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method

as_json

Importance_0
v3.2.1 - Show latest stable - 0 notes - Class: Hash
as_json(options = nil) public

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# File activesupport/lib/active_support/json/encoding.rb, line 225
  def as_json(options = nil) #:nodoc:
    # create a subset of the hash by applying :only or :except
    subset = if options
      if attrs = options[:only]
        slice(*Array.wrap(attrs))
      elsif attrs = options[:except]
        except(*Array.wrap(attrs))
      else
        self
      end
    else
      self
    end

    # use encoder as a proxy to call as_json on all values in the subset, to protect from circular references
    encoder = options && options[:encoder] || ActiveSupport::JSON::Encoding::Encoder.new(options)
    result = self.is_a?(ActiveSupport::OrderedHash) ? ActiveSupport::OrderedHash : Hash
    result[subset.map { |k, v| [k.to_s, encoder.as_json(v, options)] }]
  end
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