Any good tools for visualizing datomic schemas?

Or maybe a quick explanation why ppl wouldn’t normally want that?

or maybe its so simple that it goes without saying lol

https://github.com/felixflores/datomic_schema_grapher

clojure.lang.ExceptionInfo: Transactor request timed out {:db/error :peer/request-timed-out, :request :create-database, :result #object[java.lang.Object 0x5d32f5db "java.lang.Object@5d32f5db"]}

Got this error when try to create-database?

What use of port 4334,433,4336 respectively?

hello! how can you excise an entity when using datomic cloud api? is there something similar to db/excise?

no excision is supported on Cloud as far as i know, @georgiana.mania

thanks @robert-stuttaford. I was hopping that they would support it.. because otherwise it can no longer be used to store data of EU citizens 😞

@georgiana.mania see: https://forum.datomic.com/t/support-for-excision-or-similar/323

low priority, but there is a dangling closing square bracket on this code example in the docs: https://docs.datomic.com/on-prem/best-practices.html#set-txinstant-on-imports

I have data in MongoDB, and a script to generate a Datomic schema and migrate it and the data into Datomic. But if I run the script twice, it creates twice the entities because of auto-ids when transacting maps. How best to modify my script to ignore entities that already exist in Datomic?

I'm just getting started, and could use some help. I have a database available, and I have created a simple app to run a query. Currently, it just runs a hard-coded query. How do I create Datalog queries dynamically?

@alex438 You may want to watch Stu’s talk on ETL and Datomic for inspiration: https://www.youtube.com/watch?v=oOON--g1PyU https://github.com/stuarthalloway/presentations/wiki/Simplifying-ETL-with-Clojure-&-Datomic

and the resulting importer: https://github.com/Datomic/mbrainz-importer

The key is to make the import idempotent, so that it can resume wherever it left off

The specifics of how you do that will depend on your particular data source and schema

Sounds almost impossible with complicated nested objects

I make use of isComponent

I’ve watched the video, I don’t remember anything addressing my problem beyond “query for things, detect differences, and insert/update appropriately “, but that doesn’t answer my question.

it shouldn’t be if you have a unique identifier of some sort

there can’t be a unique identifier for components

because they’re only unique by virtue of their parent

i mean for your parent ‘object’ in the source dataset

one thing that particular ^ import job does is key individual transactions with a UUID

I can do that, sure. Each top-level entity has an existing ID from the source db

then you can ask for any given transaction whether you’ve asserted it before or not

in particular, I believe that is done here https://github.com/Datomic/mbrainz-importer/blob/5d2d90f9a35789824675a4cc86a9a433527cb41b/src/datomic/mbrainz/importer.clj#L261

I guess that’s what I’m missing. I’ll think about that and see where it gets me, thanks

sure

also, here is the bit that looks at an existing import in-progress to find things that have already been completed https://github.com/Datomic/mbrainz-importer/blob/master/src/cognitect/xform/batch.clj#L46

in the context of a transduction

someone else has problems with datomic restore on dynamodb (throughput exception)

This looks like a typo at the beginning of this paragraph in the docs: https://docs.datomic.com/on-prem/transactions.html#list-forms

Also, there's the same typo in the next paragraph "Map forms"

@adamfrey not a typo, just somewhat awkward wording

Each list (contained within a) transaction represents…

oh I see now. That was a misreading on my part