Allows multiple roles on the same project (#706). Prerequisite for user groups feature.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2726 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20090503121501_create_member_roles.rb

@@ -0,0 +1,12 @@
+class CreateMemberRoles < ActiveRecord::Migration
+  def self.up
+    create_table :member_roles do |t|
+      t.column :member_id, :integer, :null => false
+      t.column :role_id, :integer, :null => false
+    end
+  end
+
+  def self.down
+    drop_table :member_roles
+  end
+end

db/migrate/20090503121505_populate_member_roles.rb

@@ -0,0 +1,11 @@
+class PopulateMemberRoles < ActiveRecord::Migration
+  def self.up
+    Member.find(:all).each do |member|
+      MemberRole.create!(:member_id => member.id, :role_id => member.role_id)
+    end
+  end
+
+  def self.down
+    MemberRole.delete_all
+  end
+end

db/migrate/20090503121510_drop_members_role_id.rb

@@ -0,0 +1,9 @@
+class DropMembersRoleId < ActiveRecord::Migration
+  def self.up
+    remove_column :members, :role_id
+  end
+
+  def self.down
+    raise IrreversibleMigration
+  end
+end