4

just trying to run migrations in my rails app (rails 4, ruby 2.1.2) and keep getting this error:

superclass must be a Class (Module given) (TypeError)

here is the stack:

rails g migration createCompany /home/javier/Drivers/app/models/driver.rb:1:in `<top (required)>': superclass must be a Class (Module given) (TypeError) from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `load' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `block in load_file' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:633:in `new_constants_in' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:442:in `load_file' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:342:in `require_or_load' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:480:in `load_missing_constant' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:180:in `const_missing' from /home/javier/Drivers/app/admin/driver.rb:1:in `<top (required)>' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in `load' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in `block in load' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:232:in `load_dependency' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in `load' from /home/javier/.rvm/gems/ruby-2.1.2/bundler/gems/active_admin-b8e89c747881/lib/active_admin/application.rb:179:in `block in load' from /home/javier/.rvm/gems/ruby-2.1.2/bundler/gems/active_admin-b8e89c747881/lib/active_admin/error.rb:23:in `capture' from /home/javier/.rvm/gems/ruby-2.1.2/bundler/gems/active_admin-b8e89c747881/lib/active_admin/application.rb:179:in `load' from /home/javier/.rvm/gems/ruby-2.1.2/bundler/gems/active_admin-b8e89c747881/lib/active_admin/application.rb:171:in `block in load!' from /home/javier/.rvm/gems/ruby-2.1.2/bundler/gems/active_admin-b8e89c747881/lib/active_admin/application.rb:171:in `each' from /home/javier/.rvm/gems/ruby-2.1.2/bundler/gems/active_admin-b8e89c747881/lib/active_admin/application.rb:171:in `load!' from /home/javier/.rvm/gems/ruby-2.1.2/bundler/gems/active_admin-b8e89c747881/lib/active_admin/application.rb:193:in `routes' from /home/javier/.rvm/gems/ruby-2.1.2/bundler/gems/active_admin-b8e89c747881/lib/active_admin.rb:80:in `routes' from /home/javier/Drivers/config/routes.rb:8:in `block in <top (required)>' from /home/javier/.rvm/gems/ruby-2.1.2/gems/actionpack-4.1.4/lib/action_dispatch/routing/route_set.rb:337:in `instance_exec' from /home/javier/.rvm/gems/ruby-2.1.2/gems/actionpack-4.1.4/lib/action_dispatch/routing/route_set.rb:337:in `eval_block' from /home/javier/.rvm/gems/ruby-2.1.2/gems/actionpack-4.1.4/lib/action_dispatch/routing/route_set.rb:315:in `draw' from /home/javier/Drivers/config/routes.rb:1:in `<top (required)>' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in `load' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in `block in load' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:232:in `load_dependency' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in `load' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:40:in `block in load_paths' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:40:in `each' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:40:in `load_paths' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:16:in `reload!' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:26:in `block in updater' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/file_update_checker.rb:75:in `call' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/file_update_checker.rb:75:in `execute' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:27:in `updater' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/application/finisher.rb:71:in `block in <module:Finisher>' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/initializable.rb:30:in `instance_exec' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/initializable.rb:30:in `run' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/initializable.rb:55:in `block in run_initializers' from /home/javier/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:226:in `block in tsort_each' from /home/javier/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component' from /home/javier/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:427:in `each_strongly_connected_component_from' from /home/javier/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:347:in `block in each_strongly_connected_component' from /home/javier/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:345:in `each' from /home/javier/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:345:in `call' from /home/javier/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:345:in `each_strongly_connected_component' from /home/javier/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:224:in `tsort_each' from /home/javier/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/tsort.rb:205:in `tsort_each' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/initializable.rb:54:in `run_initializers' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/application.rb:300:in `initialize!' from /home/javier/Drivers/config/environment.rb:5:in `<top (required)>' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:247:in `require' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:247:in `block in require' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:232:in `load_dependency' from /home/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:247:in `require' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/application.rb:276:in `require_environment!' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/commands/commands_tasks.rb:147:in `require_application_and_environment!' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/commands/commands_tasks.rb:133:in `generate_or_destroy' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/commands/commands_tasks.rb:51:in `generate' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/commands/commands_tasks.rb:40:in `run_command!' from /home/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.4/lib/rails/commands.rb:17:in `<top (required)>' from bin/rails:4:in `require' from bin/rails:4:in `<main>'

Driver class:

class Driver < Instructor has_one :status has_many :driver_products has_many :driver_services has_many :services, :through => :driver_services belongs_to :town belongs_to :county belongs_to :country geocoded_by :full_address after_validation :geocode, :on => :update # Include default devise modules. Others available are: # :confirmable, :lockable, :timeoutable and :omniauthable def full_address "#{self.address_line_1}" + "," + "#{self.address_line_2}" end def full_name "#{first_name}" + " " + "#{second_name}" end end

Updated gems and also try to run:

rails g devise Instructor but keep getting the same error.

*Note: I have dropped table Instructor

Any ideas anyone? Cheers J

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  • From your stacktrace: from /home/javier/Drivers/app/admin/driver.rb:1:in `<top (required)>'. Could you show this file? My guess is you have class Admin::Driver < ActiveRecord instead of class Admin::Driver < ActiveRecord::Base Commented Aug 14, 2014 at 22:40
  • 1
    If you dropped Instructor model, then no surprise you're getting this error, as your class inherit from non-existing model (if you have a folder instructor anywhere in your load path, rails creates a module with that name). If you only dropped it temporarily, change Instructor to ActiveRecord::Base, recreate the model and put it back. Commented Aug 14, 2014 at 22:51
  • 1
    @BroiSatse that helped, just having a number of other issues now. Since this is a branch of a master I will revert back to master and instead of deleting Instructor I will try modifying it. Cheers again Commented Aug 14, 2014 at 23:00
  • Good idea, it will be much simpler. :) Commented Aug 14, 2014 at 23:01

1 Answer 1

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When my migration code was like this:

class AddSalePriceToSpreeVariants < SpreeExtension::Migration def change add_column :spree_variants, :sale_price, :decimal, precision: 8, scale: 2 end end

I got the same error, Then I added rails version [6.0] in the first line of the code something like this:-

class AddSalePriceToSpreeVariants < SpreeExtension::Migration[6.0] def change add_column :spree_variants, :sale_price, :decimal, precision: 8, scale: 2 end end

Error got resolved...

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