Add deserialize method to CharacterSheetSection

app/models/character_sheet_section.rb

@@ -25,4 +25,22 @@ class CharacterSheetSection < ApplicationRecord
   def highest_order_index
     character_sheet_features.maximum(:order_index) || 1
   end
+
+  def self.deserialize(h)
+    section = new
+
+    h["character_sheet_subsections"].each do |sub|
+      section.character_sheet_subsections.deserialize(sub)
+    end
+
+    h["stats"].each do |stat|
+      section.stats.build(stat)
+    end
+
+    h["text_fields"].each do |text_field|
+      section.text_fields.build(text_field)
+    end
+
+    section
+  end
 end

test/services/template_builder_test.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require "test_helper"
+
+class TemplateBuilderTest < ActiveSupport::TestCase
+  test "creates template from a CharacterSheetSection" do
+    section = character_sheet_sections(:stats)
+    template = TemplateBuilder.create!(
+      name: "Test template",
+      game_system: GameSystem.last,
+      from: section,
+    )
+    template_hash = JSON.parse(template.content)
+    assert_equal 1, template_hash["character_sheet_subsections"].count
+    assert_equal 3, template_hash["stats"].count
+    assert_equal "Stats", template_hash["name"]
+  end
+end