ExerciseDictMapper.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.ExerciseDictMapper">

    <!-- 通用查询映射结果 -->
    <resultMap id="BaseResultMap" type="com.subsidy.model.ExerciseDictDO">
        <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="exercise_type" property="exerciseType" />
        <result column="course_id" property="courseId" />
        <result column="difficulty" property="difficulty" />
        <result column="title" property="title" />
        <result column="items" property="items" />
        <result column="right_answer" property="rightAnswer" />
        <result column="detail" property="detail" />
    </resultMap>

    <!-- 通用查询结果列 -->
    <sql id="Base_Column_List">
        create_date,
        update_date,
        delete_date,
        id, exercise_type, course_id, difficulty, title, items, right_answer, detail
    </sql>

    <select id="getPaperExercise" resultType="com.subsidy.vo.exercise.GetPaperExerciseVO">
        SELECT
            id,
            exercise_type,
            course_id,
            difficulty,
            title,
            items,
            right_answer,
            detail,
            order_no
        FROM
            exercise_dict t
        WHERE
            t.delete_date IS NULL
            AND t.paper_id = #{paperId}
            <if test="difficulty!=null and difficulty !=''">
                AND t.difficulty = #{difficulty}
            </if>
            <if test="exerciseType!=null and exerciseType !=''">
                AND t.exercise_type = #{exerciseType}
            </if>
            <if test="title !=null and title !=''">
                and t.title like concat('%',#{title} ,'%')
            </if>
        order by t.order_no

    </select>

</mapper>