ActiveModel::MassAssignmentSecurity::Error: Can't mass-assign protected attributes

Question

If I try to execute the following code:

hassle = rota.hassles.create(:sender => user1, :receiver => user2, :type => \"sms\")

I oba

Answer 1

Are you working with Rails 3.2 while following a 3.1 tutorial such as the Pragmatic Programmer's "Agile Web Development with Rails" 4th edition? Then check http://guides.rubyonrails.org/3_2_release_notes.html.

Your problem is that from Rails 3.1 to 3.2 checking of mass assignment protection for Active Record models is set to 'strict' by default. Comment out the appropriate lines in these files:

config/environments/development.rb
config/environments/test.rb

... and you're good to go on learning. Remember to leave this in effect when coding your first production application :)