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Order-refactoring part II.

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This commit is contained in:
Benjamin Meichsner 2009-02-03 21:14:48 +01:00
parent f7b9582261
commit 6fd5d825f9
27 changed files with 228 additions and 231 deletions
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27
app/models/article.rb
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@ -76,34 +76,9 @@ class Article < ActiveRecord::Base
updated_at > 2.days.ago
end
# Returns how many units of this article need to be ordered given the specified order quantity and tolerance.
# This is determined by calculating how many units can be ordered from the given order quantity, using
# the tolerance to order an additional unit if the order quantity is not quiet sufficient.
# There must always be at least one item in a unit that is an ordered quantity (no units are ever entirely
# filled by tolerance items only).
#
# Example:
#
# unit_quantity | quantity | tolerance | calculate_order_quantity
# --------------+----------+-----------+-----------------------
# 4 | 0 | 2 | 0
# 4 | 0 | 5 | 0
# 4 | 2 | 2 | 1
# 4 | 4 | 2 | 1
# 4 | 4 | 4 | 1
# 4 | 5 | 3 | 2
# 4 | 5 | 4 | 2
#
def calculate_order_quantity(quantity, tolerance = 0)
unit_size = unit_quantity
units = quantity / unit_size
remainder = quantity % unit_size
units += ((remainder > 0) && (remainder + tolerance >= unit_size) ? 1 : 0)
end
# If the article is used in an open Order, the Order will be returned.
def in_open_order
order_articles = OrderArticle.all(:conditions => ['order_id IN (?)', Order.open.collect {|o| o.id }])
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