bcomnes / level-auto-index Goto Github PK

Hi! I found this module recently and I think its great!
I was using level with promises (async/await) and then I try to use AutoIndex. But quickly noticed something went wrong with level-hookdown, I get this output after a db.put(...):

node_modules/level-hookdown/index.js:60
      cb(err)
TypeError: cb is not a function

So I try calling the level methods using callbacks and everything works.
Would you consider a PR for handling promises support? Maybe you could give some hints on the level-auto-index code base, where to start and that.

Thanks in advance!

Does level-auto-index support aggregating multiple keys/object under a single index lookup?

For example, a chat app:
A message belongs to a room
I want an index by which I can look up all the messages in the same room

I have not been able to figure out how to do that with level-auto-index

Version 1.2.5 of memdown just got published.

This version is covered by your current version range and after updating it in your project the build failed.

As memdown is “only” a devDependency of this project it might not break production or downstream projects, but “only” your build or test tools – preventing new deploys or publishes.

I recommend you give this issue a high priority. I’m sure you can resolve this 💪

Your Greenkeeper Bot 🌴

According to the documentation createKeyStream and createValueStream should use the indices as keys and the indexed values as values. However in reality it uses the keys of the original db on which the index has been created.

const autoLevelIdx  = require("level-auto-index");
const level         = require("level-mem");
async function printStream(text, stream, print) {
    await new Promise((res) => {
        stream.on("data", e => text += " | " + print(e));
        stream.on("end", res);
    });
    console.log(text);
}
(async function() {
    const db     = level();
    const byTitle = autoLevelIdx(db, level(), val => val);
    await Promise.all([db.put("A", "X"), db.put("B", "Y"), db.put("C", "Z")]);
    await printStream("ReadStream", byTitle.createReadStream(),  ({key, value}) => `${key}: ${value}`);
    await printStream("KeyStream",  byTitle.createKeyStream(),   (key) => key);
})();

According to the documentation this code should output:

ReadStream | X: X | Y: Y | Z: Z
KeyStream | X | Y | Z

In reality it generates the following output:

ReadStream | A: X | B: Y | C: Z
KeyStream | A | B | C