Rails rake db：使用生成的模型迁移异常终止

有人能告诉我我做错了什么吗？

我运行script/generate model CityZipMSA city:string state:string zip:integer MSA:integer

然后运行rake db:migrate ，出现以下错误

（在/ Users / MMyself / app_dev / property）rake中止！ 发生错误，取消了以后的所有迁移：

未初始化的常量CreateCityZipMsas

我的迁移文件：

    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

当我运行rake db:migrate --trace

我明白了

（in / Users / MMyself / app_dev / property）**调用db：migrate（first_time）**调用环境（first_time）**执行环境**执行db：迁移rake中止！ 发生错误，取消了以后的所有迁移：

未初始化的常量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:in const_missing' load_missing_constant' /Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:80:in /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:in MMyself/ const_missing' /Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activesupport-2.3.8/lib/active_support/inflector.rb:364:in ruby- const_missing' /Users/MMyself/.rvm/gems/ruby-1.8.7-p249/gems/activesupport-2.3.8/lib/active_support/inflector.rb:364:in gems/ const_missing' 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---

你有：

类CreateCityZipMSAs <ActiveRecord :: Migration

错误是：

未初始化的常量CreateCityZipMsas

尝试将您的迁移重命名为CreateCityZipMsas 。

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