Rework of milestones

app/models/milestone.rb

@@ -19,12 +19,19 @@ class Milestone < ActiveRecord::Base
   has_many :issues
   has_many :merge_requests
 
+  scope :active, where(closed: false)
+  scope :closed, where(closed: true)
+
   validates :title, presence: true
   validates :project, presence: true
   validates :closed, inclusion: { in: [true, false] }
 
-  def self.active
-    where("due_date > ? OR due_date IS NULL", Date.today)
+  def expired?
+    if due_date
+      due_date < Date.today
+    else
+      false
+    end
   end
 
   def participants
@@ -52,4 +59,12 @@ class Milestone < ActiveRecord::Base
   def expires_at
     "expires at #{due_date.stamp("Aug 21, 2011")}" if due_date
   end
+
+  def can_be_closed?
+    issues.count > 0 && open? && issues.opened.count.zero?
+  end
+
+  def open?
+    !closed
+  end
 end

app/models/snippet.rb

@@ -22,7 +22,7 @@ class Snippet < ActiveRecord::Base
   belongs_to :author, class_name: "User"
   has_many :notes, as: :noteable, dependent: :destroy
 
-  delegate :name, :email, to: :author, prefix: true
+  delegate :name, :email, to: :author, prefix: true, allow_nil: true
 
   validates :author, presence: true
   validates :project, presence: true