Joel Bradshaw 482005f304 Update preview image generation to only query ids ... Previously we were querying the full book objects just to get a list of id's, which is much slower and also takes a lot more memory, which can cause the process to be killed on memory-limited machines with a large number of books. Instead, since we're just dispatching jobs here, we can just ask for the id's, which is faster and much more practical memory-wise. The map is a little annoying, I didn't see a way to directly get just a list of the value of one field, so we have to get a list of dictionairies with one key and then pull that key out. Whatevs.		2022-06-05 13:07:44 -07:00
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commands	Update preview image generation to only query ids	2022-06-05 13:07:44 -07:00