I just noticed that the Yahoo! GeoPlanet API made an API change to its JSON API that breaks existing apps. (I noticed because it broke the sign-up process for the new Singularity teaser site.)

Googling around, I couldn't find any announcements from Yahoo! about this. I don't know if there's a notification feed somewhere that I'm missing -- if so, I'd appreciate it if someone could point me in the right direction. Otherwise, in case any other developres are using the Yahoo! GeoPlanet JSON API and are affected by this, here's a summary of the change from the post I just made on the yws-geo forum:

I just realized that you removed the 'place' array from the JSON object returned from places.q() calls (e.g., of form http://where.yahooapis.com/v1/places.q('city
name');count=0?format=json) and that the returned places object now has the
place indices as strings.

This requires code to be changed from, for example, result['places']['place'] to result['places'] and also requires that numeric indexed loops be changed to use string indices.

It's quite baffling that a change like this (which, really, isn't even necessary) was made and not communicated. Even more so considering that the API is versioned properly (you access it from /v1/), so a change like this should really have gone into (/v2/).

I would love to hear from someone on the Yahoo! GeoPlanet team about the rationale behind this change and where we can find out about similar changes in the future.

I love the Yahoo! GeoPlanet API -- it is awesome and very simple to work with -- but please, guys, pay a bit more attention to backwards compatibility, communicate better, and don't break existing apps!

The Yahoo! GeoPlanet API makes backwards-incompatible change, keeps it secret? article by Aral Balkan, unless otherwise expressly stated, is licensed under a Creative Commons Attribution-Noncommercial 2.0 UK: England License.