crud_management.rb

module CrudManagement
  extend ActiveSupport::Concern

  module ClassMethods
    def crudify(resource_name, model_name = nil, options = {})
      model_name ||= resource_name

      options[:plural_name] ||= resource_name.to_s.pluralize
      options[:singular_name] ||= resource_name.to_s.singularize
      options[:permitted_params] ||= []
      options[:route_prefix] ||= ''
      options[:scopes] ||= :all
      options[:order] ||= {}
      index_route = [options[:route_prefix],
                     options[:plural_name],
                     'path'].join('_')
      if options[:scopes].respond_to?(:map)
        options[:scopes].map { |scope| scope }.join('.')
      end

      code = %(
before_action :set_#{options[:singular_name]},
              only: %i[edit update destroy show]

def index
  @#{options[:plural_name]} = #{model_name.capitalize}.#{options[:scopes]}.order(#{options[:order]})
end

def new
  @#{options[:singular_name]} = #{model_name.capitalize}.new
end

def create
  @#{options[:singular_name]} = #{model_name.capitalize}.new(#{options[:singular_name]}_params)
  if @#{options[:singular_name]}.save
    redirect_to #{index_route},
                success: "#{options[:singular_name].capitalize} saved successfully"
  else
    flash.now[:alert] = @#{options[:singular_name]}.errors.full_messages
    render :new
  end
end

def edit; end

def update
  if @#{options[:singular_name]}.update(#{options[:singular_name]}_params)
    redirect_to #{index_route},
                success: "#{options[:singular_name].capitalize} saved successfully"
  else
    flash.now[:alert] = @#{options[:singular_name]}.errors.full_messages
    render :new
  end
end

def destroy
  if @#{options[:singular_name]}.destroy!
    redirect_to #{index_route}, success: '#{resource_name.capitalize} deleted'
  else
    redirect_to #{index_route}, alert: 'Could not delete the #{resource_name}'
  end
end

private

def #{options[:singular_name]}_params
  params.require(:#{options[:singular_name]}).permit(#{options[:permitted_params]})
end

def set_#{options[:singular_name]}
  @#{options[:singular_name]} = #{model_name.capitalize}.find(params[:id])
end
)
      logger.debug code
      module_eval code, __FILE__, __LINE__
    end
  end
end