class Hoodoo::Presenters::Decimal
A JSON Decimal
schema member.
Constants
- VALIDATOR
In theory this is derived from Rubinius source, but “master” didn’t seem to include it at the time of writing. See:
github.com/rubinius/rubinius/ stackoverflow.com/questions/1034418/determine-if-a-string-is-a-valid-float-value
Attributes
The precision of the Decimal
.
Public Class Methods
Initialize a Decimal
instance with the appropriate name and options.
name
-
The JSON key.
options
-
A
Hash
of options, e.g. :required => true, :precision => 10.
Hoodoo::Presenters::Field::new
# File lib/hoodoo/presenters/types/decimal.rb, line 27 def initialize( name, options = {} ) super( name, options ) unless options.has_key?( :precision ) raise ArgumentError.new( 'Hoodoo::Presenters::Decimal must have a :precision' ) end @precision = options[ :precision ] end
Public Instance Methods
Check if data is a valid Decimal
and return a Hoodoo::Errors
instance.
Decimals are expressed in JSON as Strings with any amount of leading or trailing space, can be positive or negative and may use simple (e.g. "-12.45"
) or scientific (e.g. "-0.1245e2"
) notation with a lower case or capital E
in the latter case.
A leading “0” before a decimal place may be omitted; “0.12” and “.12” are considered equivalent and valid. An optional leading “+” is allowed for positive numbers. Between digits, an underscore is permitted as a visual separator; “12_431_999” and “12431999” are equivalent and valid.
Hoodoo::Presenters::Field#validate
# File lib/hoodoo/presenters/types/decimal.rb, line 49 def validate( data, path = '' ) errors = super( data, path ) return errors if errors.has_errors? || ( ! @required && data.nil? ) unless data.is_a?( ::String ) && data.match( VALIDATOR ) != nil errors.add_error( 'generic.invalid_decimal', :message => "Field `#{ full_path( path ) }` is an invalid decimal", :reference => { :field_name => full_path( path ) } ) end errors end