ActiveRecord not saving after updating attribute

Question

I\'m wondering if there is something at work here that I don\'t understand or if I\'ve run into a bug in ActiveRecord (4.1.1).

I have a database full of records with

Answer 1

will_change!

You can also use:

test.json_data_will_change!   # Goes before the save.

This will tell ActiveModel that the attribute, json_data, has changed (i.e. it's dirty ← there's a joke there somewhere) and will update the value properly on save.

See Rails is not saving an attribute that is changed for some more details as well.