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barleysodas/app/models/beer.rb

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##
# This model will represent a beverage produced by a Brewery.
#
class Beer < ActiveRecord::Base
belongs_to :brewery
has_one :page, :foreign_key => 'owner_id', :dependent => :destroy,
:conditions => "pages.owner_type = 'Beer'"
before_save :ensure_page_valid
after_save :save_page
##
# Returns a list of attributes for the Page partial.
#
def page_attributes
pattr = []
pattr << "ABV: #{"%.1f" % abv}%" unless abv.to_s.empty?
unless original_gravity.to_s.empty?
pattr << "Original Gravity: #{original_gravity}"
end
unless final_gravity.to_s.empty?
pattr << "Final Gravity: #{final_gravity}"
end
pattr
end
protected
##
# This model always has a Page associated. Save it before this model to make
# sure that everything is kosher with the name and whatnot.
#
def save_page
page.save
end
##
# This will let the Page model keep track of names being unique and all.
# Might be nil, so let the after_save hook create it.
#
def ensure_page_valid
if page.nil?
self.errors.add(:page, "is missing")
else
page.owner = self
page.title = self.title
page.errors.each do |key, val|
self.errors.add(key, val)
end if !page.valid?
end
return false if self.errors.size > 0
true
end
end