socialforge/app/helpers/courses_helper.rb

# encoding: utf-8
## This helper be included in applicationHelper
module CoursesHelper
=begin
1. define TeacherRoles, StudentRoles
2. define count function
3. define search by roles
4. define search member function
=end
  TeacherRoles = [3, 4, 7, 9]
  StudentRoles = [5, 10]

  ## return people count

  # 返回教师数量，即roles表中定义的Manager
  def teacherCount project
    # searchCountByRoles project, TeacherRoles
    # or
    searchTeacherAndAssistant(project).count
  end

  # 返回学生数量，即roles表中定义的Reporter
  def studentCount project
    # searchCountByRoles project,StudentRoles
    # or
    searchStudent(project).count
  end

  # =====================================================================================
  # return people list
  def searchTeacherAndAssistant project
    searchPeopleByRoles(project, TeacherRoles)
  end

  def searchStudent project
    searchPeopleByRoles(project, StudentRoles)
  end
  # =====================================================================================

  def searchCountByRoles project, roles_id
    people = searchPeopleByRoles project, roles_id
    people.count
  end

  def searchPeopleByRoles project, roles_id
    people = []
    begin
      people = project.members.joins(:member_roles).where("member_roles.role_id IN (:role_id)", {:role_id => roles_id})
    rescue Exception => e
      logger.error "[CoursesHelper] ===> #{e}"
    end
    people
  end

  #useless
  def searchPeopleByRole project, role_id
    people = []
    begin
      people = project.members.joins(:member_roles).where("member_roles.role_id = :role_id", {:role_id => role_id })
    rescue Exception => e
      logger.error "[CoursesHelper] ===> #{e}"
    end
    people
  end

  def findCourseTime project
    str = ""
    begin
      @course = Course.find_by_extra(@project.identifier)
      date_format = l(:zh_date)[:formats][:default]
      if @course
        str = DateTime.parse(@course.setup_time.to_s).strftime("#{date_format}").to_s unless @course.setup_time.blank?
        str <<  '-' unless  @course.setup_time.blank?
        str <<  DateTime.parse(@course.endup_time.to_s).strftime("#{date_format}").to_s unless @course.endup_time.blank?
      end
    rescue Exception => e
      logger.error  "[CoursesHelper] ===> #{e}"
    end
    str
  end
end