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get multiple values from leveldb
This module currently only supports simple string keys. As leveldb supports complex key types, it would be nice to also support them here.
I can put together a PR that uses a Map
to represent the return values, if that is something you would be interested in let me know.
Example:
mget(db, [['namespace', 'key']], function (err, vals) {
console.log(vals); // Map{['namespace', 'key']: 'value'}
});
Having only one error returned seems inconsistent when a NotFound
error, which is most likely a "soft error", is treated just like a "real error". What do you think about adding handling for NotFound
errors where the error is not set, but the value is set to undefined?
Consider this case:
NotFound
The result of this sequence is a single NotFound
error, and the other more important error being discarded silently. Thus hiding a race condition in your code, and a difficult to debug scenario.
The solution above will still swallow an error, but atleast it will not be the more common "soft error" case of a key not found.
Another more comprehensive solution, would be to accumulate all the errors, and make them come back as null || Map
, where the key is set to the error in the map.
Thought?
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