# @user_activities = UserActivity.where("container_type = 'Course' and container_id in #{user_course_ids} and act_type = 'HomeworkCommon'").order('updated_at desc').limit(10).offset(@page * 10)
# when "course_news"
# @user_activities = UserActivity.where("container_type = 'Course' and container_id in #{user_course_ids} and act_type = 'News'").order('updated_at desc').limit(10).offset(@page * 10)
# when "course_message"
# @user_activities = UserActivity.where("container_type = 'Course' and container_id in #{user_course_ids} and act_type = 'Message'").order('updated_at desc').limit(10).offset(@page * 10)
# when "course_poll"
# @user_activities = UserActivity.where("container_type = 'Course' and container_id in #{user_course_ids} and act_type = 'Poll'").order('updated_at desc').limit(10).offset(@page * 10)
# when "course_journals"
# @user_activities = UserActivity.where("container_type = 'Course' and container_id in #{user_course_ids} and act_type = 'JournalsForMessage'").order('updated_at desc').limit(10).offset(@page * 10)
# when "project_issue"
# @user_activities = UserActivity.where("container_type = 'Project' and container_id in #{user_project_ids} and act_type = 'Issue'").order('updated_at desc').limit(10).offset(@page * 10)
# when "project_message"
# @user_activities = UserActivity.where("container_type = 'Project' and container_id in #{user_project_ids} and act_type = 'Message'").order('updated_at desc').limit(10).offset(@page * 10)
# when "user_journals"
# @user_activities = UserActivity.where("container_type = 'Principal' and act_type= 'JournalsForMessage' and container_id = #{@user.id}").order('updated_at desc').limit(10).offset(@page * 10)
# when "current_user"
# @user_activities = UserActivity.where("user_id = #{@user.id} and ((container_type = 'Project' and container_id in #{user_project_ids} and act_type in #{project_types}) or (container_type = 'Course' and container_id in #{user_course_ids} and act_type in #{course_types}))").order('updated_at desc').limit(10).offset(@page * 10)
# @user_activities = UserActivity.where("(container_type = 'Project' and container_id in #{user_project_ids} and act_type in #{project_types})" +
# "or (container_type = 'Course' and container_id in #{user_course_ids} and act_type in #{course_types}) "+
# "or (container_type = 'Principal' and act_type= '#{principal_types}' and container_id = #{@user.id}) " +
# "or (container_type = 'Blog' and act_type= 'BlogComment' and container_id in #{blog_ids})").order('updated_at desc').limit(10).offset(@page * 10)
# end
# else
# # @user_activities = UserActivity.where("(container_type = 'Project' and container_id in #{user_project_ids} and act_type in #{project_types}) or (container_type = 'Course' and container_id in #{user_course_ids} and act_type in #{course_types})or (container_type = 'Principal' and act_type= '#{principal_types}' and container_id = #{@user.id})").order('updated_at desc').limit(10).offset(@page * 10)