Update model and serializer

arkindex/training/models.py

@@ -266,6 +266,7 @@ class Dataset(models.Model):
     name = models.CharField(max_length=100, validators=[MinLengthValidator(1)])
     description = models.TextField(validators=[MinLengthValidator(1)])
     state = EnumField(DatasetState, default=DatasetState.Open, max_length=50)
+    unique_elements = models.BooleanField(default=True)
 
     class Meta:
         constraints = [

arkindex/training/serializers.py

@@ -636,6 +636,7 @@ class DatasetSerializer(serializers.ModelSerializer):
             # Hidden field to set the creator as the authenticated user
             "default_creator",
             "task_id",
+            "unique_elements",
             "created",
             "updated",
         )