Using queryStrings with arrays

[AlanFoster]

Hey;

Just a quick question about the serialization for array query strings within fluxthis.

We're currently attempting to send an array via the params option of the ApiActionCreators.
Over the wire I would have expected this format:

items[]=uuid1&items[]=uuid2

Currently it is serialized as:

items[0]=uuid1&items[1]=uuid

Rails, Express, and PHP currently rely on the first format to identify a query string param as an array. However, if I understand correctly there is currently no formal specification for this.

My thoughts are:

• We could update flux to support the 'more common' convention of arrays, however this would most likely be a Backwards incompatible change for some individuals
• Allow fluxthis ApiActionCreators to be configured with an appropriate query string serializer, as this would allow for ApiActionCreators to handle each specific server's definition of Arrays/Nested objects etc within a query string

I think the best approach would be option 2. Any thoughts on a PR which provides a configurable implementation of makeQueryString ?

[mako-taco]

Option 2 sounds great!