An ActiveModel::Type that encrypts/decrypts strings of text.

This is the central piece that connects the encryption system with encrypts declarations in the model classes. Whenever you declare an attribute as encrypted, it configures an EncryptedAttributeType for that attribute.

Methods

Included Modules

Attributes

[R] cast_type
[R] scheme

Class Public methods

new(scheme:, cast_type: ActiveModel::Type::String.new, previous_type: false)

Options

  • :scheme - A Scheme with the encryption properties for this attribute.

  • :cast_type - A type that will be used to serialize (before encrypting) and deserialize (after decrypting). ActiveModel::Type::String by default.

# File activerecord/lib/active_record/encryption/encrypted_attribute_type.rb, line 23
def initialize(scheme:, cast_type: ActiveModel::Type::String.new, previous_type: false)
  super()
  @scheme = scheme
  @cast_type = cast_type
  @previous_type = previous_type
end

Instance Public methods

changed_in_place?(raw_old_value, new_value)

# File activerecord/lib/active_record/encryption/encrypted_attribute_type.rb, line 42
def changed_in_place?(raw_old_value, new_value)
  old_value = raw_old_value.nil? ? nil : deserialize(raw_old_value)
  old_value != new_value
end

deserialize(value)

# File activerecord/lib/active_record/encryption/encrypted_attribute_type.rb, line 30
def deserialize(value)
  cast_type.deserialize decrypt(value)
end

serialize(value)

# File activerecord/lib/active_record/encryption/encrypted_attribute_type.rb, line 34
def serialize(value)
  if serialize_with_oldest?
    serialize_with_oldest(value)
  else
    serialize_with_current(value)
  end
end