How do I modify my Rails app to always include the milliseconds information with

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Editorial Team

Asked: May 24, 20262026-05-24T11:52:37+00:00 2026-05-24T11:52:37+00:00

How do I modify my Rails app to always include the milliseconds information with the created_at field of my models?

This question has the answer for how to do it for an individual model, but I want to do it globally.

For example, when I retrieve all my Item models (by hitting /items with a GET), I get the following JSON:

[{"created_at":"2011-08-07T23:42:15Z","updated_at":"2011-08-07T23:42:15Z","id":180,"user_id":6,"content":"test"}]

But note that the created_at field doesn’t have any information about the millisecond that it was created. How do I include that for all my models?

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Editorial Team · Answer 1 · 2026-05-24T11:52:37+00:00

Editorial Team

I was able to override the created_at attribute selector for my Item model using this guide.

Anyone know how to do it for all models?

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