[英]Rails - include a module without using the word include
I noticed in the audited gem you can do this:我在审核的 gem 中注意到你可以这样做:
class User < ActiveRecord::Base
# All fields
# audited
# Single field
# audited only: :name
# Multiple fields
# audited only: [:name, :address]
I'm trying to replicate this behaviour with not much luck, I'm using instructions here to extend my module: https://stackoverflow.com/a/9200191/312342我试图复制这种行为但运气不佳,我在这里使用说明来扩展我的模块: https://stackoverflow.com/a/9200191/312342
here is my class:这是我的 class:
class Thing < ApplicationRecord
audited only: :name
end
My module:我的模块:
module Audited
extend ActiveSupport::Concern
def ClassMethods
def audited(options = {})
class_attribute :audited_options
self.audited_options = options
after_save :audit
end
end
def audit
puts self.changed_attributes
puts self.audited_options
end
end
::ActiveRecord::Base.send(:include, Audited)
Error I'm getting (only on the first load, then error stops, but module still does not output.我得到的错误(仅在第一次加载时,然后错误停止,但模块仍然没有 output。
NoMethodError (undefined method `audited' for #<Class:0x00007fae51b15ab0>):
Your module is included into ActiveRecord::Base
only when the file is executed.只有在执行文件时,您的模块才会包含在
ActiveRecord::Base
中。 Assuming you're using rails autoloading, it's only executed when Audited
is called.假设您正在使用 rails 自动加载,它仅在调用
Audited
时执行。
You'll need to require the file or execute ::ActiveRecord::Base.send(:include, Audited)
somewhere in your load process (initializer).您需要在加载过程(初始化程序)的某处要求该文件或执行
::ActiveRecord::Base.send(:include, Audited)
)。
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