simple_scaffold.rb

# Source: https://github.com/Ben-M/simple_scaffold
def generate_controller(update_method, params, include_white_list_code=false)
  strong_params_method=white_list_code if include_white_list_code
  controller_code = <<-CODE
<% if namespaced? -%>
require_dependency "<%= namespaced_file_path %>/application_controller"
<% end -%>
<% module_namespacing do -%>
class <%= controller_class_name %>Controller < ApplicationController
  def index
    @<%= plural_table_name %> = <%= orm_class.all(class_name) %>
    render 'index'
  end
  def show
    @<%= singular_table_name %> = <%= orm_class.find(class_name, "params[:id]") %>
    render 'show'
  end
  def new
    @<%= singular_table_name %> = <%= orm_class.build(class_name) %>
    render 'new'
  end
  def edit
    @<%= singular_table_name %> = <%= orm_class.find(class_name, "params[:id]") %>
    render 'edit'
  end
  def create
    @<%= singular_table_name %> = <%= orm_class.build(class_name, "#{params}") %>
    if @<%= orm_instance.save %>
      redirect_to @<%= singular_table_name %>, notice: <%= "'\#{human_name} was successfully created.'" %>
    else
      render action: 'new'
    end
  end
  def update
    @<%= singular_table_name %> = <%= orm_class.find(class_name, "params[:id]") %>
    if @<%= orm_instance.#{update_method}("#{params}") %>
      redirect_to @<%= singular_table_name %>, notice: <%= "'\#{human_name} was successfully updated.'" %>
    else
      render action: 'edit'
    end
  end
  def destroy
    @<%= singular_table_name %> = <%= orm_class.find(class_name, "params[:id]") %>
    @<%= orm_instance.destroy %>
    redirect_to <%= index_helper %>_url, notice: <%= "'\#{human_name} was successfully destroyed.'" %>
  end
#{strong_params_method}
end
<% end -%>
  CODE
  file 'lib/templates/rails/scaffold_controller/controller.rb', controller_code
end

def white_list_code
  <<-CODE
  private
  # Only allow a trusted parameter "white list" through.
  def <%= "\#{singular_table_name}_params" %>
    <%- if attributes_names.empty? -%>
    params[<%= ":\#{singular_table_name}" %>]
    <%- else -%>
    params.require(<%= ":\#{singular_table_name}" %>).permit(<%= attributes_names.map { |name| ":\#{name}" }.join(', ') %>)
    <%- end -%>
  end
  CODE
end

def generate_explicit_routes
  code = <<-CODE
class Rails::ExplicitRouteGenerator < Rails::Generators::NamedBase
  def create_explicit_routes
    route "delete '/\#{plural_name}/:id'       => '\#{plural_name}\#destroy'\\n"

    route "put    '/\#{plural_name}/:id'       => '\#{plural_name}\#update'\\n"
    route "patch  '/\#{plural_name}/:id'       => '\#{plural_name}\#update'"
    route "post   '/\#{plural_name}'           => '\#{plural_name}\#create'"

    route "get    '/\#{plural_name}/:id'       => '\#{plural_name}\#show', as: '\#{singular_table_name}'\\n"
    route "get    '/\#{plural_name}/:id/edit'  => '\#{plural_name}\#edit', as: 'edit_\#{singular_table_name}'"
    route "get    '/\#{plural_name}/new'       => '\#{plural_name}\#new', as: 'new_\#{singular_table_name}'"

    route "get    '/\#{plural_name}'           => '\#{plural_name}\#index'\\n"
  end
end
  CODE
  file 'lib/generators/rails/explicit_route/explicit_route_generator.rb', code
end

environment 'config.generators.assets = false'
environment 'config.generators.helper = false'
environment 'config.generators.test_framework = false'
environment 'config.generators.stylesheets = false'
environment 'config.generators.resource_route = :explicit_route'

generate_explicit_routes

if Rails::VERSION::MAJOR>3
  environment 'config.generators.jbuilder = false'
  generate_controller("update", "\#{singular_table_name}_params", true)
else
  generate_controller("update_attributes", "params[:\#{singular_table_name}]")
end