Question

Can someone tell me what I have done wrong?

I ran script/generate model CityZipMSA city:string state:string zip:integer MSA:integer

And then ran rake db:migrate and I get the following error

(in /Users/MMyself/app_dev/property)
rake aborted!
An error has occurred, this and all later migrations canceled:

uninitialized constant CreateCityZipMsas

My migration file:

    class CreateCityZipMSAs < ActiveRecord::Migration
  def self.up
    create_table :city_zip_msas do |t|
      t.string :city
      t.string :state
      t.integer :zip
      t.integer :MSA

      t.timestamps
    end
  end

  def self.down
    drop_table :city_zip_msas
  end
end

When I run rake db:migrate --trace

I get

(in /Users/MMyself/app_dev/property)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:migrate
rake aborted!
An error has occurred, this and all later migrations canceled:

uninitialized constant CreateCityZipMsas
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:443:in load_missing_constant'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:80:inconst_missing’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:92:in const_missing'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activesupport-2.3.8/lib/active_support/inflector.rb:364:inconstantize’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activesupport-2.3.8/lib/active_support/inflector.rb:363:in each'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activesupport-2.3.8/lib/active_support/inflector.rb:363:inconstantize’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activesupport-2.3.8/lib/active_support/core_ext/string/inflections.rb:162:in constantize'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/migration.rb:374:inload_migration’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/migration.rb:369:in migration'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/migration.rb:365:inmigrate’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/migration.rb:491
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/migration.rb:565:in call'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/migration.rb:565:inddl_transaction’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/database_statements.rb:136:in transaction'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/transactions.rb:182:intransaction’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/migration.rb:565:in ddl_transaction'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/migration.rb:490:inmigrate’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/migration.rb:477:in each'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record>/migration.rb:477:inmigrate’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/migration.rb:401:in up'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activerecord-2.3.8/lib/active_record/migration.rb:383:inmigrate’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rails-2.3.8/lib/tasks/databases.rake:112
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:636:in call'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:636:inexecute’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:631:in each'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:631:inexecute’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:597:in invoke_with_call_chain'
/Users/MMyself/.rvm/rubies/ruby-1.8.7-p249/lib/ruby/1.8/monitor.rb:242:insynchronize’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:590:in invoke_with_call_chain'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:583:ininvoke’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:2051:in invoke_task'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:2029:intop_level’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:2029:in each'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:2029:intop_level’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:2068:in standard_exception_handling'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:2023:intop_level’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:2001:in run'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:2068:instandard_exception_handling’
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/lib/rake.rb:1998:in run'
/Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/rake-0.8.7/bin/rake:31
/Users/MMyself/.rvm/rubies/ruby-1.8.7-p249/bin/rake:24:inload’
/Users/MMyself/.rvm/rubies/ruby-1.8.7-p249/bin/rake:24

Answer 1

You have:

class CreateCityZipMSAs < ActiveRecord::Migration

And the error is:

uninitialized constant CreateCityZipMsas

Try to rename your migration to CreateCityZipMsas.