Gui improvements, ordering

app/models/element.rb

@@ -8,6 +8,8 @@ class Element < ApplicationRecord
 
   delegate :report, to: :page
 
+  after_validation :set_position
+
   # Calculate actual conformity level:
   # - if a success_criterion has result :failed -> the confirmity_level
   #   of that success_criterion is not reached.
@@ -30,4 +32,9 @@ class Element < ApplicationRecord
   def max_level
     @max_level ||= success_criteria.reject(&:not_applicable?).max(&:level)
   end
+
+  def set_position
+    Rails.logger.debug("element: position #{position}")
+    self.position ||= (page.elements.pluck(:position).max || 0) + 1
+  end
 end

app/models/page.rb

@@ -3,4 +3,11 @@ class Page < ApplicationRecord
   has_many :elements, dependent: :destroy
 
   has_rich_text :comment
+
+  before_validation :set_position
+
+  private
+  def set_position
+    self.position ||= (report.pages.pluck(:position).max || 0) + 1
+  end
 end

app/models/success_criterion.rb

@@ -14,6 +14,8 @@ class SuccessCriterion < ApplicationRecord
   enum :result, %i[passed failed not_applicable]
   enum :level, %i[A AA AAA]
 
+  before_save :set_position
+
   def level_value
     return nil unless level
 
@@ -23,4 +25,10 @@ class SuccessCriterion < ApplicationRecord
   def header
     "HEADER"
   end
+
+  private
+  def set_position
+    self.position ||= (element.success_criteria.pluck(:position).max || 0) + 1
+    Rails.logger.debug("set position: "+position.to_s)
+  end
 end