aircraft-server/aircraft-system/src/main/resources/mapper/EmScenicMapper.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.aircraft.modules.system.mapper.EmScenicMapper">

    <select id="findByAreaIdAndName" resultType="com.aircraft.modules.system.domain.EmScenic">
        SELECT id,
               area_id,
               name,
               people_num,
               remark,
               create_by,
               create_time,
               update_by,
               update_time,
               del_flag
        FROM em_scenic
        WHERE area_id = #{areaId}
          AND name = #{name}
          AND del_flag = 0
    </select>

    <select id="countByAreaId" parameterType="com.aircraft.modules.system.domain.vo.AreaNumStatisVo"
            resultType="com.aircraft.modules.system.domain.vo.AreaNumStatisVo">
        select area_id, count(id) as scenicNum
        from em_scenic
        where del_flag = 0
        group by area_id
    </select>
    <select id="getScenicNameMap" resultType="java.util.HashMap">
        SELECT
        id AS "scenicId", -- 更明确的别名
        name AS "scenicName"
        FROM em_scenic
        WHERE del_flag = 0
        <!-- 确保参数正确传递，并且当scenicIds为空时的处理逻辑 -->
        <if test="scenicIds != null">
            <if test="scenicIds.size() > 0">
                AND id IN
                <foreach collection="scenicIds" item="id" open="(" separator="," close=")">
                    #{id}
                </foreach>
            </if>
            <if test="scenicIds.size() == 0">
                <!-- 当传入空列表时，确保不返回任何结果 -->
                AND 1 = 0
            </if>
        </if>
        <if test="scenicIds == null">
            AND 1 = 0
        </if>
    </select>

    <select id="listByIds" resultType="com.aircraft.modules.system.domain.EmScenic">
        SELECT * FROM em_scenic
        WHERE id IN
        <foreach collection="list" item="id" open="(" separator="," close=")">
            #{id}
        </foreach>
    </select>
</mapper>