padrino/padrino-framework · error · SystemExit

<= You are using '#{tmp_ext}' and for admin we only support

Error message

<= You are using '#{tmp_ext}' and for admin we only support '#{supported_ext.join(', ')}'. Please use #{supported_ext.map { |ext| "-e #{ext}" }.join(' or ')}

What it means

The same generator guard for the rendering engine: the admin generator only emits haml, slim or erb templates (Actions#supported_ext). tmp_ext comes from the -e/--renderer option or, when omitted, from the project's renderer component choice; if neither is in the list, it prints this notice and raises SystemExit without generating anything.

Source

Thrown at padrino-admin/lib/padrino-admin/generators/admin_app.rb:51

      class_option :destroy,        type: :boolean, aliases: '-d', default: false
      class_option :renderer,       type: :string,  aliases: '-e',                     desc: 'Rendering engine (erb, haml, slim)'
      class_option :admin_model,    type: :string,  aliases: '-m', default: 'Account', desc: 'The name of model for access controlling'
      class_option :admin_name,     type: :string,  aliases: '-a', default: 'admin',   desc: 'The admin application name and path'
      # class_option :models_path,     desc: 'The models destination path', default: '.', type: :string

      # Copies over the Padrino base admin application.
      def create_admin
        self.destination_root = options[:root]
        if in_app_root?
          unless supported_orm.include?(orm)
            say "<= At the moment, Padrino only supports #{supported_orm.join(' or ')}. Sorry!", :yellow
            raise SystemExit
          end

          tmp_ext = options[:renderer] || fetch_component_choice(:renderer)
          unless supported_ext.include?(tmp_ext.to_sym)
            say "<= You are using '#{tmp_ext}' and for admin we only support '#{supported_ext.join(', ')}'. Please use #{supported_ext.map { |ext| "-e #{ext}" }.join(' or ')}", :yellow
            raise SystemExit
          end

          # Get the app's namespace.
          @app_name = fetch_app_name

          # setup admin app name
          @admin_name = options[:admin_name].classify
          @admin_path = options[:admin_name].underscore

          store_component_choice(:admin_renderer, tmp_ext)

          self.behavior = :revoke if options[:destroy]

          empty_directory destination_root(@admin_path)

          # Setup Admin Model
          @model_name     = options[:admin_model].classify
          @model_singular = @model_name.underscore

View on GitHub (pinned to 167044f3d5)

Solutions

1. Pass an explicitly supported renderer: `padrino g admin -e erb` (or haml/slim)
2. Or change the project's renderer component in .components to haml/slim/erb and re-run without -e
3. Verify .components has a valid renderer: line before generating

Example fix

# before
bundle exec padrino g admin -e liquid

# after
bundle exec padrino g admin -e erb

renderer = (options[:renderer] || File.read('.components')[/^renderer:\s*(.+)/, 1]).to_s.strip.to_sym
abort "admin supports haml/slim/erb, got #{renderer}" unless %i[haml slim erb].include?(renderer)

def admin_supported_renderer?(ext) = %i[haml slim erb].include?(ext.to_sym)

begin
  Padrino::Generators::AdminApp.start(['-e', 'erb'])
rescue SystemExit
  # unsupported renderer — pass -e haml/slim/erb explicitly
end

When it happens

Trigger: `padrino g admin -e liquid` (or any engine outside haml/slim/erb); running the generator in a project whose .components renderer is unsupported; a blank renderer component so tmp_ext.to_sym misses the list.

Common situations: Apps generated with a template engine the project generator permits but the admin generator does not (liquid, erubis, etc.); passing a wrong -e value; hand-edited .components with an empty renderer line.

Related errors

• <= At the moment, Padrino only supports #{supported_orm.join
• Model '#{klass_name}' could not be found! Perhaps you would
• Adapter #{orm} is not yet supported!
• Popover requires tooltip.js
• Role #{role} must be present and must be a symbol!

AI-assisted analysis of padrino/padrino-framework@167044f3d5 (2026-08-23). Data as JSON: /api/errors/0d26bbbbe4be7388. Report an issue: GitHub.