missing model

git-svn-id: http://svn.barleysodas.com/barleysodas/trunk@27 0f7b21a7-9e3a-4941-bbeb-ce5c7c368fa7

app/models/beer.rb

@@ -0,0 +1,38 @@
+##
+# 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
+  
+  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