hi i want to do this but got the issue
(d/q '[:find ?city ?point
:where
[?e :city ?city]
[?e :location ?location]
[(clojure.core/apply geo.spatial/point ?location) ?point]]
(d/db conn))
:message "Cannot invoke \"clojure.lang.IFn.applyTo(clojure.lang.ISeq)\" because \"f\" is null"
it seems it can not find my loaded librarythx for filing the issue
Sorry to ask you again , so this means data levin is kind of in-memroy database & always loads all the stored in the memory like datascrip?
No. LMDB works by mmap files. It is always on disk, there's no memory only mode in Datalevin.
So I'll use DataLevin for my new projects instead of good old postgres
Feel free to ask any questions.
i also put full namespace like this & still get the same issue actual.geo.spatial/point
This works
(d/q '[:find ?city ?point
:where
[?e :city ?city]
[?e :location ?location]
[(first ?location) ?lat]
[(second ?location) ?lon]
[(spatial/point ?lat ?lon) ?point]]
(d/db conn))Please file an GitHub issue, In clojure, apply is a function, so we probably need to support it.
ok thank you