require 'rails/generators'
require 'rails/generators/rails/resource/resource_generator'

module Rails
  module Generators
    class ResourceGenerator
      hook_for :serializer, default: true, boolean: true
    end
  end
end

require 'rails/generators'
require 'rails/generators/rails/resource/resource_generator'

module Rails
  module Generators
    class ResourceGenerator
      hook_for :serializer, default: true, type: :boolean
    end
  end
end

Fix thor warning to set type: :boolean, was setting `{ banner: "" }`
Fix thor warning to set type: :boolean, was setting `{ banner: "" }`

```
require "rails/generators/rails/model/model_generator"

module Rails
  module Generators
    class ResourceGenerator < ModelGenerator # :nodoc:
      include ResourceHelpers

      hook_for :resource_controller, required: true do |controller|
        invoke controller, [ controller_name, options[:actions] ]
      end

      class_option :actions, type: :array, banner: "ACTION ACTION", default: [],
                             desc: "Actions for the resource controller"

      hook_for :resource_route, required: true
    end
  end
end
```

```
 # .bundle/ruby/2.2.0/bundler/gems/rails-4c5f1bc9d45e/railties/lib/rails/generators/base.rb
      # Invoke a generator based on the value supplied by the user to the
      # given option named "name". A class option is created when this method
      # is invoked and you can set a hash to customize it.
      #
      # ==== Examples
      #
      #   module Rails::Generators
      #     class ControllerGenerator < Base
      #       hook_for :test_framework, aliases: "-t"
      #     end
      #   end
      #
      # The example above will create a test framework option and will invoke
      # a generator based on the user supplied value.
      #
      # For example, if the user invoke the controller generator as:
      #
      #   rails generate controller Account --test-framework=test_unit
      #
      # The controller generator will then try to invoke the following generators:
      #
      #   "rails:test_unit", "test_unit:controller", "test_unit"
      #
      # Notice that "rails:generators:test_unit" could be loaded as well, what
      # Rails looks for is the first and last parts of the namespace. This is what
      # allows any test framework to hook into Rails as long as it provides any
      # of the hooks above.
      #
      # ==== Options
      #
      # The first and last part used to find the generator to be invoked are
      # guessed based on class invokes hook_for, as noticed in the example above.
      # This can be customized with two options: :in and :as.
      #
      # Let's suppose you are creating a generator that needs to invoke the
      # controller generator from test unit. Your first attempt is:
      #
      #   class AwesomeGenerator < Rails::Generators::Base
      #     hook_for :test_framework
      #   end
      #
      # The lookup in this case for test_unit as input is:
      #
      #   "test_unit:awesome", "test_unit"
      #
      # Which is not the desired lookup. You can change it by providing the
      # :as option:
      #
      #   class AwesomeGenerator < Rails::Generators::Base
      #     hook_for :test_framework, as: :controller
      #   end
      #
      # And now it will look up at:
      #
      #   "test_unit:controller", "test_unit"
      #
      # Similarly, if you want it to also look up in the rails namespace, you
      # just need to provide the :in value:
      #
      #   class AwesomeGenerator < Rails::Generators::Base
      #     hook_for :test_framework, in: :rails, as: :controller
      #   end
      #
      # And the lookup is exactly the same as previously:
      #
      #   "rails:test_unit", "test_unit:controller", "test_unit"
      #
      # ==== Switches
      #
      # All hooks come with switches for user interface. If you do not want
      # to use any test framework, you can do:
      #
      #   rails generate controller Account --skip-test-framework
      #
      # Or similarly:
      #
      #   rails generate controller Account --no-test-framework
      #
      # ==== Boolean hooks
      #
      # In some cases, you may want to provide a boolean hook. For example, webrat
      # developers might want to have webrat available on controller generator.
      # This can be achieved as:
      #
      #   Rails::Generators::ControllerGenerator.hook_for :webrat, type: :boolean
      #
      # Then, if you want webrat to be invoked, just supply:
      #
      #   rails generate controller Account --webrat
      #
      # The hooks lookup is similar as above:
      #
      #   "rails:generators:webrat", "webrat:generators:controller", "webrat"
      #
      # ==== Custom invocations
      #
      # You can also supply a block to hook_for to customize how the hook is
      # going to be invoked. The block receives two arguments, an instance
      # of the current class and the class to be invoked.
      #
      # For example, in the resource generator, the controller should be invoked
      # with a pluralized class name. But by default it is invoked with the same
      # name as the resource generator, which is singular. To change this, we
      # can give a block to customize how the controller can be invoked.
      #
      #   hook_for :resource_controller do |instance, controller|
      #     instance.invoke controller, [ instance.name.pluralize ]
      #   end
      #
      def self.hook_for(*names, &block)
        options = names.extract_options!
        in_base = options.delete(:in) || base_name
        as_hook = options.delete(:as) || generator_name

        names.each do |name|
          unless class_options.key?(name)
            defaults = if options[:type] == :boolean
              {}
            elsif [true, false].include?(default_value_for_option(name, options))
              { banner: "" }
            else
              { desc: "#{name.to_s.humanize} to be invoked", banner: "NAME" }
            end

            class_option(name, defaults.merge!(options))
          end

          hooks[name] = [ in_base, as_hook ]
          invoke_from_option(name, options, &block)
        end
      end
```

```
  # .bundle/ruby/2.2.0/gems/thor-0.19.4/lib/thor/parser/option.rb:113:in `validate!'
    #   parse :foo => true
    #   #=> Option foo with default value true and type boolean
    #
    # The valid types are :boolean, :numeric, :hash, :array and :string. If none
    # is given a default type is assumed. This default type accepts arguments as
    # string (--foo=value) or booleans (just --foo).
    #
    # By default all options are optional, unless :required is given.
    def validate_default_type!
      default_type = case @default
      when nil
        return
      when TrueClass, FalseClass
        required? ? :string : :boolean
      when Numeric
        :numeric
      when Symbol
        :string
      when Hash, Array, String
        @default.class.name.downcase.to_sym
      end

      # TODO: This should raise an ArgumentError in a future version of Thor
      if default_type != @type
        warn "Expected #{@type} default value for '#{switch_name}'; got #{@default.inspect} (#{default_type})"
      end
    end
```
