Methods
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Constants
YAML_TAG = 'tag:yaml.org,2002:float'
 
YAML_MAPPING = { 'Infinity' => '.Inf', '-Infinity' => '-.Inf', 'NaN' => '.NaN' }
 
DEFAULT_STRING_FORMAT = 'F'
 
Instance Public methods
_original_to_s(format = DEFAULT_STRING_FORMAT)
as_json(options = nil)

A BigDecimal would be naturally represented as a JSON number. Most libraries, however, parse non-integer JSON numbers directly as floats. Clients using those libraries would get in general a wrong number and no way to recover other than manually inspecting the string with the JSON code itself.

That’s why a JSON string is returned. The JSON literal is not numeric, but if the other end knows by contract that the data is supposed to be a BigDecimal, it still has the chance to post-process the string and get the real value.

Source: show 

# File activesupport/lib/active_support/json/encoding.rb, line 201
def as_json(options = nil) to_s end
encode_with(coder)

Source: show 

# File activesupport/lib/active_support/core_ext/big_decimal/conversions.rb, line 27
def encode_with(coder)
  string = to_s
  coder.represent_scalar(nil, YAML_MAPPING[string] || string)
end
to_d()

Source: show 

# File activesupport/lib/active_support/core_ext/big_decimal/conversions.rb, line 34
def to_d
  self
end
to_formatted_s(format = DEFAULT_STRING_FORMAT)
Also aliased as: to_s

Source: show 

# File activesupport/lib/active_support/core_ext/big_decimal/conversions.rb, line 40
def to_formatted_s(format = DEFAULT_STRING_FORMAT)
  _original_to_s(format)
end
to_s(format = DEFAULT_STRING_FORMAT)
Also aliased as: _original_to_s
to_yaml(opts = {})

This emits the number without any scientific notation. This is better than self.to_f.to_s since it doesn’t lose precision.

Note that reconstituting YAML floats to native floats may lose precision.

Source: show 

# File activesupport/lib/active_support/core_ext/big_decimal/conversions.rb, line 18
def to_yaml(opts = {})
  return super if defined?(YAML::ENGINE) && !YAML::ENGINE.syck?

  YAML.quick_emit(nil, opts) do |out|
    string = to_s
    out.scalar(YAML_TAG, YAML_MAPPING[string] || string, :plain)
  end
end