Question

我最近一直在研究Rails，出于测试目的，我需要从默认的WEBrick服务器切换到支持多线程的服务器。我选择使用Puma，它可以通过gem和development.rb文件中的一行轻松配置。

Development.rb：

# 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

# Raise exception on mass assignment protection for Active Record models
config.active_record.mass_assignment_sanitizer = :strict

# Log the query plan for queries taking more than this (works
# with SQLite, MySQL, and PostgreSQL)
config.active_record.auto_explain_threshold_in_seconds = 0.5

# Do not compress assets
config.assets.compress = false

# Expands the lines which load the assets
config.assets.debug = true

config.threadsafe!

我需要添加的唯一一行是最终的“config.threadsafe！”这里参考的是Gemfile。

的Gemfile：

source 'https://rubygems.org'

gem 'rails', '3.2.11'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

gem 'sqlite3'
gem 'mysql2'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  gem 'therubyracer', :platforms => :ruby

  gem 'uglifier', '>= 1.0.3'
end

group :development do
  gem "better_errors"
  gem "binding_of_caller"   
  gem 'puma'
end

gem 'jquery-rails'
gem 'devise'

gem 'paperclip'
gem 'cocaine', '= 0.3.2' 
gem 'streamio-ffmpeg'

gem 'cancan'
gem 'formtastic'

gem 'jbuilder'

# Deploy with Capistrano
gem 'capistrano'
gem 'rvm-capistrano'

# To use debugger
#gem 'debugger'

gem 'jquery-validation-rails'

这最终满足了我需要它的目的，并且应用程序正常运行。问题是，每当我对任何东西（JS，CSS，控制器，视图等）进行更改时，更改都不会显示，直到我重新启动服务器。

任何人都可以解释为什么会这样吗？更重要的是，我该怎么做才能更改它，以便不需要重新启动服务器才能显示更改？

Answer 1

通过将config.threadsafe!添加到您的development.rb文件，您将禁用自动代码重新加载。请参阅实施here：

  # Enable threaded mode. Allows concurrent requests to controller actions and
  # multiple database connections. Also disables automatic dependency loading
  # after boot, and disables reloading code on every request, as these are
  # fundamentally incompatible with thread safety.
  def threadsafe!
    self.preload_frameworks = true
    self.cache_classes = true
    self.dependency_loading = false
    self.allow_concurrency = true
    self
  end

您应该从development.rb中删除config.threadsafe!。

Rails应用程序不在开发中重新加载代码

1 个答案: