Methods

Attributes

[R] limit
[R] precision
[R] scale

Class Public methods

new(precision: nil, limit: nil, scale: nil)

Source: 

# File activemodel/lib/active_model/type/value.rb, line 8
def initialize(precision: nil, limit: nil, scale: nil)
  @precision = precision
  @scale = scale
  @limit = limit
end

Instance Public methods

==(other)

Also aliased as: eql?

Source: 

# File activemodel/lib/active_model/type/value.rb, line 101
def ==(other)
  self.class == other.class &&
    precision == other.precision &&
    scale == other.scale &&
    limit == other.limit
end

assert_valid_value(*)

Source: 

# File activemodel/lib/active_model/type/value.rb, line 113
def assert_valid_value(*)
end

cast(value)

Type casts a value from user input (e.g. from a setter). This value may be a string from the form builder, or a ruby object passed to a setter. There is currently no way to differentiate between which source it came from.

The return value of this method will be returned from ActiveRecord::AttributeMethods::Read#read_attribute. See also: Value#cast_value.

value The raw input, as provided to the attribute setter.

Source: 

# File activemodel/lib/active_model/type/value.rb, line 37
def cast(value)
  cast_value(value) unless value.nil?
end

changed?(old_value, new_value, _new_value_before_type_cast)

Determines whether a value has changed for dirty checking. old_value and new_value will always be type-cast. Types should not need to override this method.

Source: 

# File activemodel/lib/active_model/type/value.rb, line 64
def changed?(old_value, new_value, _new_value_before_type_cast)
  old_value != new_value
end

changed_in_place?(raw_old_value, new_value)

Determines whether the mutable value has been modified since it was read. Returns false by default. If your type returns an object which could be mutated, you should override this method. You will need to either:

or

raw_old_value The original value, before being passed to deserialize.

new_value The current value, after type casting.

Source: 

# File activemodel/lib/active_model/type/value.rb, line 85
def changed_in_place?(raw_old_value, new_value)
  false
end

deserialize(value)

Converts a value from database input to the appropriate ruby type. The return value of this method will be returned from ActiveRecord::AttributeMethods::Read#read_attribute. The default implementation just calls Value#cast.

value The raw input, as provided from the database.

Source: 

# File activemodel/lib/active_model/type/value.rb, line 23
def deserialize(value)
  cast(value)
end

eql?(other)

Alias for: ==

hash()

Source: 

# File activemodel/lib/active_model/type/value.rb, line 109
def hash
  [self.class, precision, scale, limit].hash
end

serialize(value)

Casts a value from the ruby type to a type that the database knows how to understand. The returned value from this method should be a String, Numeric, Date, Time, Symbol, true, false, or nil.

Source: 

# File activemodel/lib/active_model/type/value.rb, line 45
def serialize(value)
  value
end

Instance Private methods

cast_value(value)

Convenience method for types which do not need separate type casting behavior for user and database inputs. Called by Value#cast for values except nil.

Source: 

# File activemodel/lib/active_model/type/value.rb, line 120
def cast_value(value) # :doc:
  value
end