Rails＆Rspec：使用通过扩展ActiveSupport :: Concern的模块定义的方法测试模型

Question

I have a module that defines a class method to dynamically define a series of instance methods based on values in given columns, roughly as follows:

lib/active_record_extension.rb

module ActiveRecordExtension
  extend ActiveSupport::Concern

  module ClassMethods
    def define_some_methods(*attribute_names)
      # define some methods
    end
  end
end

ActiveRecord::Base.send(:include, ActiveRecordExtension)

config/initializers/extensions.rb

require 'active_record_extension.rb'

app/models/my_model.rb

class MyModel < ActiveRecord::Base
  define_some_methods :first_attribute, :second_attribute
end

This setup for adding a class method to ActiveRecord::Base is based on the first answer to this question .

This works beautifully in my Rails app and console, allowing me to define a variety of similar methods without cluttering up my model. However, it doesn't work at all in my rspec tests, which now all fail with NoMethodError s for calls to the dynamically defined methods.

How can I be sure this module (or just this method) is correctly included in my models while running rspec?

EDIT: Here is my spec/spec_helper.rb :

ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'rspec/autorun'

#to test with sunspot
require 'sunspot/rails/spec_helper'
RSpec.configure do |config|
  ::Sunspot.session = ::Sunspot::Rails::StubSessionProxy.new(::Sunspot.session)
end

#adds devise and jasmine fixture test helpers
Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}

RSpec.configure do |config|
  config.fixture_path = "#{::Rails.root}/spec/fixtures"
  config.use_transactional_fixtures = true
  config.infer_base_class_for_anonymous_controllers = false
  config.order = "random"
end

Answer 1

I would propose an alternative way to solve the first problem which should also solve the current issue you're asking about. There's nothing ActiveSupport::Concern can do for you here that ruby can't so I would just stick with pure ruby and do:

module ActiveRecordExtension
  def self.included(klass)
    klass.class_eval do 
      extend ClassMethods
    end
  end 
 module ClassMethods
  def define_some_methods(*attribute_names)
   # define some methods
  end
 end
end

ActiveRecord::Base.send(:include, ActiveRecordExtension)

If you have any questions about the included hook I can explain in more detail. You also don't need to require this file in an initializer(although when you make changes you will need to restart your local server)