Can't get project by slug as Projects instance parse fails

[XaverStiensmeier]

Description

Executing:

from taiga import TaigaAPI
api = TaigaAPI()
api.auth(username=USERNAME, password=PASSWORD)
project = api.projects.get_by_slug(PROJECT_SLUG)

I get:

Traceback (most recent call last):
  File "/home/xaver/Documents/Repos/taigaRESTInteraction/create_usertickets.py", line 22, in <module>
    project = api.projects.get_by_slug(PROJECT_SLUG)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/xaver/Documents/Repos/taigaRESTInteraction/venv/lib/python3.12/site-packages/taiga/models/models.py", line 1803, in get_by_slug
    return self.instance.parse(self.requester, response.json())
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/xaver/Documents/Repos/taigaRESTInteraction/venv/lib/python3.12/site-packages/taiga/models/base.py", line 199, in parse
    entry[key_to_parse] = cls_to_parse.parse(requester, entry[key_to_parse])
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/xaver/Documents/Repos/taigaRESTInteraction/venv/lib/python3.12/site-packages/taiga/models/base.py", line 107, in parse
    for entry in entries:
TypeError: 'NoneType' object is not iterable

It's not like entries = [None] or something, but more that the parsers gets (last lines before error) see below. Logging format print("Entry {line of code in base.py where the print is placed}", entry):

Entry 106: [{'id': 9688125, 'name': 'Wartend', 'order': 1, 'is_closed': False, 'project_id': 1599549, 'color': '#70728F', 'wip_limit': None, 'slug': 'wartend', 'is_archived': False}, {'id': 9688126, 'name': 'In Bearbeitung', 'order': 2, 'is_closed': False, 'project_id': 1599549, 'color': '#51CFD3', 'wip_limit': None, 'slug': 'in-bearbeitung', 'is_archived': False}, {'id': 9688127, 'name': 'In Verzug', 'order': 3, 'is_closed': False, 'project_id': 1599549, 'color': '#E44057', 'wip_limit': None, 'slug': 'in-verzug', 'is_archived': False}, {'id': 9688129, 'name': 'Done', 'order': 5, 'is_closed': True, 'project_id': 1599549, 'color': '#A8E440', 'wip_limit': None, 'slug': 'done', 'is_archived': False}, {'id': 9688130, 'name': 'Archived', 'order': 6, 'is_closed': True, 'project_id': 1599549, 'color': '#A9AABC', 'wip_limit': None, 'slug': 'archived', 'is_archived': True}]
Entry 196 {'id': 9688125, 'name': 'Wartend', 'order': 1, 'is_closed': False, 'project_id': 1599549, 'color': '#70728F', 'wip_limit': None, 'slug': 'wartend', 'is_archived': False}
Entry 196 {'id': 9688126, 'name': 'In Bearbeitung', 'order': 2, 'is_closed': False, 'project_id': 1599549, 'color': '#51CFD3', 'wip_limit': None, 'slug': 'in-bearbeitung', 'is_archived': False}
Entry 196 {'id': 9688127, 'name': 'In Verzug', 'order': 3, 'is_closed': False, 'project_id': 1599549, 'color': '#E44057', 'wip_limit': None, 'slug': 'in-verzug', 'is_archived': False}
Entry 196 {'id': 9688129, 'name': 'Done', 'order': 5, 'is_closed': True, 'project_id': 1599549, 'color': '#A8E440', 'wip_limit': None, 'slug': 'done', 'is_archived': False}
Entry 196 {'id': 9688130, 'name': 'Archived', 'order': 6, 'is_closed': True, 'project_id': 1599549, 'color': '#A9AABC', 'wip_limit': None, 'slug': 'archived', 'is_archived': True}
Entry 106: []
Entry 106: None

Steps to reproduce

from taiga import TaigaAPI
api = TaigaAPI()
api.auth(username=USERNAME, password=PASSWORD)
project = api.projects.get_by_slug(PROJECT_SLUG)

Versions

• Python 3.12.3
• I don't think I have django installed at least I can't import it python -c "import django; print(django.get_version())"
• What application version do you mean? I installed python taiga via the pip command on Ubuntu24.04

Expected behaviour

Get the project - while I get a correct JSON response, the error occurs while interpreting it.

Actual behaviour

I get an error saying that entries can't be iterated.

Additional information

The JSON response looks correct. It is just the interpreting that throws the error. I will try to debug this further on my machine.

Fix?

I have just changed the ListResource method to:

@classmethod
    def parse(cls, requester, entries):
        """Parse a JSON array into a list of model instances."""
        print("Entry 106:", entries)
        result_entries = SearchableList()
        for entry in entries or []: # changed to handle the None case
               result_entries.append(cls.instance.parse(requester, entry))
        return result_entries

not sure if that's a good way to handle it, but it seems to work for my needs for now.

[annaerdi]

Had the same issue, thanks for the quick fix @XaverStiensmeier!

[Daschi1]

Thank you, @XaverStiensmeier, for identifying this issue and providing a fix! I encountered the same problem, and your solution worked perfectly for me.