Datomic Cloud DB name with slash causes exception


If I try to connect to a db with a name containing a slash /, I get an exception. This feels like a bug. I am able to name DBs with a / in Datomic on-prem.

(d/create-database client {:db-name "foo"})
=> true
(d/create-database client {:db-name "foo/bar"})
=> true
(d/connect client {:db-name "foo"})
=> {:db-name "foo", :database-id "55e543d1-14f0-4c9a-b3a9-8fa089a730e9", :t 3, :next-t 4, :type :datomic.client/conn}
(d/connect client {:db-name "foo/bar"})
clojure.lang.ExceptionInfo: Datomic Client Exception
clojure.lang.Compiler$CompilerException: clojure.lang.ExceptionInfo: Datomic Client Exception {:cognitect.anomalies/category :cognitect.anomalies/forbidden, :datomic.client/http-result {:status nil, :headers nil, :body nil}}, compiling:(form-init3645246680023467651.clj:1:16)

We like to name DBs with a / so you can simply pass the DB name to the keyword function, creating a namespaced keyword from it. I could not locate any documentation saying certain characters are prohibited. Is this a bug?


Thanks Kenny, we’ll document the legal characters.


As noted here, the System Name must be “Use only lowercase letters, numbers, and hyphens. Your system name gets concatenated in various contexts and so should be kept short, e.g. fewer than 24 characters.”



This was in reference to a Datomic DB name, not a Datomic system name.


I’ll make sure we add that to the docs.