fix: base resource overriding

lib/avo.rb

@@ -75,7 +75,7 @@ def init
       Avo::Current.error_manager = Avo::ErrorManager.build
       # Check rails version issues only on NON Production environments
       unless Rails.env.production?
-        check_rails_version_issues 
+        check_rails_version_issues
         display_menu_editor_warning
       end
       Avo::Current.resource_manager = Avo::Resources::ResourceManager.build

lib/avo/engine.rb

@@ -55,6 +55,9 @@ class Engine < ::Rails::Engine
         Rails.autoloaders.main.push_dir(avo_directory, namespace: Avo)
         app.config.watchable_dirs[avo_directory] = [:rb]
       end
+
+      Rails.autoloaders.main.push_dir(Avo::Engine.root.join("app", "avo").to_s, namespace: Avo)
+      require_relative Avo::Engine.root.join("app", "avo", "base_resource.rb").to_s
     end
 
     initializer "avo.reloader" do |app|

spec/features/avo/resource_extension_spec.rb

@@ -0,0 +1,34 @@
+require "rails_helper"
+
+RSpec.feature "Resource extension", type: :feature do
+  Avo::Resources::CourseLink.define_method :test_base_resource_extension do
+    some_extended_method
+  end
+
+  it "no extension" do
+    expect(TestBuddy).not_to receive(:hi).with("Extension successfully")
+    expect { Avo::Resources::CourseLink.new.test_base_resource_extension }.to raise_error(NameError)
+  end
+
+  it "with extension" do
+    file_path = Rails.root.join("app/avo/base_resource.rb")
+    FileUtils.mkdir_p(File.dirname(file_path))
+    File.write file_path,
+      <<~RUBY
+        module Avo
+          class BaseResource < Avo::Resources::Base
+            def some_extended_method
+              TestBuddy.hi("Extension successfully")
+            end
+          end
+        end
+      RUBY
+
+    load file_path
+
+    expect(TestBuddy).to receive(:hi).with("Extension successfully").at_least :once
+    expect { Avo::Resources::CourseLink.new.test_base_resource_extension }.not_to raise_error
+
+    File.delete(file_path) if File.exist?(file_path)
+  end
+end