issue relations import

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@163 e93f8b46-1217-0410-a6f0-8f06a7374b81

issue_relations/app/models/issue_relation.rb

@@ -0,0 +1,19 @@
+class IssueRelation < ActiveRecord::Base
+  belongs_to :issue
+  belongs_to :issue_to, :class_name => 'Issue', :foreign_key => 'issue_to_id'
+  
+  TYPES = { "ES" => { :name => :label_rel_end_to_start, :order => 1 },
+            "EE" => { :name => :label_rel_end_to_end, :order => 2 },
+            "SS" => { :name => :label_rel_start_to_start, :order => 3 },
+            "SE" => { :name => :label_rel_start_to_end, :order => 4 }
+  }.freeze
+
+  validates_presence_of :issue, :issue_to, :relation_type, :delay
+  validates_inclusion_of :relation_type, :in => TYPES.keys
+  validates_numericality_of :delay, :allow_nil => true
+  
+  def validate
+    errors.add :issue_to_id, :activerecord_error_invalid if issue_id == issue_to_id
+  end
+  
+end