET" suffixOverrides=",">
<if test="name != null and name != ''">name = #{name},</if>
<if test="courseNo != null and courseNo != ''">course_no = #{courseNo},</if>
<if test="teacherId != null and teacherId != ''">teacher_id = #{teacherId},</if>
<if test="remark != null">remark = #{remark},</if>
</trim>
where id = #{id}
</update>
<delete id="deleteCourseById" parameterType="Long">
delete from Course where id = #{id}
</delete>
<delete id="deleteCourseByIds" parameterType="String">
delete from Course where id in
<foreach item="id" collection="array" open="(" separator="," close=")">
#{id}
</foreach>
</delete>
</mapper>