diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/big_decimal')
-rw-r--r-- | activesupport/lib/active_support/core_ext/big_decimal/conversions.rb | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/big_decimal/conversions.rb b/activesupport/lib/active_support/core_ext/big_decimal/conversions.rb new file mode 100644 index 0000000000..bc9d578f38 --- /dev/null +++ b/activesupport/lib/active_support/core_ext/big_decimal/conversions.rb @@ -0,0 +1,37 @@ +require 'yaml' + +module ActiveSupport #:nodoc: + module CoreExtensions #:nodoc: + module BigDecimal #:nodoc: + module Conversions + DEFAULT_STRING_FORMAT = 'F'.freeze + YAML_TAG = 'tag:yaml.org,2002:float'.freeze + YAML_MAPPING = { 'Infinity' => '.Inf', '-Infinity' => '-.Inf', 'NaN' => '.NaN' } + + def self.included(base) #:nodoc: + base.class_eval do + alias_method :_original_to_s, :to_s + alias_method :to_s, :to_formatted_s + + yaml_as YAML_TAG + end + end + + def to_formatted_s(format = DEFAULT_STRING_FORMAT) + _original_to_s(format) + end + + # 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. + def to_yaml(opts = {}) + YAML.quick_emit(nil, opts) do |out| + string = to_s + out.scalar(YAML_TAG, YAML_MAPPING[string] || string, :plain) + end + end + end + end + end +end |