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nietaki/medium_preload_on_structs.ex

Created October 15, 2019 21:36
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medium_preload_on_structs.ex
simpler_query = from(c in Comment, where: c.user_id == ^charlie_id)
non_preloaded = Repo.all(simpler_query)
assert Enum.all?(non_preloaded, fn c -> c.post == nil end)
comments_by_charlie = Repo.preload(non_preloaded, [:post])
refute Enum.any?(comments_by_charlie, fn c -> c.post == nil end)
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