How to combine Graph API field expansions?

Question

When using this syntax to query multiple metrics

https://graph.facebook.com/v2.4/69999732748?fields=insights.metric(page_fan_adds_unique,page_fan_adds,page_fan_adds_by_paid_non_paid_unique)&access_token=XYZ&period=day&since=2015-08-12&until=2015-08-13

I always get data for the last three days regardness of the values of the since and until parameters

https://graph.facebook.com/v2.4/69999732748/insights/page_fan_adds_unique?period=day&access_token=XYZ&since=2015-09-10&until=2015-09-11

If I ask for a single metric, then the date parameters have effect.

Is there a different syntax for requesting multiple insights metrics which will accept the date parameters?

Answer 1

I think this should work:

curl -G \
-d "access_token=PAGE_TOKEN" \
-d "fields=insights.metric(page_fan_adds_unique,page_fan_adds,page_fan_adds_by_paid_non_paid_unique).since(2015-08-12).until(2015-08-13).period(day)" \
-d "pretty=1" \
"https://graph.facebook.com/v2.4/me"

You are requesting the page's insights as a field. This field contains a list of results in a data array (insights.data), and you want to filter this array.

The way to do that is by chaining parameterizations to the requested insights field like so:

fields=insights
  .filter1(params)
  .filter2(params)
  .filter3(params)

Each .filterX(params) will be applied to the particular field that precedes it.
I've added newlines and indentation for clarity, but in your actual request you'd chain them all in a single line, without spaces.