Problem converting app to null safety

[jerry hamby]

I just have one issue left and I can’t find an answer anywhere.

——— problem code ——— snapshot.data has a red line

The argument type 'Object? Function()' can't be assigned to the parameter type 'Map<String, dynamic>'.

Record.fromMap(Map<String, dynamic> map, {required this.reference})

      : assert(map['firstname'] != null),

        assert(map['accountid'] != null),

        firstname = map['firstname'].toLowerCase(),

        accountid = map['accountid'];

  Record.fromSnapshot(DocumentSnapshot snapshot)

      : this.fromMap(snapshot.data, reference: snapshot.reference);

I’m looking for links or sample code. 

PS- this code worked before null safety

[Suzuki Tomohiro]

Does the error message make sense to you?

If not, can you check the followings:

- What’s the data type of snapshot.data?

- What’s the data type this.fromMap takes?

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[jerry hamby]

After looking deeper in the problem, the class and page that required this fix is not used

by my app, so I deleted both of them which fixed the issue. Still don’t understand the issue, but one

problem solved.

I think this code got into my app very early in my learning process, null safety just exposed the issue.

[wa...@clinicianfirst.com]

For those seeing this problem,  who can't delete the offending pages, see this migration guide:

https://firebase.flutter.dev/docs/firestore/2.0.0_migration/

This helped me work through my issues.