upgrade pat3

app/models/section.rb

@@ -4,7 +4,7 @@ class Section
   include ActiveModel::SerializerSupport
 
   property :title
-  property :path, type: Array, default: [[0.0, 0.0], [20.0, 30.0]] # default width 20m height 30m
+  property :path, type: Array, default: [[0.0, 0.0], [20.0, 0.0], [20.0, 30.0], [0.0, 30.0]] # default width 20m height 30m
 
   belongs_to :supplier
   has_many :tables
@@ -34,20 +34,25 @@ class Section
     @active_orders ||= Order.active_for_supplier_and_section(supplier_id, id)
   end
 
-
   def width
-    self.path.last.try(:first).to_f - self.path.first.try(:first).to_f
+    x_coords = path.map(&:first)
+    x_coords.max - x_coords.min
   end
-  def height 
-    self.path.last.try(:last).to_f - self.path.first.try(:last).to_f
+
+  def height
+    y_coords = path.map(&:last)
+    y_coords.max - y_coords.min
   end
 
   def width=(val)
     val = val.to_f
     self.path[0] ||= [0.0, 0.0]
     self.path[1] ||= [0.0, 0.0]
-    unless path[1][0] == val
+    self.path[2] ||= [0.0, 0.0]
+    self.path[3] ||= [0.0, 0.0]
+    unless path[1][0] == val && path[2][0] == val
       self.path[1][0] = val
+      self.path[2][0] = val
       path_will_change!
     end
   end
@@ -56,8 +61,11 @@ class Section
     val = val.to_f
     self.path[0] ||= [0.0, 0.0]
     self.path[1] ||= [0.0, 0.0]
-    unless path[1][1] == val
-      self.path[1][1] = val 
+    self.path[2] ||= [0.0, 0.0]
+    self.path[3] ||= [0.0, 0.0]
+    unless path[2][1] == val && path[3][1] == val
+      self.path[2][1] = val
+      self.path[3][1] = val
       path_will_change!
     end
   end