Add structured errors to schema

db/migrate/20170703075959_create_error_template_attributes.rb

@@ -0,0 +1,11 @@
+class CreateErrorTemplateAttributes < ActiveRecord::Migration
+  def change
+    create_table :error_template_attributes do |t|
+      t.belongs_to :error_template
+      t.string :key
+      t.string :regex
+
+      t.timestamps null: false
+    end
+  end
+end