support column_hash not respond_to

lib/generators/simple_controller/simple_controller_generator.rb

@@ -12,7 +12,7 @@ class SimpleControllerGenerator < Rails::Generators::NamedBase
   def setup
     return if options["auth-only"]
     @routes = RSpec::Rails::Swagger::RouteParser.new(controller_path.sub(/^\//, '')).routes
-    p "Warning!! Resource is not exist, CHECK & regenerate after you have configurate the model and routes already" if resource_class&.columns_hash.blank?
+    p "Warning!! Resource is not exist, CHECK & regenerate after you have configurate the model and routes already" if resource_class.blank?
   end
 
   def create_controller_files

lib/generators/simple_controller/templates/specs/spec.rb.tt

@@ -5,8 +5,8 @@ RSpec.describe '<%= controller_path %>', type: :request, capture_examples: true,
     type: :object, properties: {
       <%= resource_singular %>: {
         type: :object, properties: {
-  <%- if resource_class&.columns_hash.present? -%>
-  <%- resource_class.columns_hash.except('id', 'created_at', 'updated_at').values.each do |column| -%>
+  <%- if resource_class.respond_to?(:columns_hash) && resource_class&.columns_hash.present? -%>
+  <%- resource_class.respond_to?(:columns_hash) && resource_class.columns_hash.except('id', 'created_at', 'updated_at').values.each do |column| -%>
           <%= column.name %>: { type: :<%= column.type %>, description: '<%= column&.comment %>' },
   <%- end -%>
   <%- end -%>