Ruby on Rails

> If what you want to do is store a set of values for something varying
> over time and wish to query the set, pick out max and min and so on
> then I suggest this is not best served by versioning. Instead model
> it in the normal way. So App has_many price_tiers, PriceTier
> belongs_to app, and a PriceTier has a date field you can query on.
>
> Colin

Thanks Colin, realised this is the way to go.
Unless I'm mistaken I can just use the created_at date field to query
on?

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