Ruby on Rails- how to generate a controller in ruby on rails- ruby on rails tutorial - rails guides - rails tutorial - ruby rails

$ rails generate controller Posts

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$ rails g controller Posts

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If you open up the newly generated app/controllers/posts_controller.rb you'll see a controller with no actions:

class PostsController < ApplicationController
    # empty
end

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It's possible to create default methods for the controller by passing in controller name arguments.

$ rails g controller ControllerName method1 method2

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To create a controller within a module, specify the controller name as a path like parent_module/controller_name. For example:

$ rails generate controller CreditCards open debit credit close
# OR
$ rails g controller CreditCards open debit credit close

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This will generate the following files:

Controller: app/controllers/credit_cards_controller.rb
Test:       test/controllers/credit_cards_controller_test.rb
Views:      app/views/credit_cards/debit.html.erb [...etc]
Helper:     app/helpers/credit_cards_helper.rb

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A controller is simply a class that is defined to inherit from ApplicationController. It's inside this class that you'll define methods that will become the actions for this controller.

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