Rendering different views in one action

1.case: your views are going to have similar content, but only the signed in users will have extra options like editing.

You should use a partial view and in your main view you should write something like this:

<% if signed_in? %>    <%= render 'edit_form' %><% end %>

Remember, the name of the partial should always start with a underscore, so your partial in this case would be called _edit_form.html.erb or _edit_form.html.haml, depending on what you are using.

2.case: depending on if the user is signed in or not, you want to render completely different views, then you should handle it in your controller:

def show  if signed_in?    render 'show_with_edit'  else    render 'show_without_edit`  endend

And your files would be named show_with_edit.html.erb and show_without_edit.html.erb

Also, if your view for a signed in user was called show then you could just do this:

def show  render 'show_without_edit' unless signed_in?end

3.case: if you want to change basically EVERYTHING depending if the user is signed in or not, you could create some custom methods and call them inside your original action like this:

def show   if singed_in?     show_signed_in  else    show_not_signed_in  endendprivatedef show_signed_in   # declaring some instance variables to use in the view..   render 'some_view'enddef show_not_signed_in   # declaring some other instance variables to use in the view..   render 'some_other_view'end