Rake migration aborted

Question

I'm running Ruby 2.0.0 and I installed it correctly. Just loaded up a gem 'devise' and as I tried to migrate my database changes, it wouldn't work:

$ rake db:migrate rake aborted! attr_accessible is extracted out of Rails into a gem. Please use new recommended protection model for params(strong_parameters) or add protected_attributes to your Gemfile to use old one.

Then, following another Stackoverflow post, they recommended installing Bundler. I did that successfully and got this:

$ bundle exec rake db:migrate rake aborted! attr_accessible is extracted out of Rails into a gem. Please use new recommended protection model for params(strong_parameters) or add protected_attributes to your Gemfile to use old one.

Is anyone up to the challenge to help?

Since it seems like you are new to Rails, if you want to learn with Rails 4 I suggest taking a look at Hartl's Rails Tutorial which now covers Rails 4 and Ruby 2. — Althaf Hameez

Aleksei Matiushkin Aleksei Matiushkin · Accepted Answer · 2013-07-01T04:23:04

It looks like you are trying to use Rails 4.0.0beta which is not (IMHO) the best choice for a newbie. You’d better switch back to Rails 3* and yield all the advantages of well-documented, tested rock-n-rolling environment. If you still decide to stick to Rails 4… Previously there were no strict rules to deal with mass-assignment. Rails 4 standardises this with Strong Parameters, which has been merged into rails core. Thus, you are to do smth like:

# controllers/my_controller.rb
def create
    @app = MyApp.new(my_params)
  if @app.save
    redirect_to app_path(@app)
  else
    render :new, alert: 'There was a problem'
  end
end

private

def my_params
  params.require(:app).permit(:title, :password)
end

The assignment logic is now being encapsulated in a private method to permit certain values to act as params.

Rake migration aborted

2 Answers