title: How to pass a param from one view to another in Ruby on Rails, using POST
body: <p>I feel like this should be an easy thing to figure out, but I'm stumped.</p>
  
  <p>I have a value in a Project's instance variable called ID. I want to pass that value to a new Photos page to associate each photo that is created with that specific project, but I don't want the Project's ID to show up in the visible query string.</p>
  
  <p>I've tried using link_to and button_to, but (I suspect) since I'm using "resources :photos" in my routes, all of the requests that come to photo#new are being interpreted as GET instead of POST.</p>
  
  <p>Helllllllllllllllp!</p>
  
  <p>Thanks to anyone that can give me some insight, I'v been killing myself over this for the past hour or two already.</p>
  
  <p>--Mark</p>