Sinatra中活动记录迁移的奇怪错误

Question

下面是我在辛特拉迁移的Rakefile文件。当我运行它的时候，我得到了两个奇怪的错误

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

无法将字符串转换为整数(在行迁移(‘db/ActiveRecord：：Migrator.migrate’)上)

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

有谁知道怎么解决这些问题吗？谢谢。

Answer 1

uninitialized constant Logger

在使用之前，将Logger类包含在Ruby标准库中：require 'logger'