Cloud Firestore Nested arrays are not supported Error Flutter

Question

I'm trying to import json to my cloud firestore collection, which contains nested array, but even with FieldValue.arrayUnion function getting error "Invalid data. Nested arrays are not supported".

 FirebaseFirestore.instance
              .collection('universities2')
              .doc(value.docs.first.id)
              .update({
            'departments': FieldValue.arrayUnion([
              json["Sayfa1"][0][x]["department"][0]["name"],
              json["Sayfa1"][0][x]["department"][0]["fields"]
            ])
          });

Is there any way to implement this ?

JM Gelilio · Accepted Answer · 2021-03-15 05:32:58Z

1

In node.js using with spread operator(...) or .apply(this, array) is working, example:

 FirebaseFirestore.instance
              .collection('universities2')
              .doc(value.docs.first.id)
              .update({
            'departments': FieldValue.arrayUnion(...[
              json["Sayfa1"][0][x]["department"][0]["name"],
              json["Sayfa1"][0][x]["department"][0]["fields"]
            ])
          });

or

 FirebaseFirestore.instance
              .collection('universities2')
              .doc(value.docs.first.id)
              .update({
            'departments': FieldValue.arrayUnion.apply(this, [
              json["Sayfa1"][0][x]["department"][0]["name"],
              json["Sayfa1"][0][x]["department"][0]["fields"]
            ])
          });

edited Mar 15, 2021 at 5:32

answered Mar 11, 2021 at 8:23

JM Gelilio

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1 Comment

JM Gelilio Over a year ago

Let me know if this answer is also working in Flutter.

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