I want to make a field in firestore document to be null like lastEventApproval
field in the image above.
I try to create a document by using the code below
let data = ["lastEventApproval" : nil , other data here .....]
batch.setData(userDictionary, forDocument: ref)
so I want to make when I successfully create a document, there is a field called lastEventApproval
and the value is null like the image above
but the result is....
that lastEventApproval
doesn't exist if I use that code. like this
in Android, I can make something like that using this code
val data = hashMapOf("lastEventApproval" to null)
batch.set(ref,data)
but I don't know why it doesn't work in iOS swift, maybe I need to asign other value than nil?
so how to make a field in firestore document to be null in swift?
If you want to actually write a null to use as a placeholder (for example) it's just this
func writeNull() {
let collRef = self.db.collection("test_collection")
let data: [String: Any] = [
"key": "value",
"key1": NSNull()
]
collRef.addDocument(data: data)
}
and the result
This also works
func writeNull() {
let collRef = self.db.collection("test_collection")
let data: [String: Any?] = [
"key": "value",
"key1": nil
]
collRef.addDocument(data: data)
}
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