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paulerickson/removeExpiredElementsFromCollection.lua

Last active November 20, 2017 23:32
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Removes members from set if no corresponding key can be found (assuming "widgets" / "widget:99" naming convention)
Raw
removeExpiredElementsFromCollection.lua
local collectionKey = KEYS[1].."s"
local members = redis.call("smembers", collectionKey)
for _, id in ipairs(members) do
if redis.call("exists", KEYS[1]..":"..id) == 0 then
redis.call("srem", collectionKey, id)
end
end
return redis.call("scard", collectionKey)
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