收藏中心 多少集

src/main/resources/mapper/course/CourseDetailsDao.xml

@@ -108,8 +108,10 @@
         SELECT course_id as courseId,
                COUNT(*)  AS courseDetailsCount
         FROM course_details
-        where course_details_id
-
+        where course_details_id in
+        <foreach collection="courseIdList" item="ids" open="(" separator="," close=")">
+            #{ids}
+        </foreach>
         GROUP BY course_id
     </select>