Active Model Decimal Type
Attribute type for decimal, high-precision floating point numeric representation. It is registered under the :decimal
key.
class BagOfCoffee
include ActiveModel::Attributes
attribute :weight, :decimal
end
Numeric
instances are converted to BigDecimal
instances. Any other objects are cast using their to_d
method, except for blank strings, which are cast to nil
. If a to_d
method is not defined, the object is converted to a string using to_s
, which is then cast using to_d
.
bag = BagOfCoffee.new
bag.weight = 0.01
bag.weight # => 0.1e-1
bag.weight = "0.01"
bag.weight # => 0.1e-1
bag.weight = ""
bag.weight # => nil
bag.weight = :arbitrary
bag.weight # => nil (the result of `.to_s.to_d`)
Decimal
precision defaults to 18, and can be customized when declaring an attribute:
class BagOfCoffee
include ActiveModel::Attributes
attribute :weight, :decimal, precision: 24
end
Methods
Included Modules
Constants
BIGDECIMAL_PRECISION | = | 18 |