In my Rails app, I'm making client-side JavaScript calls to
google.maps.Geocoder().geocode(). If geocode() returns multiple
addresses, I let the user choose one and pass that one back to the
server as a JSON encoded string for additional processing. It all works
fine.
But recently, I noticed that fields previously labeled 'lat' and 'lng'
are now appear to be labeled 'ra' and 'sa':
{"types"=>["street_address"],
"formatted_address"=>"1600 Amphitheatre Pkwy, Mountain View, CA 94043,
USA",
"address_components"=>[...],
"geometry"=>{"location"=>{"ra"=>37.422782, "sa"=>-122.085099},
"location_type"=>"ROOFTOP", "viewport"=>...}}
My hunch is that the corresponding javascript lat and lng accessors
still work properly, and that a self-respecting Google engineer would
tell me that I should be using the supplied JavaScript accessors
instead of reading the data structure directly.
But: I need to access these fields in my server app. Being somewhat new
to all this, I don't know how to call JavaScript accessors from within
Rails code.
So the questions:
- am i simply nuts? have the lat and lng fields been named "ra"
and "sa" all along?
- is my hunch correct that Google developers can make any changes they
want to the JSON data structure, as long as the published accessors
function as advertised?
- I saw no mention in the changelog about the renaming of the fields.
can I count on these field names staying constant for a while?
This is all pretty academic: If I cannot rely on the JSON structure
being constant, I always have the option of extracting only the fields
I need on the client side using published JavaScript accessors and
sending them to my server. But until I know what fields I really need,
it would be nice to send over the entire JSON structure.
Thoughts?
- ff
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