app/models/article.rb
# encoding: utf-8
class Article < ActiveRecord::Base
# Replace numeric seperator with database format
localize_input_of :price, :tax, :deposit
# Get rid of unwanted whitespace. {Unit#new} may even bork on whitespace.
normalize_attributes :name, :unit, :note, :manufacturer, :origin, :order_number
# Associations
belongs_to :supplier
belongs_to :article_category
has_many :article_prices, :order => "created_at DESC"
scope :undeleted, -> { where(deleted_at: nil) }
scope :available, -> { undeleted.where(availability: true) }
scope :not_in_stock, :conditions => {:type => nil}
# Validations
validates_presence_of :name, :unit, :price, :tax, :deposit, :unit_quantity, :supplier_id, :article_category
validates_length_of :name, :in => 4..60
validates_length_of :unit, :in => 2..15
validates_numericality_of :price, :greater_than_or_equal_to => 0
validates_numericality_of :unit_quantity, :greater_than => 0
validates_numericality_of :deposit, :tax
#validates_uniqueness_of :name, :scope => [:supplier_id, :deleted_at, :type], if: Proc.new {|a| a.supplier.shared_sync_method.blank? or a.supplier.shared_sync_method == 'import' }
#validates_uniqueness_of :name, :scope => [:supplier_id, :deleted_at, :type, :unit, :unit_quantity]
validate :uniqueness_of_name
# Callbacks
before_save :update_price_history
before_destroy :check_article_in_use
def title
"#{name} (#{unit})"
end
def tax_price
ArticlePrice.tax_price(self)
end
# The financial gross, net plus tax and deposti
def gross_price(group=nil)
ArticlePrice.gross_price(self, group)
end
# The price for the foodcoop-member.
def fc_price(group=nil)
ArticlePrice.fc_price(self, group)
end
# @return [Unit] Unit class for article unit, or +nil+ when unparsable.
# @todo check caching this value during a request doesn't give problems
def unit_unit
@unit_unit ||= (::Unit.new(self[:unit]) rescue nil)
end
# Returns true if article has been updated at least 2 days ago
def recently_updated
updated_at > 2.days.ago
end
# If the article is used in an open Order, the Order will be returned.
def in_open_order
@in_open_order ||= begin
order_articles = OrderArticle.all(:conditions => ['order_id IN (?)', Order.open.collect(&:id)])
order_article = order_articles.detect {|oa| oa.article_id == id }
order_article ? order_article.order : nil
end
end
# Returns true if the article has been ordered in the given order at least once
def ordered_in_order?(order)
order.order_articles.where(article_id: id).where('quantity > 0').one?
end
# this method checks, if the shared_article has been changed
# unequal attributes will returned in array
# if only the timestamps differ and the attributes are equal,
# false will returned and self.shared_updated_on will be updated
def shared_article_changed?(supplier = self.supplier)
# skip early if the timestamp hasn't changed
shared_article = self.shared_article(supplier)
unless shared_article.nil? or self.shared_updated_on == shared_article.updated_on
# try to convert units
# convert supplier's price and unit_quantity into fc-size
new_price, new_unit_quantity = self.convert_units
new_unit = self.unit
unless new_price and new_unit_quantity
# if convertion isn't possible, take shared_article-price/unit_quantity
new_price, new_unit_quantity, new_unit = shared_article.price, shared_article.unit_quantity, shared_article.unit
end
# check if all attributes differ
unequal_attributes = Article.compare_attributes(
{
:name => [self.name, shared_article.name],
:manufacturer => [self.manufacturer, shared_article.manufacturer.to_s],
:origin => [self.origin, shared_article.origin],
:unit => [self.unit, new_unit],
:price => [self.price.to_f.round(2), new_price.to_f.round(2)],
:tax => [self.tax, shared_article.tax],
:deposit => [self.deposit.to_f.round(2), shared_article.deposit.to_f.round(2)],
# take care of different num-objects.
:unit_quantity => [self.unit_quantity.to_s.to_f.round(1), new_unit_quantity.to_s.to_f.round(1)],
:note => [self.note.to_s, shared_article.note.to_s]
}
)
if unequal_attributes.empty?
# when attributes not changed, update timestamp of article
self.update_attribute(:shared_updated_on, shared_article.updated_on)
false
else
unequal_attributes
end
end
end
# compare attributes from different articles. used for auto-synchronization
# returns array of symbolized unequal attributes
def self.compare_attributes(attributes)
unequal_attributes = attributes.select { |name, values| values[0] != values[1] and not (values[0].blank? and values[1].blank?) }
unequal_attributes.collect { |pair| pair[0] }
end
# to get the correspondent shared article
def shared_article(supplier = self.supplier)
self.order_number.blank? and return nil
@shared_article ||= supplier.shared_supplier.shared_articles.find_by_number(self.order_number) rescue nil
end
# convert units in foodcoop-size
# uses unit factors in app_config.yml to calc the price/unit_quantity
# returns new price and unit_quantity in array, when calc is possible => [price, unit_quanity]
# returns false if units aren't foodsoft-compatible
# returns nil if units are eqal
def convert_units
if unit != shared_article.unit
# legacy, used by foodcoops in Germany
if shared_article.unit == "KI" and unit == "ST" # 'KI' means a box, with a different amount of items in it
# try to match the size out of its name, e.g. "banana 10-12 St" => 10
# unit_quantity would be an integer, but to show when it's not whole, return float instead
new_unit_quantity = /[0-9\-\s]+(St)/.match(shared_article.name).to_f.round(1)
if new_unit_quantity and new_unit_quantity > 0
new_price = (shared_article.price/new_unit_quantity.to_f).round(3)
[new_price, new_unit_quantity]
else
false
end
else # use ruby-units to convert
fc_unit = (::Unit.new(unit) rescue nil)
supplier_unit = (::Unit.new(shared_article.unit) rescue nil)
if fc_unit and supplier_unit and fc_unit =~ supplier_unit
conversion_factor = (fc_unit.convert_to(supplier_unit.units) / supplier_unit).scalar
new_price = (shared_article.price * conversion_factor).to_f.round(3)
new_unit_quantity = (shared_article.unit_quantity / conversion_factor).to_f.round(1)
[new_price, new_unit_quantity]
else
false
end
end
else
nil
end
end
def deleted?
deleted_at.present?
end
def mark_as_deleted
check_article_in_use
update_column :deleted_at, Time.now
end
# product information url, fallback to optional supplier-wide value
def info_url(supplier=self.supplier)
self[:info_url] or supplier.article_info_url(self)
end
protected
# Checks if the article is in use before it will deleted
def check_article_in_use
raise I18n.t('articles.model.error_in_use', :article => self.name.to_s) if self.in_open_order
end
# Create an ArticlePrice, when the price-attr are changed.
def update_price_history
if price_changed?
article_prices.build(
:price => price,
:tax => tax,
:deposit => deposit,
:unit_quantity => unit_quantity
)
end
end
def price_changed?
changed.detect { |attr| attr == 'price' || 'tax' || 'deposit' || 'unit_quantity' } ? true : false
end
# We used have the name unique per supplier+deleted_at+type. With the addition of shared_sync_method all,
# this came in the way, and we now allow duplicate names for the 'all' methods - expecting foodcoops to
# make their own choice among products with different units by making articles available/unavailable.
def uniqueness_of_name
matches = Article.where(name: name, supplier_id: supplier_id, deleted_at: deleted_at, type: type)
matches = matches.where('id != ?', id) unless new_record?
if supplier.shared_sync_method.blank? or supplier.shared_sync_method == 'import'
errors.add :name, :taken if matches.any?
else
errors.add :name, :taken_with_unit if matches.where(unit: unit, unit_quantity: unit_quantity).any?
end
end
end