method
touch
v4.0.2 -
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Class: ActiveRecord::Persistence
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- What's this?
touch(name = nil)
public
Saves the record with the updated_at/on attributes set to the current time. Please note that no validation is performed and only the after_touch callback is executed. If an attribute name is passed, that attribute is updated along with updated_at/on attributes.
product.touch # updates updated_at/on product.touch(:designed_at) # updates the designed_at attribute and updated_at/on
If used along with belongs_to then touch will invoke touch method on associated object.
class Brake < ActiveRecord::Base belongs_to :car, touch: true end class Car < ActiveRecord::Base belongs_to :corporation, touch: true end # triggers @brake.car.touch and @brake.car.corporation.touch @brake.touch
Note that touch must be used on a persisted object, or else an ActiveRecordError will be thrown. For example:
ball = Ball.new ball.touch(:updated_at) # => raises ActiveRecordError