Rails 4: schema.db shows “Could not dump table ”events“ because of following NoMethodError# undefined method `[]' for nil:NilClass”

Question

I\'ve been working on a Rails 4.0 application with sqlite (default for Rails development environment) for events (hackathons) which has a parent model, Event, for which ther

Answer 1

Just in case this helps someone. I was doing this on a sqlite dev db, and as mentioned above, it was likely in a wonky state from all my experimental migrations. By deleting the sqlite file, recreating and running all the migrations, it is now fine.

Answer 2

I think your last migration is wrong. I would change it to this:

class AddEventRefToPressBlurbs < ActiveRecord::Migration
  def change
    add_reference :press_blurb, :event
  end
end

Unfortunately, your database is likely in a wonky state because it has an invalid column type (i.e. there is no 'reference' column type, but sqlite made it anyway). Hopefully, it's just a development database so you can just delete it and start fresh.