Redmine 3.4.4

db/migrate/078_add_custom_fields_position.rb

@@ -0,0 +1,15 @@
+class AddCustomFieldsPosition < ActiveRecord::Migration
+  def self.up
+    add_column(:custom_fields, :position, :integer, :default => 1)
+    CustomField.all.group_by(&:type).each  do |t, fields|
+      fields.each_with_index do |field, i|
+        # do not call model callbacks
+        CustomField.where({:id => field.id}).update_all(:position => (i+1))
+      end
+    end
+  end
+
+  def self.down
+    remove_column :custom_fields, :position
+  end
+end