45 lines
1.6 KiB
Ruby
45 lines
1.6 KiB
Ruby
module Draper
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module DecoratesAssigned
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# @overload decorates_assigned(*variables, options = {})
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# Defines a helper method to access decorated instance variables.
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#
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# @example
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# # app/controllers/articles_controller.rb
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# class ArticlesController < ApplicationController
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# decorates_assigned :article
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#
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# def show
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# @article = Article.find(params[:id])
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# end
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# end
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#
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# # app/views/articles/show.html.erb
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# <%= article.decorated_title %>
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#
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# @param [Symbols*] variables
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# names of the instance variables to decorate (without the `@`).
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# @param [Hash] options
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# @option options [Decorator, CollectionDecorator] :with (nil)
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# decorator class to use. If nil, it is inferred from the instance
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# variable.
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# @option options [Hash, #call] :context
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# extra data to be stored in the decorator. If a Proc is given, it will
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# be passed the controller and should return a new context hash.
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def decorates_assigned(*variables)
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factory = Draper::Factory.new(variables.extract_options!)
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variables.each do |variable|
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undecorated = "@#{variable}"
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decorated = "@decorated_#{variable}"
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define_method variable do
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return instance_variable_get(decorated) if instance_variable_defined?(decorated)
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instance_variable_set decorated, factory.decorate(instance_variable_get(undecorated), context_args: self)
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end
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helper_method variable
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end
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end
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end
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end
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