How do we define Queries?

[gnarf]

We need to take a look at and audit/document in detail how we define a query for .find(), and how we match against those queries (to look for good extension use cases).

[gnarf]

Currently I think we are taking an object and basically doing an _.where() with it.

We might want to take a look at finding some better way to define these queries that can be abstract enough to use both with Remote style sources (JSON API / Firebase / Etc) and Memory style sources.

Could we abstract the actual "matching" functions into something like Source.prototype.where( type, query ) (currently basically _filter) allowing people to add/support more complex query language? Like say, MongoDB style { $or: [ { }, { } ] }

[opsb]

I've been looking at rethinkdb recently and they have an interesting functional query api, https://rethinkdb.com/docs/introduction-to-reql/. I'm not suggesting that we support everything that it can do but it's useful to look at when considering what a query language might be capable of expressing.

[dgeb]

Query expressions and builders have now been fully defined in @orbit/data and documented here http://orbitjs.com/v0.15/guide/querying-data.html