Question

I am trying to run an active record migration but am receiving the following error:

undefined method info for nil:NilClass

Here is the 2 lines of code in my rake task that runs the migration

ActiveRecord::Base.establish_connection(YAML::load(File.open( src/SupporterSync.Core/Database/Database.yml )))
ActiveRecord::Migrator.migrate( src/SupporterSync.Core/Database/Migrations , ENV["VERSION"] ? ENV["VERSION"].to_i : nil )

And here is my only migration class in the folder

class InitialMigration < ActiveRecord::Migration
  def self.up
    create_table :Accounts, :primary_key => :Id do |t|
      t.string :ListId, :limit => 36, :null => false
      t.string :Name, :limit => 31, :null => false
      t.string :FullName, :limit => 31, :null => false
      t.string :ParentListId, :limit => 36
    end
  end
  def self.down
    drop_table :Accounts
  end
end

And here is the trace statement:

** Invoke migrate (first_time)
** Execute migrate
rake aborted!
undefined method info for nil:NilClass C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/migration.rb :473:inmigrate
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/migration.rb :472:in each C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/migration.rb :472:inmigrate
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/migration.rb :400:in up C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/migration.rb :383:inmigrate
E:/Working/Code/WMF/SupporterSync/rakefile.rb:19
C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in call C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:inexecute
C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in each C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:inexecute
C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in invoke_with_call_c hain C:/Ruby/lib/ruby/1.8/monitor.rb:242:insynchronize
C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in invoke_with_call_c hain C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:ininvoke
C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in invoke_task C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:intop_level
C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in each C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:intop_level
C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in standard_exceptio n_handling C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:intop_level
C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in run C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:instandard_exceptio n_handling
C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in run C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31 C:/Ruby/bin/rake:19:inload
C:/Ruby/bin/rake:19

Answer 1

I suggest following Rails conventions and making your table + field names lowercase_and_underscored rather than CamelCasing. Some macros such as belongs_to look for the lowercase variants and by using them you make your life a lot easier. I m sorry this does not quite answer your question.

Also, the primary key is "id" by default, so you don t need to set it.

Thirdly, migrations are usually run with rake db:migrate.

Lastly, the reason you re getting that error is that you re setting up ActiveRecord::Base and not defining a logger object on it, like Rails does for you when you run any task descending from :environment. For more information, see this line in the Rails source.

Answer 2

I turned off active_record logger (config.active_record.logger = nil) and came across this problem. I solved it by adding a logger back:

config.active_record.logger=Logger.new(STDOUT)

I added the code to config/environment/xxx.rb.

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