我正在按照Michael Hartl的Rails教程进行学习，链接在此：http://ruby.railstutorial.org/chapters/modeling-and-viewing-users-one#top。我使用以下命令在一个单独的窗口中跟踪SQL查询：
这里是 rails 控制台的输出：
tail -f log/development.log
然而，当我在受沙盒限制的Rails控制台中时，日志没有更新SQL语句，而是显示在Rails控制台中。我该如何更正这种行为？
我应该补充说明，我的数据库迁移和数据模型更改（新表等）在日志中得到了反映。只有由Rails控制台内部方法传播的SQL语句被省略了（并且显示在Rails控制台中）。
这是我的Gemfile：
source 'http://rubygems.org'
gem 'rails', '3.1.0'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem 'sqlite3'
group :development do
gem 'rspec-rails', '2.6.1'
gem 'annotate', :git => 'git://github.com/ctran/annotate_models.git'
end
group :test do
gem 'rspec-rails', '2.6.1'
gem 'webrat', '0.7.3'
gem 'spork', '0.9.0.rc8'
gem 'guard-spork'
gem 'autotest', '4.4.6'
gem 'autotest-rails-pure', '4.1.2'
gem 'autotest-fsevent', '0.2.4'
gem 'autotest-growl', '0.2.9'
end
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', " ~> 3.1.0"
gem 'coffee-rails', "~> 3.1.0"
gem 'uglifier'
end
gem 'jquery-rails'
# Use unicorn as the web server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
# To use debugger
# gem 'ruby-debug19', :require => 'ruby-debug'
这里是 rails 控制台的输出：
Larson-2:sample larson$ rails console --sandbox
Loading development environment in sandbox (Rails 3.1.0)
Any modifications you make will be rolled back on exit
ruby-1.9.2-p290 :001 > user = User.create(:name => "A Nother", :email => "another@example.org")
(0.1ms) SAVEPOINT active_record_1
SQL (13.4ms) INSERT INTO "users" ("created_at", "email", "name", "updated_at") VALUES (?, ?, ?, ?) [["created_at", Thu, 15 Sep 2011 20:34:09 UTC +00:00], ["email", "another@example.org"], ["name", "A Nother"], ["updated_at", Thu, 15 Sep 2011 20:34:09 UTC +00:00]]
(0.1ms) RELEASE SAVEPOINT active_record_1
=> #<User id: 1, name: "A Nother", email: "another@example.org", created_at: "2011-09-15 20:34:09", updated_at: "2011-09-15 20:34:09">
ruby-1.9.2-p290 :002 > user.destroy
(0.1ms) SAVEPOINT active_record_1
SQL (0.3ms) DELETE FROM "users" WHERE "users"."id" = ? [["id", 1]]
(0.1ms) RELEASE SAVEPOINT active_record_1
=> #<User id: 1, name: "A Nother", email: "another@example.org", created_at: "2011-09-15 20:34:09", updated_at: "2011-09-15 20:34:09">
ruby-1.9.2-p290 :003 >
以下是我 config/environments/development.rb 文件中的设置：
Sample::Application.configure do
# Settings specified here will take precedence over those in config/application.rb
# In the development environment your application's code is reloaded on
# every request. This slows down response time but is perfect for development
# since you don't have to restart the web server when you make code changes.
config.cache_classes = false
# Log error messages when you accidentally call methods on nil.
config.whiny_nils = true
# Show full error reports and disable caching
config.consider_all_requests_local = true
config.action_controller.perform_caching = false
# Don't care if the mailer can't send
config.action_mailer.raise_delivery_errors = false
# Print deprecation notices to the Rails logger
config.active_support.deprecation = :log
# Only use best-standards-support built into browsers
config.action_dispatch.best_standards_support = :builtin
# Do not compress assets
config.assets.compress = false
# Expands the lines which load the assets
config.assets.debug = true
#Ensure that log level is set to capture ALL messages (from Stack Overflow)
config.log_level = :debug
end
最后这是 development.log 的输出结果：
Larson-2:sample larson$ tail -f log/development.log
(0.1ms) SELECT "schema_migrations"."version" FROM "schema_migrations"
(0.0ms) PRAGMA index_list("users")
(0.1ms) SELECT "schema_migrations"."version" FROM "schema_migrations"
(0.2ms) select sqlite_version(*)
(1.8ms) CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "name" varchar(255), "email" varchar(255), "created_at" datetime, "updated_at" datetime)
(1.1ms) CREATE TABLE "schema_migrations" ("version" varchar(255) NOT NULL)
(0.0ms) PRAGMA index_list("schema_migrations")
(1.6ms) CREATE UNIQUE INDEX "unique_schema_migrations" ON "schema_migrations" ("version")
(0.1ms) SELECT version FROM "schema_migrations"
(1.0ms) INSERT INTO "schema_migrations" (version) VALUES ('20110915130358')