修复过期课程查询有重复课程

src/main/java/com/peanut/modules/medical/service/impl/CourseServiceImpl.java

@@ -288,10 +288,10 @@ public class CourseServiceImpl extends ServiceImpl<CourseDao, CourseEntity> impl
             List<Map<String,Object>> res = new ArrayList<>();
             //如果过期又开通，去除
             for (Map<String,Object> c : courseEntities) {
-                UserCourseBuyEntity ucb = userCourseBuyDao.selectOne(new LambdaQueryWrapper<UserCourseBuyEntity>()
+                int ucb = userCourseBuyDao.selectCount(new LambdaQueryWrapper<UserCourseBuyEntity>()
                         .eq(UserCourseBuyEntity::getUserId,param.get("userId"))
                         .eq(UserCourseBuyEntity::getCatalogueId,c.get("catalogueId")));
-                if (ucb == null) {
+                if (ucb == 0) {
                     res.add(c);
                 }
             }