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Active Model Float Type

Attribute type for floating point numeric values. It is registered under the :float key.

class BagOfCoffee
  include ActiveModel::Attributes

  attribute :weight, :float
end

bag = BagOfCoffee.new

bag.weight = "0.25"
bag.weight # => 0.25

bag.weight = ""
bag.weight # => nil

bag.weight = "NaN"
bag.weight # => Float::NAN

Values are cast using their to_f method, except for the following strings:

  • Blank strings are cast to nil.

  • "Infinity" is cast to Float::INFINITY.

  • "-Infinity" is cast to -Float::INFINITY.

  • "NaN" is cast to Float::NAN.

Methods
T
Included Modules

Instance Public methods

type()

Source: show | on GitHub 

# File activemodel/lib/active_model/type/float.rb, line 39
def type
  :float
end

type_cast_for_schema(value)

Source: show | on GitHub 

# File activemodel/lib/active_model/type/float.rb, line 43
def type_cast_for_schema(value)
  return "::Float::NAN" if value.try(:nan?)
  case value
  when ::Float::INFINITY then "::Float::INFINITY"
  when -::Float::INFINITY then "-::Float::INFINITY"
  else super
  end
end