I need to shift the time_zone of some (DateTime) attributes from a resource. Ideally, I’d like to do it right after records are loaded from db. Is it possible? How?

There are a couple different ways you could do it, depending on the use case. Have you considered a calculation? This would let you do it on demand when you need it. calculate :thing_in_time_zone, :datetime, YourCalculation Then you could load that calculation when making queries using Ash.Query.l…

Also, I’m not sure what Ash.Transform is BTW, I don’t think we have anything by that name.

Thanks Zach. Trying the second option, right now. Is there any documentation related to preparations?

There is some frustratingly out of date bits here: Ash.Resource.Preparation — ash v3.29.3 Ultimately a preparation can look one of two ways: prepare fn query, context -> ... end # or prepare Module prepare {Module, foo: :bar} # or with opts defmodule Module do use Ash.Resource.Preparation …

[image] zachdaniel: preparations do prepare fn query, _ -> Ash.Query.after_action(query, fn query, results -> Enum.map(results, &do_whatever_you_want/1) end) end end Thanks, Zach. That worked.

How do I use Ash.Transform

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tellesleandro September 29, 2023, 4:20am 6

Thanks, Zach. That worked.