These labels still exist in annotations error

Getting These labels still exist in annotations error when trying to delete object classes in labeling interface even though all objects of this class were removed.

Tried using label-studio filter by “annotations results” and also made a direct SQL-query select * from task_completion tc where "result" LIKE '%cage%' to check that there are no more annotations of that class.

Restarting label-studio doesn’t help.

Environment:

• OS: Ubuntu 20.04
• Label Studio Version 1.0.0-post3

[1ytic]

Could you try these steps to reproduce the issue:

1. Create an empty project and feed the two tasks
2. Label two tasks with different labels
3. Try to remove one of tasks with annotation
4. Try to change labels in the settings

Current behaviours:

a) In previous release like this one heartexlabs/label-studio@sha256:95232dfce519ce13b7e6aebf118242817f999bff2ba17ebbaff295199a12a506 Label Studio will silently remove the task, but will prevent changes for labels

b) In latest release like heartexlabs/label-studio@sha256:e048d8df494e0e4b08ce7a928705a4f6d2178b717ddd2cd2ecef333ad2e0d7ba Label Studio will show this Runtime Error:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/dist-packages/django/db/models/fields/related_descriptors.py", line 173, in __get__
    rel_obj = self.field.get_cached_value(instance)
  File "/usr/local/lib/python3.8/dist-packages/django/db/models/fields/mixins.py", line 15, in get_cached_value
    return instance._state.fields_cache[cache_name]
KeyError: 'task'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/dist-packages/rest_framework/views.py", line 506, in dispatch
    response = handler(request, *args, **kwargs)
  File "/usr/local/lib/python3.8/dist-packages/django/utils/decorators.py", line 43, in _wrapper
    return bound_method(*args, **kwargs)
  File "/label-studio/label_studio/data_manager/api.py", line 393, in post
    result = perform_action(action_id, project, queryset, request.user, **kwargs)
  File "/label-studio/label_studio/data_manager/actions/__init__.py", line 108, in perform_action
    raise e
  File "/label-studio/label_studio/data_manager/actions/__init__.py", line 104, in perform_action
    result = action['entry_point'](project, queryset, **kwargs)
  File "/label-studio/label_studio/data_manager/actions/basic.py", line 53, in delete_tasks
    queryset.delete()
  File "/usr/local/lib/python3.8/dist-packages/django/db/models/query.py", line 747, in delete
    deleted, _rows_count = collector.delete()
  File "/usr/local/lib/python3.8/dist-packages/django/db/models/deletion.py", line 435, in delete
    signals.post_delete.send(
  File "/usr/local/lib/python3.8/dist-packages/django/dispatch/dispatcher.py", line 177, in send
    return [
  File "/usr/local/lib/python3.8/dist-packages/django/dispatch/dispatcher.py", line 178, in <listcomp>
    (receiver, receiver(signal=self, sender=sender, **named))
  File "/label-studio/label_studio/io_storages/s3/models.py", line 224, in delete_annotation_from_s3_storages
    project = instance.task.project
  File "/usr/local/lib/python3.8/dist-packages/django/db/models/fields/related_descriptors.py", line 187, in __get__
    rel_obj = self.get_object(instance)
  File "/usr/local/lib/python3.8/dist-packages/django/db/models/fields/related_descriptors.py", line 154, in get_object
    return qs.get(self.field.get_reverse_related_filter(instance))
  File "/usr/local/lib/python3.8/dist-packages/django/db/models/query.py", line 429, in get
    raise self.model.DoesNotExist(
tasks.models.Task.DoesNotExist: Task matching query does not exist.

Example of label config:

<View>
  <Labels name="words" toName="view">
    <Label value="Word1" alias="W1"/>
    <Label value="Word2" alias="W2"/>
  </Labels>
  <Text name="view" value="$description1"/>
</View>

Example of creating tasks:

import requests

address = "http://localhost:8081"
token = "xxx"
headers = {"Authorization": f"Token {token}"}

data = {
    "version1": "1",
    "description1": "long text"
}

payload = {
    "data": data,
    "project": 1,
}
response = requests.post(address + "/api/tasks/", json=payload, headers=headers)
print(response.json())

[csaroff]

This appears to be fixed as of v1.4.1post1(didn’t try rc0).

Thanks @makseq!