Attempt model annotation only if table exists

[davejachimiak]

Say a developer begins constructing class Foo < ActiveRecord::Base and class Bar < ActiveRecord::Base. When she creates a migration to create a table for Foo, does rake db:migrate, she'll get an error from Annotate via the ActiveRecord adapter explaining that the bars table doesn't exist. Regardless of whether this is a good development practice, the error message is an annoyance.

[mykecameron]

👍

[wm]

I support this 👍

This is especially important when you want to run rollbacks and migrates too.

[ctran]

Do you mind re-submit this against master so I don't have to resolve the conflict manually?
Thanks.

[davejachimiak]

@ctran rebased. Thanks!