Sinatra中Active Record遷移的奇怪錯誤

Question

以下是我在辛特拉進行遷移的Rakefile。我有2個奇怪的錯誤，當我把它

未初始化的常量記錄器（上線的ActiveRecord :: Base.logger = Logger.new（STDOUT））運行

不能轉換成字符串整數（上線的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 

有沒有人有任何想法如何解決這些問題？謝謝。

Answer 1

uninitialized constant Logger 

包含在Ruby標準庫的Logger類在使用它之前：require 'logger'