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courses.each do |course|
  InventoryLineItem.where(course_id: course.id).update_all master_variants[course.id]
end

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Shirt:
  Color: Red, Blue, Yellow
  
Pants:
  Color: Red, Blue, Yellow
  
  
Clothes Bundle:
  Color: Red, Blue, Yellow.

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class Spree::Variant
  def course_with_fallback
    course || product.course
  end
end

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module ApplicationHelper
  def edit_create_info_link(model)
    model_name = model.class.to_s.underscore
    if model.persisted?
      link_to 'Edit', { :action => "#{model_name}_info_edit", :id => barn.url, :search_name => params[:search_name], :page => params[:page] }, id: "#{model.url}-info-edit"
    else
      link_to 'Create', { :action => "new_#{model_name}_info", :id => barn.url, :search_name => params[:search_name], :page => params[:page] }, id: "#{model.url}-info-create"
    end
  end
end

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class Login
  has_one :user
end

class User
  belongs_to :login
  delegate :first_name, :first_name=, to: :login
end

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class Product
  belongs_to :course
end

class Variant
  belongs_to :course
end

class InventoryOrder
  def process

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def task_with_lock(*args)
  lock
  task(args)
  unlock
end

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class Subscription
  
  def upgrade_to(plan, options={})
    update_attributes(subscription_plan: plan, 
                      minimum_user_amount: options.delete(:users_count))
  end
  
  def has_addons?
    addons_count > 0
  end

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module Spree
  class LineItem < ActiveRecord::Base
    has_many :adjustments, as: :adjustable, dependent: :destroy, reject_if: -> { |a| a.amount == 0 }
  end
end

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class Model
  def abc
    return 0
  end
  
  def xyz
    return 1
  end
end