class ActiveRecord::Type::Float

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

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.

  bag = BagOfCoffee.new

  bag.weight = “0.25” bag.weight # => 0.25

  bag.weight = “” bag.weight # => nil

  bag.weight = “NaN” bag.weight # => Float::NAN

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

# 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