class Course < ActiveRecord::Base include Redmine::SafeAttributes STATUS_ACTIVE = 1 STATUS_CLOSED = 5 STATUS_ARCHIVED = 9 attr_accessible :code, :extra, :name, :state, :tea_id, :time , :location, :state, :term, :password,:is_public,:description,:class_period, :open_student #belongs_to :project, :class_name => 'Course', :foreign_key => :extra, primary_key: :identifier belongs_to :teacher, :class_name => 'User', :foreign_key => :tea_id # 定义一个方法teacher,该方法通过tea_id来调用User表 belongs_to :school, :class_name => 'School', :foreign_key => :school_id #定义一个方法school,该方法通过school_id来调用School表 has_many :bid has_many :members, :include => [:principal, :roles], :conditions => "#{Principal.table_name}.type='User' AND #{Principal.table_name}.status=#{Principal::STATUS_ACTIVE}" has_many :memberships, :class_name => 'Member' has_many :member_principals, :class_name => 'Member', :include => :principal, :conditions => "#{Principal.table_name}.type='Group' OR (#{Principal.table_name}.type='User' AND #{Principal.table_name}.status=#{Principal::STATUS_ACTIVE})" has_many :principals, :through => :member_principals, :source => :principal has_many :users, :through => :members has_many :homeworks, :through => :homework_for_courses, :source => :bid, :dependent => :destroy has_many :journals_for_messages, :as => :jour, :dependent => :destroy has_many :homework_for_courses, :dependent => :destroy has_many :student, :class_name => 'StudentsForCourse', :source => :user has_many :course_infos, :class_name => 'CourseInfos',:dependent => :destroy has_many :enabled_modules, :dependent => :delete_all has_many :boards, :dependent => :destroy, :order => "position ASC" #has_many :course_journals_for_messages, :class_name => 'CourseJournalsForMessage', :as => :jour, :dependent => :destroy has_many :news, :dependent => :destroy, :include => :author has_one :course_status, :class_name => "CourseStatus", :dependent => :destroy has_many :course_groups, :dependent => :destroy acts_as_taggable acts_as_nested_set :order => 'name', :dependent => :destroy acts_as_attachable :view_permission => :view_course_files, :delete_permission => :manage_files validates_presence_of :password, :term,:name,:description validates_format_of :class_period, :with =>/^[1-9]\d*$/ validates_format_of :name,:with =>/^[a-zA-Z0-9_\u4e00-\u9fa5]+$/ validates_length_of :description, :maximum => 10000 before_save :self_validate after_create :create_board_sync before_destroy :delete_all_members safe_attributes 'extra', 'time', 'name', 'extra', 'code', 'location', 'tea_id', 'password', 'term', 'is_public', 'description', 'class_period', 'open_student' acts_as_customizable scope :all_course scope :active, lambda { where(:status => STATUS_ACTIVE) } scope :status, lambda {|arg| where(arg.blank? ? nil : {:status => arg.to_i}) } scope :all_public, lambda { where(:is_public => true) } scope :visible, lambda {|*args| where(Course.visible_condition(args.shift || User.current, *args)) } scope :allowed_to, lambda {|*args| user = User.current permission = nil if args.first.is_a?(Symbol) permission = args.shift else user = args.shift permission = args.shift end where(Course.allowed_to_condition(user, permission, *args)) } scope :like, lambda {|arg| if arg.blank? where(nil) else pattern = "%#{arg.to_s.strip.downcase}%" where(" LOWER(name) LIKE :p ", :p => pattern) end } def visible?(user=User.current) user.allowed_to?(:view_course, self) end def parent_id_changed? false end # Returns the mail adresses of users that should be always notified on project events def recipients notified_users.collect {|user| user.mail} end # Returns the users that should be notified on project events def notified_users # TODO: User part should be extracted to User#notify_about? members.select {|m| m.principal.present? && (m.mail_notification? || m.principal.mail_notification == 'all')}.collect {|m| m.principal} end # 课程的短描述信息 def short_description(length = 255) description.gsub(/<\/?.*?>/,"").html_safe if description #description.gsub(/^(.{#{length}}[^\n\r]*).*$/m, '\1...').strip if description end # 课程的短名称信息 def short_name(length = 8) name.gsub(/<\/?.*?>/,"").html_safe if name end def strip_html(html) return html if html.empty? || !html.include?('<') output = "" tokenizer = HTML::Tokenizer.new(html) while token = tokenizer.next node = HTML::Node.parse(nil, 0, 0, token, false) output += token unless (node.kind_of? HTML::Tag) or (token =~ /^ ["#{Attachmentstype.table_name}.typeId= ?",self.attachmenttype ]) end # 获取资源后缀名列表 def contenttypes attachmenttypes if @attachmenttypes.length >0 @attachmenttypes.last().suffixArr end end def active? self.status == STATUS_ACTIVE end #课程权限判断 def allows_to?(action) if archived? # No action allowed on archived projects return false end unless active? || Redmine::AccessControl.read_action?(action) # No write action allowed on closed projects return false end # No action allowed on disabled modules if action.is_a? Hash allowed_actions.include? "#{action[:controller]}/#{action[:action]}" else allowed_permissions.include? action end end # 课程允许的权限集合 def allowed_permissions @allowed_permissions ||= begin module_names = enabled_modules.all(:select => :name).collect {|m| m.name} Redmine::AccessControl.modules_permissions(module_names).collect {|p| p.name} end end # 课程允许的动作集合 def allowed_actions @actions_allowed ||= allowed_permissions.inject([]) { |actions, permission| actions += Redmine::AccessControl.allowed_actions(permission) }.flatten end # 返回用户组可以访问的课程 def users_by_role members.includes(:user, :roles).all.inject({}) do |h, m| m.roles.each do |r| h[r] ||= [] h[r] << m.user end h end end #自定义验证 def self_validate end # 创建课程讨论区 def create_board_sync @board = self.boards.build #self.name=" #{l(:label_borad_course) }" @board.name = " #{l(:label_borad_course) }"#self.name @board.description = self.name.to_s @board.project_id = -1 if @board.save logger.debug "[Course Model] ===> #{@board.to_json}" else logger.error "[Course Model] ===> Auto create board when course saved, because #{@board.full_messages}" end end # 新增课程留言 # add by nwb def self.add_new_jour(user, notes, id, options={}) course = Course.find(id) if options.count == 0 pjfm = course.journals_for_messages.build(:user_id => user.id, :notes => notes, :reply_id => 0) else pjfm = course.journals_for_messages.build(options) end pjfm.save pjfm end # 删除课程所有成员 def delete_all_members if self.members && self.members.count > 0 me, mr = Member.table_name, MemberRole.table_name connection.delete("DELETE FROM #{mr} WHERE #{mr}.member_id IN (SELECT #{me}.id FROM #{me} WHERE #{me}.course_id = #{id})") Member.delete_all(['course_id = ?', id]) end end def get_endup_time begin end_time = Time.parse(self.endup_time) rescue Exception => e end_time = Time.parse("3000-01-01") Rails.logger.error "[Error] course endup_time error. ===> #{e}" ensure return end_time end end def get_time begin time = Date.new(self.time).to_time rescue Exception => e time = Time.parse("3000-01-01") Rails.logger.error "[Error] course time error. ===> #{e}" ensure return time end end def self.allowed_to_condition(user, permission, options={}) perm = Redmine::AccessControl.permission(permission) base_statement = (perm && perm.read? ? "#{Course.table_name}.status <> #{Course::STATUS_ARCHIVED}" : "#{Course.table_name}.status = #{Course::STATUS_ACTIVE}") if perm && perm.course_module base_statement << " AND #{Course.table_name}.id IN (SELECT em.course_id FROM #{EnabledModule.table_name} em WHERE em.name='#{perm.course_module}')" end if options[:course] course_statement = "#{Course.table_name}.id = #{options[:course].id}" course_statement << " OR (#{Course.table_name}.lft > #{options[:course].lft} AND #{Course.table_name}.rgt < #{options[:course].rgt})" if options[:with_subcourses] base_statement = "(#{course_statement}) AND (#{base_statement})" end if user.admin? base_statement else statement_by_role = {} unless options[:member] role = user.logged? ? Role.non_member : Role.anonymous if role.allowed_to?(permission) statement_by_role[role] = "#{Course.table_name}.is_public = #{connection.quoted_true}" end end if user.logged? user.courses_by_role.each do |role, courses| if role.allowed_to?(permission) && courses.any? statement_by_role[role] = "#{Course.table_name}.id IN (#{courses.collect(&:id).join(',')})" end end end if statement_by_role.empty? "1=0" else if block_given? statement_by_role.each do |role, statement| if s = yield(role, user) statement_by_role[role] = "(#{statement} AND (#{s}))" end end end "((#{base_statement}) AND (#{statement_by_role.values.join(' OR ')}))" end end end #项目与课程分离后,很多课程的名称等信息为空,这些数据信息存储在项目表中!!就是数据兼容的问题 #def name # read_attribute('name') || Project.find_by_identifier(self.extra).try(:name) #end end