admins增加实践课程

app/controllers/concerns/base/paginate_helper.rb

@@ -1,6 +1,11 @@
 module Base::PaginateHelper
   extend ActiveSupport::Concern
 
+  def default_sort(sort_by, direction)
+    params[:sort_by]        = params[:sort_by].presence || sort_by
+    params[:sort_direction] = params[:sort_direction].presence || direction
+  end
+
   def offset
     (page - 1) * per_page
   end

app/queries/admins/subject_query.rb

@@ -0,0 +1,47 @@
+class Admins::SubjectQuery < ApplicationQuery
+  include CustomSortable
+
+  attr_reader :params
+
+  sort_columns :created_at, default_by: :created_at, default_direction: :desc, default_table: 'subjects'
+
+  def initialize(params)
+    @params = params
+  end
+
+  def call
+    subjects = Subject.all
+
+    subjects = subjects.where(id: params[:id]) if params[:id].present?
+
+    # 状态过滤
+    status =
+      case params[:status].to_s.strip
+      when 'pending'   then 0
+      when 'applying'  then 1
+      when 'published' then 2
+      end
+    subjects = subjects.where(status: status) if status
+
+    # 创建者单位
+    if params[:school_id].present?
+      subjects = subjects.joins(user: :user_extension).where(user_extensions: { school_id: params[:school_id] })
+    end
+
+    # 首页展示、金课
+    %i[homepage_show excellent].each do |column|
+      if params[column].present? && params[column].to_s == 'true'
+        subjects = subjects.where(column => true)
+      end
+    end
+
+    # 关键字
+    keyword = params[:keyword].to_s.strip
+    if keyword
+      sql = 'CONCAT(lastname, firstname) LIKE :keyword OR subjects.name LIKE :keyword'
+      subjects = subjects.joins(:user).where(sql, keyword: "%#{keyword}%")
+    end
+
+    custom_sort(subjects, params[:sort_by], params[:sort_direction])
+  end
+end