控制器中找不到Rails 5自定义模块功能

我有一个Rails 5应用程序和自定义模块存储在 lib/reusable.rb .

module Reusable

    def createCharge(amount, source, description, customer)

        charge_params = {
            amount: amount,
            source: source,
            description: description,
            currency: 'usd'
        }

        return charge_params
    end
end

我已将以下内容添加到 application.rb

config.autoload_paths << "#{Rails.root}/lib"
config.eager_load_paths << "#{Rails.root}/lib"

启动控制台时,我可以运行以下操作:

2.3.4 :002 > include Reusable
 => Object
2.3.4 :003 > x = Reusable.createCharge(100, 1, "ffwefwef")
{
         :amount => 100,
         :source => 1,
    :description => "ffwefwef",
       :currency => "usd"
}

但在我的控制器中,我不能做同样的事情。当我尝试以下方法时:

class ChargesController < ApplicationController
    before_action :authenticate_user!, only: [:new, :create]
    before_action :set_client, only: [:new, :create]
    before_action :set_order, only: [:create]

    include Reusable

    def create
        charge_attempt = Reusable.createCharge(total, token, description, customer)
    end
end

NoMethodError (undefined method `createCharge' for Reusable:Module):

知道它为什么找不到函数吗?我已重新启动应用程序并打印 Reusable.methods 到我的控制台,功能不在那里。