我的rails应用程序有问题.从Rails 3到4更新之后.
当我在开发模式下启动服务器后浏览页面时,一切都很好.
当我在开发模式下启动服务器后浏览页面时,一切都很好.
但是在单个代码更改(甚至添加空格)之后,每个页面请求都会显示以下错误.
Unable to autoload constant User,expected
/path/to/my/rails-app/app/models/user.rb to define it
该文件完全存在于那里并定义了类：
class User < ActiveRecord::Base …
我在application.rb中用config.autoload_paths和config.eager_load_paths尝试了很多东西,但没有运气.
停用弹簧也没有帮助.
开发应用程序并在每次更改后必须重新启动服务器才能显示90秒.
$rails -v Rails 4.2.4 $ruby -v ruby 2.1.7p400 (2015-08-18 revision 51632) [x86_64-linux]
一些相关的配置：
development.rb
MyApp::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 webserver when you make code changes.
config.cache_classes = false
# Do not eager load code on boot. This avoids loading your whole application
# just for the purpose of running a single test. If you are using a tool that
# preloads Rails for running tests,you may have to set it to true.
config.eager_load = false
# 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
config.action_mailer.delivery_method = :test
config.action_mailer.default_url_options = {
host: 'localhost',port: 3000
}
end
application.rb中
module Serviceportal
class Application < Rails::Application
# Enable the asset pipeline
config.assets.enabled = true
# Version of your assets,change this if you want to expire all your assets
config.assets.version = '1.0'
[… some asset precompile stuff …]
# Configure the default encoding used in templates for Ruby 1.9.
config.encoding = 'utf-8'
# Custom directories with classes and modules you want to be autoloadable.
config.autoload_paths += Dir["#{config.root}/app/mailers","#{config.root}/app/controllers/concerns","#{config.root}/app/models/concerns","#{config.root}/app/decorators/concerns","#{config.root}/lib","#{config.root}/lib/shared"
]
config.eager_load_paths += Dir["#{config.root}/app/mailers","#{config.root}/lib/shared"]
# Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
# Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
config.time_zone = 'Berlin'
# The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
# config.i18n.load_path += Dir[Rails.root.join('my','locales','*.{rb,yml}').to_s]
config.i18n.default_locale = :de
[… some sql and active support stuff …]
config.action_controller.include_all_helpers = false
config.action_controller.action_on_unpermitted_parameters = :raise
# Do not swallow errors in after_commit/after_rollback callbacks.
config.active_record.raise_in_transactional_callbacks = true
end
end
编辑：错误主要出现在以下函数的lib / auth / user_proxy.rb中.也许这有助于缩小可能原因的范围.
def self.usertype_allowed?(type) [ User,TempCustomer ].include? type.classify.safe_constantize rescue false end
编辑2：将编辑1中的类名称字符串化(感谢@Benjamin Sinclaire).但只会导致下一个错误.我也可以避免使用类.但是在app / controllers / concerns / security.rb中出现以下错误时,没有什么可以改变？
Unable to autoload constant User,expected
/path/to/my/rails-app/app/models/user.rb to define it
码：
def set_current_user User.current = current_user end
当前用户保存在线程中(代码来自/path/to/my/rails-app/app/models/user.rb
def self.current Thread.current['current_user'] end def self.current=(user) Thread.current['current_user'] = user end
只是再次说清楚：它在服务器重新开发之后工作,直到我在某处更改某些代码.
解决方法
1查看您是否在一行中完成了任何多级类或模块声明,并将它们更改为在多行中声明.
代替
class Parent::Sub::Child end
做
module Parent
module Sub
class Child
end
end
end
2检查模型关联定义,确保永远不会使用常量.请改用字符串.
代替
belongs_to :manager,class_name: User
做
belongs_to :manager,class_name: 'User'
3刚看到你的编辑.你能这样重构吗？
# I assume `type` is a string or such,so we can compare classes # names instead of constants,and get rid of `safe_constantize` def self.usertype_allowed?(type) ['User','TempCustomer'].include? type.classify rescue false end
4在Thread存储中序列化活动记录对象不是一个好主意.将其更改为存储用户ID,如下所示：
def set_current_user User.current = current_user.id end def self.current Thread.current['current_user_id'] end def self.current=(user_id) Thread.current['current_user_id'] = user_id end