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28 lines
904 B
Markdown
28 lines
904 B
Markdown
# Set A Timestamp Field To The Current Time
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To set a timestamp field to the current time, you could reach for the `#update`
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method like you would when modifying any other field.
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```ruby
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MagicLink
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.find_by(token: some_token)
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.update(used_at: Time.zone.now)
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```
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This works, but it's more verbose than is necessary and requires that you
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construct the right timestamp for _now_ (time zones and all).
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Rails has a more concise and idomatic way of doing this:
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[`#touch`](https://api.rubyonrails.org/v6.1.0/classes/ActiveRecord/Persistence.html#method-i-touch).
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```ruby
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MagicLink
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.find_by(token: some_token)
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.touch(:used_at)
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```
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Updating a timestamp to the current time is a common action in web
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applications, so Rails offers the `#touch` method as a shorthand for doing it.
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This will set the given field, in this case `:used_at`, to the current time.
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This will also set the `updated_at/on` field.
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