app/models/adminpanel/gallery.rb in adminpanel-0.1.0 vs app/models/adminpanel/gallery.rb in adminpanel-0.1.1

@@ -4,7 +4,58 @@
 	class Gallery < ActiveRecord::Base
 	  attr_accessible :file
 
 	  mount_uploader :file, Adminpanel::GalleryUploader
 	  validates_presence_of :file
+	  before_create :set_position
+	  before_destroy :rearrange_positions
+
+
+	  default_scope { order("position ASC")}
+
+
+	  def move_to_better_position
+	  	if position > 1
+		  	conflicting_gallery = Gallery.find_by_position(position - 1)
+		  	update_attribute(:position, position - 1)
+		  	conflicting_gallery.update_attribute(
+		  		:position, conflicting_gallery.position + 1
+		  		)
+		  	true
+	  	else
+	  		false
+	  	end
+	  end
+
+	  def move_to_worst_position
+	  	records = Gallery.count
+	  	if position < records
+		  	conflicting_gallery = Gallery.find_by_position(position + 1)
+		  	update_attribute(:position, position + 1)
+		  	conflicting_gallery.update_attribute(
+		  		:position, conflicting_gallery.position - 1
+		  		)
+		  	true
+	  	else
+	  		false
+	  	end
+	  end
+
+  	private
+  		def rearrange_positions
+  			unarranged_galleries = Gallery.where("position > ?", position)
+  			unarranged_galleries.each do |gallery|
+  				gallery.update_attribute(:position, gallery.position - 1)
+  			end
+
+  		end
+		
+		def set_position
+		  	last_record = Gallery.last
+		  	if last_record.nil?
+		  		self.position = 1
+		  	else
+		  		self.position = last_record.position + 1
+		  	end
+		end
 	end
 end
\ No newline at end of file