[Rails] routing error in partial when rendered from another controller

On 19 March 2012 16:12, Erwin wrote:
in my routes.rb  I have  a route

resources :projects  do
member do
put "change_photo"
end
end

checked with rake routes CONTROLLER=projects
from my  projects#show  I render a partial with a form in it
def show
@project = Project.find(params[:id])
..
end

VIEWS
projects/show.html.haml
.span4= render :partial => "projects/right_show"

projects/_right_show.html.haml
..
= form_for @project, :url => change_photo_project_path, :html =>
{ :multipart => true , :method => :put} do |f|
= f.file_field :photo
= f.submit t(:update)

this is working fine

Now I am trying to display the same partial from another controller ,
orders#new

orders_controller.rb
def new
@project = Project.find(params[:project_id])
end

VIEWS
orders/new.html.haml
.span4= render :partial => "projects/right_show"

but then I get a routing error
No route matches {:action=>"change_photo", :controller=>"projects"}
Try running rake routes for more information on available routes

I tried to pass the @project object
= render :partial => "projects/right_show", :object => @project

but no way ,   Routing Error ..
and the rake routes doesn't show me anything wrong or missing ...