When (not “if”) your database design gets messy, other developers have a hard time to understand methods like this: def full_address
"#{address} #{street_number}".strip
end In the case of a Rails project I’d go to db/schema.rb to understand a bit better what’s going on. I’d be really glad if someone was thoughtful enough to put a comment there. While you cannot add Ruby comments directly to db/schema.rb without them being wiped each time the file is automatically regenerated, it is possible to add database comments. Since Rails 5, you can do this also via a migration helper method called change_column_comment:
