Use batch requests in get_objects

[vionemc]

I want to make a bulk request using get_objects, but if some of the ID doesn't exist, even though other IDs exist, the whole bulk request fails. It's annoying.

When I run this: graph.get_objects(ids=['maxlibin','upwork', 'watcfy'])
Currently I'll just get error 803
facebook.GraphAPIError: (#803) Cannot query users by their username (maxlibin)

I hope you'll give response like:

{
'maxlibin': '(#803) Cannot query users by their username (maxlibin)',
'upwork':{}, #The successful result
'watcfy':{} #The successful result
}

[martey]

Since this is partially a problem with the Graph API and not this particular library, I was going to advise you to report this upstream, but I see you already did at https://developers.facebook.com/bugs/1000666673351426/.

Facebook's suggestion to use batch requests is what I would have suggested as well. Feel free to submit a pull request making changes to get_objects.

[vionemc]

OK! Well, I hope Facebook Team will hear my suggestion in the future. It will be nice to save rate limit

[vionemc]

I don't think it's a good idea to change get_objects to batch request. Like what I said before, rate limit problem.

[martey]

Closing, since adding support for batch requests to get_objects is a duplicate of #28 (which shouldn't cause rate limiting unless you are using the API in a way that Facebook does not like).