Feature Request: Basic caching support

[randomiser]

Hi Ilya,

It would be really useful to have a simple mechanism to support caching. For example for SQL data that rarely changes but needs to be loaded often within the graph.

Thinking the r.model could be changed to support this with additional methods something like:

// return string | undefined
cacheKey = (context) => undefined;

// return existing data | query
preFetch = (context, query, cacheKey) => query;

// callback to potentially store in cache
postFetch(context, data, cacheKey) {}

With changes to the r.graph to support the above.

Keen to hear any thoughts.

Kind regards,
Matt

[IlyaSemenov]

Thanks for the idea. Technically, I suppose this could already be achieved with query callback and then hacking into Objection lifecycle, but simplified first-class support could be worthy. I'll look into this.

[randomiser]

Thanks! That'd be great.