如何加载不直接继承自 Rails 5 中的 Rails 验证器 class 的自定义验证器？
How can I load a custom validator which does not directly inherit from a Rails validator class in Rails 5?
我正在为我一直从事的 Rails 5 项目编写一些自定义验证程序。例如：
class EmailValidator < ActiveModel::EachValidator
def validate_each(record, attribute, value)
if value.present? && !/\A[^\p{Z}]+@[^\p{Z}]+\.[^\p{Z}]+\z/.match?(value)
record.errors.add(attribute, "must be an email")
end
end
end
这种方法效果很好，但我的许多自定义验证器都在类似地检查正则表达式匹配，所以我决定创建一个抽象 RegexValidator class:
class RegexValidator < ActiveModel::EachValidator
self.abstract_class = true
def regex
raise "Children of this class must implement the 'regex' method."
end
def message(record, attribute, value)
raise "Children of this class must implement the 'message(record, attribute, value)' method."
end
def validate_each(record, attribute, value)
if value.present? && !regex.match?(value)
record.errors.add(attribute, message(record, attribute, value))
end
end
end
所以现在 EmailValidator 是这样实现的：
class EmailValidator < RegexValidator
def regex
/\A[^\p{Z}]+@[^\p{Z}]+\.[^\p{Z}]+\z/
end
def message(record, attribute, value)
"must be an email"
end
end
但是，由于此更改 Rails 5 不再自动加载我的 EmailValidator，即使 RegexValidator 和 EmailValidator 都放在适当命名的文件中，regex_validator.rb 和 email_validator.rb，在之前自动加载的 app/validators 文件夹中（这使得这个问题不同于 similar question）。我怀疑这是因为 EmailValidator 不再直接继承自 ActiveModel::EachValidator，但这应该无关紧要。
供参考，我尝试生成迁移文件时出现以下错误：
/var/lib/gems/2.5.0/gems/activemodel-5.2.2/lib/active_model/validations/validates.rb:121:in `rescue in block in validates': Unknown validator: 'EmailValidator' (ArgumentError)
from /var/lib/gems/2.5.0/gems/activemodel-5.2.2/lib/active_model/validations/validates.rb:118:in `block in validates'
from /var/lib/gems/2.5.0/gems/activemodel-5.2.2/lib/active_model/validations/validates.rb:114:in `each'
from /var/lib/gems/2.5.0/gems/activemodel-5.2.2/lib/active_model/validations/validates.rb:114:in `validates'
from /home/tomeraberbach/Desktop/msf/src/app/models/user.rb:7:in `<class:User>'
from /home/tomeraberbach/Desktop/msf/src/app/models/user.rb:4:in `<main>'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:50:in `load'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:50:in `load'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:476:in `block in load_file'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:661:in `new_constants_in'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:475:in `load_file'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:373:in `block in require_or_load'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:37:in `block in load_interlock'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies/interlock.rb:14:in `block in loading'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/concurrency/share_lock.rb:151:in `exclusive'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies/interlock.rb:13:in `loading'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:37:in `load_interlock'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:356:in `require_or_load'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:46:in `block in require_or_load'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:16:in `allow_bootsnap_retry'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:45:in `require_or_load'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:510:in `load_missing_constant'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:58:in `block in load_missing_constant'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:16:in `allow_bootsnap_retry'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:57:in `load_missing_constant'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:195:in `const_missing'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/inflector/methods.rb:283:in `const_get'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/inflector/methods.rb:283:in `block in constantize'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/inflector/methods.rb:281:in `each'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/inflector/methods.rb:281:in `inject'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/inflector/methods.rb:281:in `constantize'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:582:in `get'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:613:in `constantize'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise.rb:316:in `get'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/mapping.rb:83:in `to'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/mapping.rb:78:in `modules'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/mapping.rb:95:in `routes'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/mapping.rb:162:in `default_used_route'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/mapping.rb:72:in `initialize'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise.rb:346:in `new'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise.rb:346:in `add_mapping'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/rails/routes.rb:243:in `block in devise_for'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/rails/routes.rb:242:in `each'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/rails/routes.rb:242:in `devise_for'
from /home/tomeraberbach/Desktop/msf/src/config/routes.rb:3:in `block (2 levels) in <main>'
from /var/lib/gems/2.5.0/gems/actionpack-5.2.2/lib/action_dispatch/routing/mapper.rb:879:in `scope'
from /home/tomeraberbach/Desktop/msf/src/config/routes.rb:2:in `block in <main>'
from /var/lib/gems/2.5.0/gems/actionpack-5.2.2/lib/action_dispatch/routing/route_set.rb:432:in `instance_exec'
from /var/lib/gems/2.5.0/gems/actionpack-5.2.2/lib/action_dispatch/routing/route_set.rb:432:in `eval_block'
from /var/lib/gems/2.5.0/gems/actionpack-5.2.2/lib/action_dispatch/routing/route_set.rb:414:in `draw'
from /home/tomeraberbach/Desktop/msf/src/config/routes.rb:1:in `<main>'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:50:in `load'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:50:in `load'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:285:in `block in load'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:257:in `load_dependency'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:285:in `load'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/routes_reloader.rb:41:in `block in load_paths'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/routes_reloader.rb:41:in `each'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/routes_reloader.rb:41:in `load_paths'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/routes_reloader.rb:20:in `reload!'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/routes_reloader.rb:30:in `block in updater'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/file_update_checker.rb:83:in `execute'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/routes_reloader.rb:10:in `execute'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/finisher.rb:130:in `block in <module:Finisher>'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:32:in `instance_exec'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:32:in `run'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:61:in `block in run_initializers'
from /usr/lib/ruby/2.5.0/tsort.rb:228:in `block in tsort_each'
from /usr/lib/ruby/2.5.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
from /usr/lib/ruby/2.5.0/tsort.rb:431:in `each_strongly_connected_component_from'
from /usr/lib/ruby/2.5.0/tsort.rb:349:in `block in each_strongly_connected_component'
from /usr/lib/ruby/2.5.0/tsort.rb:347:in `each'
from /usr/lib/ruby/2.5.0/tsort.rb:347:in `call'
from /usr/lib/ruby/2.5.0/tsort.rb:347:in `each_strongly_connected_component'
from /usr/lib/ruby/2.5.0/tsort.rb:226:in `tsort_each'
from /usr/lib/ruby/2.5.0/tsort.rb:205:in `tsort_each'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:60:in `run_initializers'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application.rb:361:in `initialize!'
from /home/tomeraberbach/Desktop/msf/src/config/environment.rb:5:in `<main>'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `block in require_with_bootsnap_lfi'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/loaded_features_index.rb:65:in `register'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:20:in `require_with_bootsnap_lfi'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:29:in `require'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `block in require'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:257:in `load_dependency'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `require'
from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/application.rb:102:in `preload'
from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/application.rb:153:in `serve'
from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/application.rb:141:in `block in run'
from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/application.rb:135:in `loop'
from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/application.rb:135:in `run'
from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/application/boot.rb:19:in `<top (required)>'
from /usr/local/lib/site_ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
from /usr/local/lib/site_ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
from -e:1:in `<main>'
我的Userclass:
##
# A class representing a user account for this web application
# Instances of this class represent rows in the +users+ table on the database.
class User < ApplicationRecord
# Validation
validates_presence_of :email, :encrypted_password
validates :email, email: true
# Associations
devise :database_authenticatable, :registerable, :recoverable,
:rememberable, :trackable, :validatable
has_and_belongs_to_many :roles
# Events
before_validation do
# Removes unnecessary whitespace
self.email = email.strip
end
end
有什么想法吗？
我想通了。 RegexValidator 中的 self.abstract_class = true 行悄悄地引发错误，因为 class 中没有 self.abstract_class 方法。我以为是因为我在ApplicationRecordclass中看到了，但我现在意识到这是在ActiveRecord::Baseclass.
中定义的
我通过将 require_relative "../validators/email_validator" 添加到 user.rb 文件的顶部来确定这一点。这样做之后，我能够看到之前没有提示的错误：
/home/tomeraberbach/Desktop/msf/src/app/validators/regex_validator.rb:4:in `<class:RegexValidator>': undefined method `abstract_class=' for RegexValidator:Class (NoMethodError)
去掉self.abstract_class = true行和require_relative "../validators/email_validator"行后问题解决
我正在为我一直从事的 Rails 5 项目编写一些自定义验证程序。例如：
class EmailValidator < ActiveModel::EachValidator
def validate_each(record, attribute, value)
if value.present? && !/\A[^\p{Z}]+@[^\p{Z}]+\.[^\p{Z}]+\z/.match?(value)
record.errors.add(attribute, "must be an email")
end
end
end
这种方法效果很好，但我的许多自定义验证器都在类似地检查正则表达式匹配，所以我决定创建一个抽象 RegexValidator class:
class RegexValidator < ActiveModel::EachValidator
self.abstract_class = true
def regex
raise "Children of this class must implement the 'regex' method."
end
def message(record, attribute, value)
raise "Children of this class must implement the 'message(record, attribute, value)' method."
end
def validate_each(record, attribute, value)
if value.present? && !regex.match?(value)
record.errors.add(attribute, message(record, attribute, value))
end
end
end
所以现在 EmailValidator 是这样实现的：
class EmailValidator < RegexValidator
def regex
/\A[^\p{Z}]+@[^\p{Z}]+\.[^\p{Z}]+\z/
end
def message(record, attribute, value)
"must be an email"
end
end
但是，由于此更改 Rails 5 不再自动加载我的 EmailValidator，即使 RegexValidator 和 EmailValidator 都放在适当命名的文件中，regex_validator.rb 和 email_validator.rb，在之前自动加载的 app/validators 文件夹中（这使得这个问题不同于 similar question）。我怀疑这是因为 EmailValidator 不再直接继承自 ActiveModel::EachValidator，但这应该无关紧要。
供参考，我尝试生成迁移文件时出现以下错误：
/var/lib/gems/2.5.0/gems/activemodel-5.2.2/lib/active_model/validations/validates.rb:121:in `rescue in block in validates': Unknown validator: 'EmailValidator' (ArgumentError)
from /var/lib/gems/2.5.0/gems/activemodel-5.2.2/lib/active_model/validations/validates.rb:118:in `block in validates'
from /var/lib/gems/2.5.0/gems/activemodel-5.2.2/lib/active_model/validations/validates.rb:114:in `each'
from /var/lib/gems/2.5.0/gems/activemodel-5.2.2/lib/active_model/validations/validates.rb:114:in `validates'
from /home/tomeraberbach/Desktop/msf/src/app/models/user.rb:7:in `<class:User>'
from /home/tomeraberbach/Desktop/msf/src/app/models/user.rb:4:in `<main>'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:50:in `load'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:50:in `load'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:476:in `block in load_file'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:661:in `new_constants_in'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:475:in `load_file'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:373:in `block in require_or_load'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:37:in `block in load_interlock'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies/interlock.rb:14:in `block in loading'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/concurrency/share_lock.rb:151:in `exclusive'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies/interlock.rb:13:in `loading'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:37:in `load_interlock'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:356:in `require_or_load'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:46:in `block in require_or_load'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:16:in `allow_bootsnap_retry'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:45:in `require_or_load'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:510:in `load_missing_constant'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:58:in `block in load_missing_constant'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:16:in `allow_bootsnap_retry'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:57:in `load_missing_constant'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:195:in `const_missing'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/inflector/methods.rb:283:in `const_get'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/inflector/methods.rb:283:in `block in constantize'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/inflector/methods.rb:281:in `each'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/inflector/methods.rb:281:in `inject'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/inflector/methods.rb:281:in `constantize'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:582:in `get'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:613:in `constantize'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise.rb:316:in `get'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/mapping.rb:83:in `to'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/mapping.rb:78:in `modules'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/mapping.rb:95:in `routes'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/mapping.rb:162:in `default_used_route'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/mapping.rb:72:in `initialize'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise.rb:346:in `new'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise.rb:346:in `add_mapping'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/rails/routes.rb:243:in `block in devise_for'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/rails/routes.rb:242:in `each'
from /var/lib/gems/2.5.0/gems/devise-4.5.0/lib/devise/rails/routes.rb:242:in `devise_for'
from /home/tomeraberbach/Desktop/msf/src/config/routes.rb:3:in `block (2 levels) in <main>'
from /var/lib/gems/2.5.0/gems/actionpack-5.2.2/lib/action_dispatch/routing/mapper.rb:879:in `scope'
from /home/tomeraberbach/Desktop/msf/src/config/routes.rb:2:in `block in <main>'
from /var/lib/gems/2.5.0/gems/actionpack-5.2.2/lib/action_dispatch/routing/route_set.rb:432:in `instance_exec'
from /var/lib/gems/2.5.0/gems/actionpack-5.2.2/lib/action_dispatch/routing/route_set.rb:432:in `eval_block'
from /var/lib/gems/2.5.0/gems/actionpack-5.2.2/lib/action_dispatch/routing/route_set.rb:414:in `draw'
from /home/tomeraberbach/Desktop/msf/src/config/routes.rb:1:in `<main>'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:50:in `load'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:50:in `load'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:285:in `block in load'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:257:in `load_dependency'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:285:in `load'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/routes_reloader.rb:41:in `block in load_paths'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/routes_reloader.rb:41:in `each'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/routes_reloader.rb:41:in `load_paths'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/routes_reloader.rb:20:in `reload!'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/routes_reloader.rb:30:in `block in updater'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/file_update_checker.rb:83:in `execute'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/routes_reloader.rb:10:in `execute'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application/finisher.rb:130:in `block in <module:Finisher>'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:32:in `instance_exec'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:32:in `run'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:61:in `block in run_initializers'
from /usr/lib/ruby/2.5.0/tsort.rb:228:in `block in tsort_each'
from /usr/lib/ruby/2.5.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
from /usr/lib/ruby/2.5.0/tsort.rb:431:in `each_strongly_connected_component_from'
from /usr/lib/ruby/2.5.0/tsort.rb:349:in `block in each_strongly_connected_component'
from /usr/lib/ruby/2.5.0/tsort.rb:347:in `each'
from /usr/lib/ruby/2.5.0/tsort.rb:347:in `call'
from /usr/lib/ruby/2.5.0/tsort.rb:347:in `each_strongly_connected_component'
from /usr/lib/ruby/2.5.0/tsort.rb:226:in `tsort_each'
from /usr/lib/ruby/2.5.0/tsort.rb:205:in `tsort_each'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:60:in `run_initializers'
from /var/lib/gems/2.5.0/gems/railties-5.2.2/lib/rails/application.rb:361:in `initialize!'
from /home/tomeraberbach/Desktop/msf/src/config/environment.rb:5:in `<main>'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `block in require_with_bootsnap_lfi'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/loaded_features_index.rb:65:in `register'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:20:in `require_with_bootsnap_lfi'
from /var/lib/gems/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:29:in `require'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `block in require'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:257:in `load_dependency'
from /var/lib/gems/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `require'
from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/application.rb:102:in `preload'
from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/application.rb:153:in `serve'
from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/application.rb:141:in `block in run'
from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/application.rb:135:in `loop'
from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/application.rb:135:in `run'
from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/application/boot.rb:19:in `<top (required)>'
from /usr/local/lib/site_ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
from /usr/local/lib/site_ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
from -e:1:in `<main>'
我的Userclass:
##
# A class representing a user account for this web application
# Instances of this class represent rows in the +users+ table on the database.
class User < ApplicationRecord
# Validation
validates_presence_of :email, :encrypted_password
validates :email, email: true
# Associations
devise :database_authenticatable, :registerable, :recoverable,
:rememberable, :trackable, :validatable
has_and_belongs_to_many :roles
# Events
before_validation do
# Removes unnecessary whitespace
self.email = email.strip
end
end
有什么想法吗？
我想通了。 RegexValidator 中的 self.abstract_class = true 行悄悄地引发错误，因为 class 中没有 self.abstract_class 方法。我以为是因为我在ApplicationRecordclass中看到了，但我现在意识到这是在ActiveRecord::Baseclass.
我通过将 require_relative "../validators/email_validator" 添加到 user.rb 文件的顶部来确定这一点。这样做之后，我能够看到之前没有提示的错误：
/home/tomeraberbach/Desktop/msf/src/app/validators/regex_validator.rb:4:in `<class:RegexValidator>': undefined method `abstract_class=' for RegexValidator:Class (NoMethodError)
去掉self.abstract_class = true行和require_relative "../validators/email_validator"行后问题解决