rake db:migrate problems with using paperclip

Question

I installed paperclip 2.7 using gem install. I did rails generate paperclip user photo. and then tried migrate the db. But it gave me an error. SQLite3::SQLException: duplicate column name: photo_file_name: ALTER TABLE "users" ADD "photo_file_name" varchar(255)

I read somewhere that I should do delete the development.rb and then do db:create and them migrate again. But that didn't work either. When I did db:create it said already exists. So...I ended up reverting back to my old commit hoping to start again. But when I do db:reset. it tell me i have two migrations left. These two migrations are from rails generate paperclip user photo. What do I do now? How am I to get this to work?

Answer 1

if you don't have any data that is important and needs to be saved you can simply drop the db and migrate it all the way back up:

rake db:drop

rake db:create

rake db:migrate

Answer 2

Run a migration removing photo_file_name, thus:

def change
  change_table :users do |t|
    t.remove :photo_file_name
  end
end

And start again.