"Null check operator used on a null value" during update.replace call about drift

[simolus3]

Be careful with that, I think it would update all tasks and apply the finished: false column to every row. If the task has a non-null id then the copyWith/replace call should work.
You could also do (update(tasks)..whereSamePrimaryKey(task)).write(TasksCompanion(finished: state)) - but again, only if task.id is not null.

[simolus3]

The only null value that I see during debug is the id(because we do copyWith)

So to be sure, you're calling replace with a Task object that has its id field set to null? That would explain the error, but I don't think drift can do much against that (except giving a better error message). Tasks are identified by their id and we need to know which task to replace, but we can't do that if id is null.

[simolus3]

Thanks for the report! Do you have an empty primary key? Could you post the definition of the Tasks table as well?

[kirqe]

I slightly updated the table names but the structure is basically the same
During task.copyWith the original task has the id

import 'package:json_annotation/json_annotation.dart' as ja;

@UseRowClass(Task)
class Tasks extends Table {
  IntColumn get id => integer().autoIncrement()();

  IntColumn get orderId => integer().references(Orders, #id, onDelete: KeyAction.cascade)();

  BoolColumn get finished => boolean().withDefault(const Constant(false))();
}

@ja.JsonSerializable()
class Task implements Insertable<Task> {
...

The "tasks" are fetched from api and saved like this

final Set<TasksCompanion> tasksCompanions;

tasks.forEach((taskJson) {
        tasksCompanions.add(Task.fromJson({
          'order_id': orderJson['id'],
          'finished': false
        }).toCompanion(true));
      });

... call daos

I checked the state. The items are being saved with no issues

[kirqe]

You're right. This works. Thank you!

 Future<void> toggleFinish(Task task, bool state) {
    return update(tasks)
        .write(TasksCompanion(finished: state));
  }

edit: oh, I meant where task, passing the existing task -___-

Another option is to search through other fields. update.where.write