CODEWITHSUNDEEP
firebasegoogle-cloud-functions
Slavik N
Slavik N

Reputation: 5308

Firebase function: check if multiple keys exist

Is there a short/efficient way to check if multiple keys exist (even better if I can read several keys in a single call)? The only way I manage to achieve a similar result is by checking if key1 exists, .then check if key2 exists etc. Make it very ugly if I have 5 keys to check. The keys are in completely different locations, so I don't want to just get the common ancestor and read the snap, as it's too much data.

Upvotes: 0

Views: 89

Answers (1)

Doug Stevenson
Doug Stevenson

Reputation: 317562

Check all the keys without using then(), but collect all the promises into an array (I'll call it promises), then use Promise.all(promises) to get another promise that's resolved after all the others resolve. They can now potentially execute in parallel without having to wait for each other.

Upvotes: 2

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