GrepPartial

" Find where a partial is called
" With no arguments it uses the current file name to do the search.
" You can also pass a string to search for and it will do a search for
" a line matching render.*<your_string>
function! GrepPartial(...)
  if a:0
    let pattern = "render.*" . a:0
  else
    let filename = substitute(expand("%:t:r:r"), "^_", "", "")
    let pattern = "render.*" . filename
  endif

  execute "grep! -Re '" . pattern . "' app/views/"
endfunction
command! -nargs=? GrepPartial call GrepPartial(<args>)