Andrew,
I agree they shouldn’t happen in the first place, but unfortunately
they crop up in the real world, you get a hash from a JSON object and
mix that with some params, and you might do this without even realizing
it.
This is why I propose that AR spit out a warning message (perhaps
upgraded to an error in future versions) if this happens.
Andrew
On 24 Mar 2016, at 16:09, Andrew Kaspick wrote:
I'd label this purely as undefined behavior and such cases shouldn't
occur
in the first place.
On Thu, Mar 24, 2016 at 6:59 PM, Andrew Selder
<[email protected]>
wrote:
Hi all,
After we got bit by it a couple times recently, I was thinking of
submitting a PR for ActiveRecord that would issue a warning if you
submit a
hash containing the same key as both a symbol and a string to any of
the AR
construction methods (create, new, update_attributes, etc…) . As
far as I
can tell, the behavior when this happens in undefined (and change
between
Rails 3 and 4 for example).
For example:
attr = { ‘a’ => 123, :a => 456 }
ARModel.create!(attr)
In Rails 3, you’ll get an object with the ‘a’ attributes set to
456, in
Rails 4, you’ll get 123.
I think this kind of things is almost always unintentional and worth
a
warning.
I’ll be happy to code this up and submit it if people think it
would be
useful and accepted.
Please let me know your thoughts and feedback.
Thanks,
Andrew
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