Firestore check if array in specific document contains a value

Question

I would like to check if the array "devices" which is in the document "SOjTxEjMwb71isiiPnR8" contains the value "AE0EBAFA-1560-404B-A3DA". I just want to know this specific array in the specific document. Because it can be that the same value in the same array occurs in another document. How do I have to do this in Swift? Thanks a lot for your help.

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Frank van Puffelen · Accepted Answer · 2021-07-08 12:38:01Z

3

You're looking for the array-contains operations, which in Swift looks like this:

devicesRefRef
  .whereField("devices", arrayContains: "AE0EBAFA-1560-404B-A3DA")

You can then get the results once or listen for realtime updates. You'll note that all links I provide are to the relevant sections of the documentation, so I recommend spending some time there.

answered Jul 8, 2021 at 12:38

Frank van Puffelen

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