Cannot find a way to catch Error: Another hypercore is stored here error

[aral]

When creating a new database, if you erroneously try to create a new database over an existing one, you get Error: Another hypercore is stored here. However, I can find no way of catching this error so that I can handle it gracefully when using hyperdb.

[m-onz]

Just fs.stat the DB folder before attempting to create the new db.

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On Sat, Feb 16, 2019, 10:23 Aral Balkan ***@***.*** wrote: When creating a new database, if you erroneously try to create a new database over an existing one, you get the Error: Another hypercore is stored here. However, I can find no way of catching this error so that I can handle it gracefully. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#164>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ANY6RmmcFPhd3IL-iA-o3NP67V4dcGBcks5vN9wngaJpZM4a-6hr> .

[aral]

@m-onz Sorry, I should’ve been more precise: this is with random-access-idb in the browser and, afaics, there doesn’t seem to be a reliable way to see if an IndexDB database exists or not (!!!)

[m-onz]

I've used hyperdb in the browser... Using substacks lib. The DB name creates a key from your DB name.. Surely you can check that exists. I think supplying the DB key as the second argument of the constructor each time might work too.

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On Sat, Feb 16, 2019, 17:01 Aral Balkan ***@***.*** wrote: @m-onz <https://github.com/m-onz> Sorry, I should’ve been more precise: this is with random-access-idb in the browser and, afaics, there doesn’t seem to be a reliable way to see if an IndexDB database exists or not (!!!) — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#164 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ANY6Rtr6KH6-dEgWsqpTRC_X4Cr3Jpb7ks5vODlPgaJpZM4a-6hr> .

[aral]

Regarding my previous point: https://stackoverflow.com/a/23767548

[joehand]

I was running into this too and decided to use the discovery key so you can store multiple dats:

var crypto = require('hypercore-crypto')
var db = require('random-access-idb')

var key = 'dat://somedatkey'

var discoveryKey = crypto.discoveryKey(key)
var archive = hyperdrive(db(discoveryKey.toString('hex')), key)

[m-onz]

Also, you could store your DB name in local storage or as a cookie.

Bit crude but its a work around.