method

touch

Importance_2
v2.3.8 - Show latest stable - 1 note - Class: ActiveRecord::Timestamp
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touch(attribute = nil) public

Saves the record with the updated_at/on attributes set to the current time. If the save fails because of validation errors, an ActiveRecord::RecordInvalid exception is raised. If an attribute name is passed, that attribute is used for the touch instead of the updated_at/on attributes.

Examples: 

  product.touch               # updates updated_at
  product.touch(:designed_at) # updates the designed_at attribute
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March 17, 2010
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Validations

out of the box touch will run with validations