Scaffolding Rails4 Empty Controller

问题

I'm using multiple scaffolding in my testapp project.

i have created 1st scaffold like this:

rails g Post title desc:text

it was successful and created all relevant files and controller as well.

but when i made another scaffold :

testapp$ rails g scaffold product name:string information:text 'price:decimal{7,2}' stock:integer available:boolean
      invoke  active_record
      create    db/migrate/20140513062549_create_products.rb
      create    app/models/product.rb
      invoke    test_unit
      create      test/models/product_test.rb
      create      test/fixtures/products.yml
      invoke  resource_route
       route    resources :products
      invoke  inherited_resources_controller
      create    app/controllers/products_controller.rb
      invoke    erb
      create      app/views/products
      create      app/views/products/index.html.erb
      create      app/views/products/edit.html.erb
      create      app/views/products/show.html.erb
      create      app/views/products/new.html.erb
      create      app/views/products/_form.html.erb
      invoke    test_unit
      create      test/controllers/products_controller_test.rb
      invoke    helper
      create      app/helpers/products_helper.rb
      invoke      test_unit
      create        test/helpers/products_helper_test.rb
      invoke    jbuilder
      create      app/views/products/index.json.jbuilder
      create      app/views/products/show.json.jbuilder
      invoke  assets
      invoke    coffee
      create      app/assets/javascripts/products.js.coffee
      invoke    scss
      create      app/assets/stylesheets/products.css.scss
      invoke  scss
   identical    app/assets/stylesheets/scaffolds.css.scss

but when i open the controller app/controllers/products_controller.rb it is empty, why so ??

1 more thing i'm also using activeadmin, i know it has nothing to do with it.

回答1:

I can't reproduce this on a basic Rails installation:

$ rails new empty && cd empty
$ rails g scaffold Post title desc:text
$ rails g scaffold product name:string information:text 'price:decimal{7,2}' stock:integer available:boolean

After this, app/controllers/products_controller.rb has all the lines I'd expect it to have:

$ wc -l app/controllers/products_controller.rb
      74 app/controllers/products_controller.rb

That said, if I add ActiveAdmin to the Gemfile:

$ echo 'gem "activeadmin", github: "gregbell/active_admin"' >> Gemfile && bundle

and generate the scaffold:

$ rails g scaffold product name:string information:text 'price:decimal{7,2}' stock:integer available:boolean

my app/controllers/products_controller.rb contains a lot less code. It's not empty, but almost:

class ProductsController < InheritedResources::Base
end

If this is also what you're seeing, your problem comes from the fact that ActiveAdmin uses inherited_resources to do some of the heavy lifting. And you've ended up with am InheritedResource controller.

The controller should work perfectly fine, though.

来源：https://stackoverflow.com/questions/23624311/scaffolding-rails4-empty-controller

标签

ruby-on-rails

model-view-controller

ruby-on-rails-4

scaffolding

scaffold