On Facebook's platform, using the Graph API, how can I request default fields + one or two field expanded fields, without having to explicitly request each default field?
As far as I can tell, as soon as you field expand a single field, it overrides all the default fields.
Being able to say, ?fields=default_fields,comments.limit(10).summary(true) would be amazing, considering how often fields change and how most objects have little overlap in the fields available on them.
It is not possible to specify fields in addition to the default.
By specifying a field, you're indicating your preference to limit (or expand) the specific data you want. As such, the defaults are overridden and you need to specify each field you want to get back.