I want to make an API call where I use the same params over and over again like here: data/?frequency=annual&data[0]=value&facets[activityId][]=1&facets[activityId][]=2&facets
But create Object only takes one facets[productId] as a parameter - no duplicate. Any idea how I can achieve this? Other than that the call works fine.
You would need to make that HTTP call differently, as the query connector expects an object, and objects cannot contain duplicate properties. An alternative approach would be using code with the Backendless.Request API:
Alternatively, any other way to make an HTTP request in JS would work too.