Add some debugging information if needed

[anton-107]

Right now i'm keep getting "not_found" error when i call Data.Graph.fetch() method.

How am i supposed to see what actually is going on? What query is sent to CouchDB? It would be nice to request this kind of output in ie. .setAdapter() method

[michael]

I'm working on a full rewrite of the the CouchAdapter that will be ready with Data.js 0.3.0. The current adapter is just a rough implementation to test the API against. They way queries are working doesn't scale at all (a new view is created for every new combination of query parameters). So it's not recommended to consider 0.2.0 for a production environment — at least not for querying. I'll try to make query execution transparent and debuggable in the new version.

With 0.3.0 I'll be adding support for:

• Indices (Primary key)
• Constraints (unique properties, referential integrity, etc.)

Queries then will be much faster because they're a based on explicit indices (which conforms to the nature of CouchDB).

In the meanwhile please use regular CouchDB views for querying, build subgraphs and merge them yourself.

See https://github.com/michael/substance/blob/master/server.js#L172