Rails 3，:json => @ model.to_json或:json => @模型 [英] Rails 3, :json => @model.to_json OR :json => @model

问题描述

我只是徘徊了两者之间的区别:

I just wandered the difference between:

format.json { render :json => @post, :include => [ :user ] }

...和

format.json { render :json => @post.to_json(:include => [ :user ]) }

它们似乎都起作用了?

推荐答案

是相同的.如果您看一下actionpack renderers.rb，将会看到它是如何工作的:

it's the same. if you have a look at actionpack renderers.rb you will see how it works:

add :json do |json, options|
  json = json.to_json(options) unless json.kind_of?(String)
  json = "#{options[:callback]}(#{json})" unless options[:callback].blank?
  self.content_type ||= Mime::JSON
  json
end

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