Sinatra中Active Record迁移的奇怪错误

Question

以下是我在辛特拉进行迁移的Rakefile。我有2个奇怪的错误，当我把它

未初始化的常量记录器（上线的ActiveRecord :: Base.logger = Logger.new（STDOUT））运行

不能转换成字符串整数（上线的ActiveRecord :: Migrator.migrate（'db/migrate'））

namespace :db do 

task :environment do 
    require 'active_record' 
    ActiveRecord::Base.establish_connection :adapter => 'mysql2', :port => '/Applications/MAMP/tmp/mysql/mysql.sock' 
end 

desc "Migrate the database" 
task(:migrate => :environment) do 
    #ActiveRecord::Base.logger = Logger.new(STDOUT) 
    ActiveRecord::Migration.verbose = true 
    ActiveRecord::Migrator.migrate('db/migrate') 
end 
end 

有没有人有任何想法如何解决这些问题？谢谢。

Answer 1

uninitialized constant Logger 

包含在Ruby标准库的Logger类在使用它之前：require 'logger'