课程动态api改变

查看学生作业总平均分列表

app/api/mobile/apis/courses.rb

@@ -311,6 +311,18 @@ module Mobile
            present :data,news,with:Mobile::Entities::News
           present :status,0
         end
+
+        desc '课程历次作业总成绩列表'
+        params do
+          requires :token,type:String
+          requires :course_id,type:Integer,desc:'课程id'
+          optional :page,type:Integer,desc:'页码'
+        end
+        get ':course_id/students_score_list' do
+          cs = CoursesService.new
+          news = cs.students_score_list params,current_user
+          present :data,news,with:Mobile::Entities::User
+        end
       end
     end
   end

app/api/mobile/entities/course_dynamic.rb

@@ -97,6 +97,16 @@ module Mobile
         obj
       end
 
+      expose :better_students,using:Mobile::Entities::User do |f,opt|
+        obj = nil
+        f[:dynamics].each do |d|
+          if d[:type] == 6
+            obj =  d[:better_students]
+          end
+        end
+        obj
+      end
+
     end
   end
 end

app/api/mobile/entities/user.rb

@@ -22,6 +22,8 @@ module Mobile
                   get_user_location u  unless u.user_extensions.nil?
                 when :brief_introduction
                   u.nil? || u.user_extensions.nil? ? "" : u.user_extensions.brief_introduction
+                when :student_num
+                  u.nil? || u.user_extensions.nil? ? "" : u.user_extensions.student_id
               end
             end
           end
@@ -47,6 +49,10 @@ module Mobile
       user_expose :location
       #签名
       user_expose :brief_introduction
+      #总成绩
+      user_expose :score
+      #学号
+      user_expose :student_num
     end
   end
 

app/services/courses_service.rb

@@ -666,7 +666,13 @@ class CoursesService
       latest_course_dynamics = []
       dynamics_count = 0
       # 课程学霸 学生总分数排名靠前的5个人
-
+      homework_count = course.homework_commons.count
+      unless homework_count == 0
+         sql = "select users.*,sum(IFNULL(0,student_works.final_score))/#{homework_count} score from student_works left outer join users on student_works.user_id = users.id" <<
+         " where  homework_common_id in ( select id from homework_commons where homework_commons.course_id = #{course.id}) GROUP BY student_works.user_id ORDER BY score limit 0,5"
+         latest_course_dynamics <<{:type=> 6,:time=>Time.now.to_s,:count=> 5,:better_students=> User.find_by_sql(sql)}
+         dynamics_count += 1
+      end
       # 课程通知
       latest_news = course.news.page(1).per(2).order("created_on desc")
       unless latest_news.first.nil?
@@ -707,5 +713,14 @@ class CoursesService
     result
   end
 
+  # 获取课程历次作业的学生总成绩
+  def students_score_list params,current_user
+    homework_count = Course.find(params[:course_id]).homework_commons.count
+    page = (params[:page] || 1)  - 1
+    sql = "select users.*,sum(IFNULL(0,student_works.final_score))/#{homework_count} score from student_works left outer join users on student_works.user_id = users.id" <<
+        " where  homework_common_id in ( select id from homework_commons where homework_commons.course_id = #{params[:course_id]}) GROUP BY student_works.user_id ORDER BY score limit #{page*10},10"
+    User.find_by_sql(sql)
+  end
+
 end