Class: ActiveModel::Type::Float
Relationships & Source Files | |
Super Chains via Extension / Inclusion / Inheritance | |
Class Chain:
self,
Value
|
|
Instance Chain:
self,
Value
|
|
Inherits: |
ActiveModel::Type::Value
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Defined in: | activemodel/lib/active_model/type/float.rb |
Overview
Active Model Float Type
::ActiveModel::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 toFloat::INFINITY
. -
"-Infinity"
is cast to-Float::INFINITY
. -
"NaN"
is cast toFloat::NAN
.bag = BagOfCoffee.new
bag.weight = “0.25” bag.weight # => 0.25
bag.weight = “” bag.weight # => nil
bag.weight = “NaN” bag.weight # => Float::NAN
Class Method Summary
Value
- Inherited
.new | Initializes a type with three basic configuration settings: precision, limit, and scale. |
Instance Attribute Summary
Value
- Inherited
Instance Method Summary
Value
- Inherited
#==, #as_json, #assert_valid_value, | |
#cast |
|
#changed? | Determines whether a value has changed for dirty checking. |
#changed_in_place? | Determines whether the mutable value has been modified since it was read. |
#deserialize | Converts a value from database input to the appropriate ruby type. |
#eql? | Alias for Value#==. |
#hash, | |
#serializable? | Returns true if this type can convert |
#serialize | Casts a value from the ruby type to a type that the database knows how to understand. |
#type | Returns the unique type name as a |
#cast_value | Convenience method for types which do not need separate type casting behavior for user and database inputs. |
Constructor Details
This class inherits a constructor from ActiveModel::Type::Value
Instance Method Details
#type
[ GitHub ]# File 'activemodel/lib/active_model/type/float.rb', line 39
def type :float end