精品课程默认排序

app/helpers/courses_helper.rb

@@ -40,9 +40,14 @@ module CoursesHelper
       a_courses << c.id
     end
     a_courses << a_tags unless a_tags.length == 0
+    ids = a_courses.flatten.uniq
+    ids_count = ids.length
+    limit = 5 - ids_count.to_i
+    sql = "SELECT distinct c.id FROM course_activities cs, courses c where cs.course_id = c.id and c.is_excellent =1 order by cs.updated_at desc;"
+    default_ecourse = Course.find_by_sql(sql).where("id is not in (?)", a_courses.ids)
+    arr_result = ids << default_ecourse
     # 过滤条件：精品课程、本身不在搜索范围
-    e_courses = Course.where("is_excellent =? and id in (?)",1,a_courses.flatten.uniq).where("id !=?",current_course.id)
-    e_courses
+    e_courses = Course.where("is_excellent =? and id in (?)",1,).where("id !=?", arr_result, current_course.id)
   end
 
   # 判断精品课程是否可见，非课程成员无法查看私有课程