Redmine

# in app/controllers/issue_controller.rb in
def show
  @changesets = @issue.changesets.visible.includes([:repository, :user, :issues]).all

# in app/helper/issues_helper in :
def render_descendants_tree(issue)
  issue_list(issue.descendants.visible.includes([:status, :priority, :tracker]).sort_by(&:lft)) do |child, level|