CourseFieldMappingMapper.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.CourseFieldMappingMapper">

    <!-- 通用查询映射结果 -->
    <resultMap id="BaseResultMap" type="com.subsidy.model.CourseFieldMappingDO">
        <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="course_id" property="courseId" />
        <result column="field_mapping" property="fieldMapping" />
    </resultMap>

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

    <select id="courseFields" parameterType="long" resultType="com.subsidy.model.FieldDictDO">
        SELECT
            t2.id,
            t2.field_name,
            t2.create_date
        FROM
            course_field_mapping t
            LEFT JOIN field_dict t2 ON t.field_id = t2.id
        WHERE
            t.delete_date IS NULL
            AND t2.delete_date IS NULL
            AND t.course_id = #{courseId}
    </select>

</mapper>