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Daniel Doubrovkine

aka dB., @awscloud, former CTO @artsy, +@vestris, NYC

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I found this quite unusual. I needed to receive an array with some nested hashes part of a query string into a JSON API. Passing encoded JSON wasn’t looking hot. Turns out, in Rails, this can be done with the [] syntax.


What the heck is this [] syntax?! Why is there multiple widget entries?! There’re a few good articles on this, including this one. Web developers apparently have been doing this forever. I am far behind :(

Here’s what Rails parses from this query string.

    :widget => ["first-widget",  "another widget"],
    :gadget => ["a-gadget"]