Implement query() and adding/removing indexes about relational-pouch

[nolanlawson]

@wujitouch Yeah, I think pouchdb-find integration needs to be implemented within this plugin itself.

[nolanlawson]

I'd like to explicitly expose some methods like:

db.rel.createIndex('foo', {field: 'foo'})
db.rel.deleteIndex('foo', {field: 'foo'})
db.rel.query({field: 'foo', value: 'bar'})

Or something like that.

[oliviertassinari]

👍 It would be great.
I had to expose fromRawDoc() on the public API to make a query.

[nolanlawson]

Actually nowadays it may make more sense to just directly plug into pouchdb-find and expose that in ember-pouch. However, I don't have much time for that project these days.

[vicpon]

I tried using pouchdb-find along side this plugin but since this one uses a "smart" ID for the document, pouchdb-find has trouble retrieving docs. I could have added the deserialize logic from this plugin but it turned out to be easier to work with the code without using both, so I just stuck with find.

[jlami]

I added parseRelDocs in my PR #61 which I needed for my own find query. Thought it might be a good idea to expose this to the outside.

One extra problem i realised when looking at the filters was that db.find in pouchdb-find does not filter on types. So filtering on an attribute date might give more than one type back. But most of the time you only want one type back. For the findHasMany query I do this with an extra selector for the id.

So maybe it is better to make our own version of the query and index functions, since we might also want to include the id between filter to select only documents of a certain type.