Why do date helpers not work in Rails console?

Question

I have a datetime attribute on a record:

 1.9.3p194 :024> f.last_contact
 => Thu, 11 Aug 2011 00:00:00 UTC +00:00

But when I try time_ago_in_words at the console, it doesn't work:

> time_ago_in_words(f.last_contact)
NoMethodError: undefined method `time_ago_in_words' for main:Object

I also tried distance_of_time_in_words which the docs say should work with Time, Date & DateTime objects.

> to_time = Time.now
 => 2012-09-08 12:22:16 -0500 
> distance_of_time_in_words(f.last_contact, to_time)
NoMethodError: undefined method `distance_of_time_in_words' for main:Object

What is the cause of this? Shouldn't Rails Console load all the necessary libraries and dependencies for all of Rails methods to work?

score 85 · Accepted Answer · answered Sep 08 '12 at 17:37

85

You can use all helpers (built-in and your own) through helper object

helper.time_ago_in_words(1.hour.ago)
=> "about 1 hour"

Or import required helpers

include ActionView::Helpers::DateHelper
time_ago_in_words(1.hour.ago)
=> "about 1 hour"

answered Sep 08 '12 at 17:37

dimuch

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How can that be used in this scenario: `@user.current_sign_in_at.time_ago_in_words` (in the view)? – stevec Sep 17 '20 at 15:42
For some reason having "helpers" instead of "helper" helped me – molexi May 11 '21 at 23:57

score 8 · Answer 2 · edited May 23 '17 at 12:26

Try

helper.time_ago_in_words(...)
helper.distance_of_time_in_words(...)

Calling helper. seems to give you access to any/all defined helpers.

More info in this answer: How do I call controller/view methods from the console in Rails?

The reason, I think, that you can't just call the helper directly is because they're not in scope from where you are (in the console), as opposed to code that's running inside a view where the helpers are in scope.

Why do date helpers not work in Rails console?

2 Answers2

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