课程所包含的子功能模块(enabled_modules)相关逻辑修改

app/models/member.rb

@@ -22,8 +22,9 @@ class Member < ActiveRecord::Base
   has_many :roles, :through => :member_roles
   
   belongs_to :project
+  belongs_to :course
 
-  validates_presence_of :principal, :project
+  validates_presence_of :principal
   validates_uniqueness_of :user_id, :scope => :project_id
   validate :validate_role
 

app/models/project.rb

@@ -38,7 +38,7 @@ class Project < ActiveRecord::Base
                                :conditions => "#{Principal.table_name}.type='Group' OR (#{Principal.table_name}.type='User' AND #{Principal.table_name}.status=#{Principal::STATUS_ACTIVE})"
   has_many :users, :through => :members
   has_many :principals, :through => :member_principals, :source => :principal
-   has_many :enabled_modules, :dependent => :delete_all
+  has_many :enabled_modules, :dependent => :delete_all
   has_and_belongs_to_many :trackers, :order => "#{Tracker.table_name}.position"
   has_many :issues, :dependent => :destroy, :include => [:status, :tracker]
   has_many :issue_changes, :through => :issues, :source => :journals