Treat mailers like controllers for render gf

Author: tpope

autoload/rails.vim

@@ -1945,7 +1945,9 @@ function! s:RailsFind()
   if res != ""|return res|endif
 
   let res = s:sub(s:findfromview('render','\1'),'^/','')
-  if !buffer.type_name('controller') | let res = s:sub(res,'[^/]+$','_&') | endif
+  if !buffer.type_name('controller', 'mailer')
+    let res = s:sub(res,'[^/]+$','_&')
+  endif
   if res != ""|return res."\n".s:findview(res)|endif
 
   let res = s:findamethod('redirect_to\s*(\=\s*\%\(:action\s\+=>\|\<action:\)\s*','\1')
@@ -1963,7 +1965,7 @@ function! s:RailsFind()
   endif
   if res != ""|return res|endif
 
-  if buffer.type_name('controller')
+  if buffer.type_name('controller', 'mailer')
     let contr = s:controller()
     let view = s:findit('\s*\<def\s\+\(\k\+\)\>(\=','/\1')
     if view !=# ''