Methods
#
A
Instance Public methods
_assign_attribute(k, v)

Source: show | on GitHub 

# File activemodel/lib/active_model/attribute_assignment.rb, line 48
def _assign_attribute(k, v)
  setter = :"#{k}="
  if respond_to?(setter)
    public_send(setter, v)
  else
    raise UnknownAttributeError.new(self, k)
  end
end
_assign_attributes(attributes)

Source: show | on GitHub 

# File activemodel/lib/active_model/attribute_assignment.rb, line 42
def _assign_attributes(attributes)
  attributes.each do |k, v|
    _assign_attribute(k, v)
  end
end
assign_attributes(new_attributes)

Allows you to set all the attributes by passing in a hash of attributes with keys matching the attribute names.

If the passed hash responds to permitted? method and the return value of this method is false an ActiveModel::ForbiddenAttributesError exception is raised.

class Cat
  include ActiveModel::AttributeAssignment
  attr_accessor :name, :status
end

cat = Cat.new
cat.assign_attributes(name: "Gorby", status: "yawning")
cat.name # => 'Gorby'
cat.status # => 'yawning'
cat.assign_attributes(status: "sleeping")
cat.name # => 'Gorby'
cat.status # => 'sleeping'

Source: show | on GitHub 

# File activemodel/lib/active_model/attribute_assignment.rb, line 28
  def assign_attributes(new_attributes)
    if !new_attributes.respond_to?(:stringify_keys)
      raise ArgumentError, "When assigning attributes, you must pass a hash as an argument."
    end
    return if new_attributes.empty?

    attributes = new_attributes.stringify_keys
    _assign_attributes(sanitize_for_mass_assignment(attributes))
  end

  alias attributes= assign_attributes

  private

    def _assign_attributes(attributes)
      attributes.each do |k, v|
        _assign_attribute(k, v)
      end
    end

    def _assign_attribute(k, v)
      setter = :"#{k}="
      if respond_to?(setter)
        public_send(setter, v)
      else
        raise UnknownAttributeError.new(self, k)
      end
    end
end