修改一些小bug

app/api/mobile/apis/courses.rb

@@ -340,7 +340,7 @@ module Mobile
         get ':course_id/student_works_list' do
           cs = CoursesService.new
           student_works = cs.student_work_list params,current_user
-          present :data,student_works.all,with:Mobile::Entities::StudentWork
+          present :data,student_works,with:Mobile::Entities::StudentWork
           present :status,0
         end
 

app/services/courses_service.rb

@@ -654,9 +654,9 @@ class CoursesService
       return
     end
     if current_user == @user || current_user.admin?
-      membership = @user.coursememberships.page(1).per(5)
+      membership = @user.coursememberships.page(1).per(15)
     else
-      membership = @user.coursememberships.page(1).per(5).all(:conditions => Course.visible_condition(current_user))
+      membership = @user.coursememberships.page(1).per(15).all(:conditions => Course.visible_condition(current_user))
     end
     if membership.nil? || membership.count == 0
       raise l(:label_no_courses, :locale => get_user_language(current_user))