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shop_discount.rb
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shop_discount.rb
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class ShopDiscount < ActiveRecord::Base
# Return all discounts which are valid
default_scope :conditions => [
'(starts_at IS NULL and finishes_at IS NULL) OR (starts_at >= :now AND finishes_at <= :now) OR (starts_at IS NULL and finishes_at <= :now)',
{ :now => Time.now }
]
belongs_to :created_by, :class_name => 'User'
belongs_to :updated_by, :class_name => 'User'
has_many :discountables, :class_name => 'ShopDiscountable', :foreign_key => :discount_id
has_many :categories, :through => :discountables, :source => :category, :conditions => "shop_discountables.discounted_type = 'ShopCategory'"
has_many :products, :through => :discountables, :source => :product, :conditions => "shop_discountables.discounted_type = 'ShopProduct'"
has_many :orders, :through => :discountables, :source => :order, :conditions => "shop_discountables.discounted_type = 'ShopOrder'"
has_many :line_items, :through => :discountables, :source => :line_item,:conditions => "shop_discountables.discounted_type = 'ShopLineItem'"
validates_presence_of :name, :code, :amount
validates_uniqueness_of :name, :code
validates_numericality_of :amount
# This will override the default scope
def self.all_including_invalid(*attrs)
with_exclusive_scope{find(:all,*attrs)}
end
# Return all categories minus its own
def available_categories
ShopCategory.all - categories
end
# Returns all products minus its own
def available_products
ShopProduct.all - products
end
end