The rails.vim plugin comes with a
lot of handy helpers for quickly navigating to many parts of a Rails
project. Among these helpers is the :Emigration command that makes it easy
to tab complete and navigate to Rails migration files. Often times the
migration you want is the latest migration. There is no need for tab
complete here, just type:
:Emigration
By default this command opens the latest migration in a new buffer.
See :h rails-:Emigration for more details.