#punkbandnames

@devth you can't change :db/valueType http://docs.datomic.com/schema.html#sec-5-3 I see somewhere, but not recommended: "If you really need to alter valueType, rename the attribute to a new ident, then create a new one with correct type"

does anyone use conformity? https://github.com/rkneufeld/conformity I have a question about it's purpose:

In a more general sense, conformity allows you to declare expectations (in the form of norms) about the state of your database, and enforce those idempotently without repeatedly transacting schema, required data, etc.

ooh! i do in fact use it

technically yes, but any transaction has side effects, even if they may be negligible or acceptable

i haven’t tested the ultimate effects, but you will leave a swath of extra transaction datoms behind if you just run your schema file on startup

it may also be true that some forms of schema migrations could be destructive and should never be repeated, although i have none of that type

maybe something like “ensure that this schema has exactly six entities with :user/admin” or something similarly contrived that you may not always want to be true, but may wish to ensure that a db starts with?

thanks @bbqbaron

no problem

@pbostrom shameless plug: you may want to check out the README of datofu (https://github.com/vvvvalvalval/datofu#managing-data-schema-evolutions) for a guide on migrations. HTH, feedback welcome

cool, thanks

The internals are essentially the same as conformity

is it possible to give a peer read only access?

i don’t think so; datomic didn’t have any permissioning notion last i checked

Hi all, trying to start up the console but I am getting: java.lang.IncompatibleClassChangeError. Any ideas? Using the demo pro version. The transactor is running System started datomic:

@aramz Are you using datomic FREE? There is a known issue with Datomic FREE and console. We’re working on a fix. If you register for Datomic starter (which is free to use) the Datomic PRO edition has no classpath issue with using console.

I was using the starter pro

what version?

datomic-pro-0.9.5561.50

hrm. I tested that yesterday and it started fine

what command are you running to start console?

as per the console readme, I’ve tried both: bin/console -p 8080 alias transactor-uri-no-db and bin/console -p 8080 mbrainz datomic:

hrm

might be worth trying a clean download/unzip of the distribution

does the pro already come with the console? I downloaded the console separately and ran the install-console

ah, yes

you’ll want to use the one packaged with pro

it is already in there

ah ok got it

thank you

sure

works!

:thumbsup:

@uwo maybe connect to the transactor then kill it :p

😄 @val_waeselynck