Please use the "contains element" condition instead for property "elementIds"; the plain "contains"condition is deprecated for string containers and will be removed in a future version

[techouse]

Basic info:

• ObjectBox version: 1.6.2
• Flutter/Dart SDK: Dart 2.18.2 + Flutter 3.3.5
• Null-safety enabled: yes
• Reproducibility: always
• OS: macOS 12.6
• Device: iPhone 13 Pro MAX running iOS 16.0.3

Steps to reproduce

1. Create a class field like

@Entity()
MyClass {
  MyClass({
    this.elementIds,
  });

  List<String> elementIds;
}

2. Query that field using

final List<MyClass> items = myClassBox.query(
    MyClass_.elementIds.contains('some_id'),
  ).build().find();

3. Run on an iPhone
4. See the deprecation message

[INFO ] Please use the "contains element" condition instead for property "elementIds"; 
the plain "contains"condition is deprecated for string containers and will be removed in a future version

Expected behavior

No deprecation warning.

I was expecting there to be some sort of "contains element" API for a List<String> but it doesn't seem so, as there is only

class QueryStringVectorProperty<EntityT>
    extends QueryProperty<EntityT, List<String>> {
  QueryStringVectorProperty(ModelProperty model) : super(model);

  Condition<EntityT> contains(String p, {bool? caseSensitive, String? alias}) =>
      _StringCondition<EntityT, List<String>>(
          _ConditionOp.contains, this, p, null, alias,
          caseSensitive: caseSensitive);
}

So that deprecation warning is kinda confusing.

[greenrobot-team]

Thanks for reporting! The warning is coming from the native database. The Dart API was not yet updated with the new condition. Keeping this open to track adding the containsElement condition for lists.

[greenrobot-team]

1.7.0 is out which adds the new containsElement condition.

Use flutter pub upgrade or dart pub upgrade to update.