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require 'active_support/json/variable'
require 'active_support/json/encoders/object' # Require this file explicitly for rdoc
Dir[File.dirname(__FILE__) + '/encoders/**/*.rb'].each { |file| require file[0..-4] }
module ActiveSupport
module JSON
# When +true+, Hash#to_json will omit quoting string or symbol keys
# if the keys are valid JavaScript identifiers. Note that this is
# technically improper JSON (all object keys must be quoted), so if
# you need strict JSON compliance, set this option to +false+.
mattr_accessor :unquote_hash_key_identifiers
@@unquote_hash_key_identifiers = true
class CircularReferenceError < StandardError
end
class << self
REFERENCE_STACK_VARIABLE = :json_reference_stack #:nodoc:
# Converts a Ruby object into a JSON string.
def encode(value)
raise_on_circular_reference(value) do
value.send(:to_json)
end
end
def can_unquote_identifier?(key) #:nodoc:
unquote_hash_key_identifiers &&
ActiveSupport::JSON.valid_identifier?(key)
end
protected
def raise_on_circular_reference(value) #:nodoc:
stack = Thread.current[REFERENCE_STACK_VARIABLE] ||= []
raise CircularReferenceError, 'object references itself' if
stack.include? value
stack << value
yield
ensure
stack.pop
end
end
end
end
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