“Copy” might have been a little too sloppy an expression on my part; apologies if it was misleading somehow.
I could think of two general approaches – I haven’t examined either of them, so please verify them on your end; there might well be a better approach.
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Use
filter-fnand create a custom command that wrapsorg-roam-node-read
In the custom wrapper command, you can pass your custom filter function toorg-roam-node-readviafilter-fnargument.
To me, a key question to be answered is, can you programmatically inspect each node and tell refs vs others. I guess yes, but I’m not sure.
One obvious disadvantage would be performance. The program would get all the nodes including ref nodes first, then examine each of them, and finally filter out ref nodes. Dealing with a large volume of notes might result in noticeably slow performance. -
My “copy” idea.
org-roam-node-findis a very standardized small command, so it is rather easy to copy or create a wrapper for. It seems to come with a caching mechanism, so you would want to keep it. The actual SQL statement is written inorg-roam-node-list. The idea is to have a custom node-list function with your own SQL statement, and somehow swap them when you want it.
The key investigation is to determine how you can achieve this swapping mechanism. My guess is that you could usecl-letfto temporarily replace the call toorg-roam-node-listwith your custom function. @arozbiz has shared a smart use ofcl-letfin his post. I believe the same idea could be applied in this case, too.