fix school data grow list error

app/controllers/managements/schools_controller.rb

@@ -25,8 +25,8 @@ class Managements::SchoolsController < Managements::BaseController
     service = Management::SchoolDataGrowService.new(params)
     @grow_summary = service.grow_summary
 
-    reports = service.call
+    @obj_count, @reports = service.call
-    @reports = paginateHelper reports
+    @obj_pages = Paginator.new(@obj_count, Management::SchoolDataGrowService::PAGE_SIZE, params[:page])
   end
 
   def data_contrast

app/services/management/school_data_grow_service.rb

@@ -1,6 +1,8 @@
 class Management::SchoolDataGrowService
   include CustomSortable
 
+  PAGE_SIZE = 20
+
   attr_reader :params
 
   sort_columns :teacher_increase_count, :student_increase_count,
@@ -12,7 +14,23 @@ class Management::SchoolDataGrowService
   end
 
   def call
-    custom_sort(query_reports, params[:sort_by], params[:sort_direction])
+    reports = query_reports.group(:school_id)
+
+    count = reports.count.count
+
+    reports = reports.select(
+      'school_id, school_name,'\
+      'SUM(teacher_increase_count) teacher_increase_count,'\
+      'SUM(student_increase_count) student_increase_count,'\
+      'SUM(course_increase_count) course_increase_count,'\
+      'SUM(shixun_increase_count) shixun_increase_count,'\
+      'SUM(active_user_count) active_user_count'
+    )
+
+    reports = custom_sort(reports, params[:sort_by], params[:sort_direction])
+    reports = reports.limit(PAGE_SIZE).offset(offset)
+
+    [count, reports]
   end
 
   def grow_summary
@@ -56,4 +74,8 @@ class Management::SchoolDataGrowService
     # 每日凌晨5点为节点, 25日凌晨4点、3点、2点等等，未到更新数据时间点，看到的数据是：23日-24日的统计数据
     (Time.zone.now - 5.hours).beginning_of_day - 1.days
   end
+
+  def offset
+    (params[:page].to_i.zero? ? 0 : params[:page].to_i - 1) * PAGE_SIZE
+  end
 end