Removing entities can be achieved with (dissoc db (ref-to db my-entity)).
This is undocumented and it is a subtle operation, because:
It will leave dangling refs in entities who join my-entity
During query parsing pull ignores refs and colls of refs that do not resolve
Essentially using pull gives the expected result, but the db is an inconsistent state.
If db-level consistency is desirable, we could maintain an index during add and remove that'd allow a fast reverse lookup on the removed ref, to the refs and attributes pointing to it:
{<ingress-ref> {<egress-ref> <from-attr>}}
This would give us a add and remove operations in time linear to the number of joins.
Removing entities can be achieved with
(dissoc db (ref-to db my-entity)).This is undocumented and it is a subtle operation, because:
my-entitypullignores refs and colls of refs that do not resolvepullgives the expected result, but the db is an inconsistent state.If db-level consistency is desirable, we could maintain an index during
addandremovethat'd allow a fast reverse lookup on the removed ref, to the refs and attributes pointing to it:{<ingress-ref> {<egress-ref> <from-attr>}}This would give us a add and remove operations in time linear to the number of joins.