SignInRecordMapper.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.subsidy.mapper.SignInRecordMapper">

    <!-- 通用查询映射结果 -->
    <resultMap id="BaseResultMap" type="com.subsidy.model.SignInRecordDO">
        <id column="id" property="id" />
        <result column="create_date" property="createDate" />
        <result column="update_date" property="updateDate" />
        <result column="delete_date" property="deleteDate" />
        <result column="student_id" property="studentId" />
        <result column="class_id" property="classId" />
        <result column="sign_in_date" property="signInDate" />
    </resultMap>

    <!-- 通用查询结果列 -->
    <sql id="Base_Column_List">
        create_date,
        update_date,
        delete_date,
        id, student_id, class_id, sign_in_date
    </sql>

    <select id="classSignInfo" resultType="com.subsidy.vo.sign.ClassSignInfoVO">
        SELECT
            t.id as classId,
            t2.id as courseId,
            t.class_name,
            t2.course_name,
            t.start_date,
            t.end_date
        FROM
            class_dict t
            LEFT JOIN course_dict t2 ON t.course_id = t2.id
        WHERE
            t.delete_date IS NULL
            AND t2.delete_date IS NULL
            and t.id = #{id}
            <if test="courseName != null and courseName !=''">
                AND t.course_name like concat('%',#{courseName} ,'%')
            </if>
            <if test="className != null and className !=''">
                and t.class_name like concat('%',#{className} ,'%')
            </if>
    </select>

</mapper>