redmine_hook_example.rb

class DefaultAssignProjectHook < Redmine::Hook::ViewListener

  # context:
  # * :form - the form builder
  # * :project - the current project
  def view_projects_form(context={})

    return content_tag(:p,
                       context[:form].select(:default_assignee_id,  context[:project].assignable_users.collect {|user| [user.name, user.id]}, {:include_blank => :none}))

  end
end