I am creating an addon template functionality to the project module. I would like users to be able to select/change the template from the project form view, but in my onchange function for taskset_template_id it is throwing up an error when I try to delete existing tasks that were created from a previously applied template (only one template at a time should be used). It seems to be a dependency or context issue with the rating mixin, but I've tried adding the 'rating' module to the __manifest__.py file and tasks still aren't successfully unlinked. How can I unlink tasks without running into this rating issue?

The code:

@api.onchange('taskset_template_id')
def onchange_taskset_template_id(self):
    if not self.project_deadline:
        raise ValidationError('In order to apply a taskset template you must first select a project deadline.')
    project = self.env['project.project'].browse(self._origin.id)
    tasks = self.env['project.task']

    # Check for template tasks delete to avoid task duplication
    find_template_tasks = self.env['project.task'].search([('project_id', '=', project.id), ('from_template', '=', True)])
    if find_template_tasks:
        for task in tasks.browse(find_template_tasks.ids):
            super(Task, task).unlink()
        
    if not self.taskset_template_id:
        raise ValidationError(
            'You have already applied a taskset template to this project. Before removing the template selection, please delete all tasks associated with the current template.'
        )

    task_ids = self.env['taskset.template.line'].search([('taskset_template_id', '=', self.taskset_template_id.id)]).ids

    for task in self.env['taskset.template.line'].browse(task_ids):
        data = self._map_template_tasks_default_values(task)

        # Calculate deadline
        days_from_deadline = task.day_counter
        deadline = self._calculate_deadline(self.project_deadline, days_from_deadline, project)
        data.update({'project_id': project.id,
                     'date_deadline': deadline,
                     'date_assign': fields.Datetime.now(),
                     'partner_id': self.partner_id.id,
                     'from_template': True})

        new_task = super(Task, tasks).create(data)
        tasks += new_task

    project.write({'tasks': [(tasks.ids)]})

The error:

Traceback (most recent call last):
  File "/Users/nathancobb/odoo/odoo/odoo/api.py", line 753, in get
    value = self._data[field][record._ids[0]]
KeyError: <NewId origin=4>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/nathancobb/odoo/odoo/odoo/fields.py", line 978, in __get__
    value = env.cache.get(record, self)
  File "/Users/nathancobb/odoo/odoo/odoo/api.py", line 759, in get
    raise CacheMiss(record, field)
odoo.exceptions.CacheMiss: ('project.project(<NewId origin=4>,).rating_percentage_satisfaction', None)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/nathancobb/odoo/odoo/odoo/http.py", line 619, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/Users/nathancobb/odoo/odoo/odoo/http.py", line 309, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "/Users/nathancobb/odoo/odoo/odoo/tools/pycompat.py", line 14, in reraise
    raise value
  File "/Users/nathancobb/odoo/odoo/odoo/http.py", line 664, in dispatch
    result = self._call_function(**self.params)
  File "/Users/nathancobb/odoo/odoo/odoo/http.py", line 345, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/Users/nathancobb/odoo/odoo/odoo/service/model.py", line 93, in wrapper
    return f(dbname, *args, **kwargs)
  File "/Users/nathancobb/odoo/odoo/odoo/http.py", line 338, in checked_call
    result = self.endpoint(*a, **kw)
  File "/Users/nathancobb/odoo/odoo/odoo/http.py", line 909, in __call__
    return self.method(*args, **kw)
  File "/Users/nathancobb/odoo/odoo/odoo/http.py", line 510, in response_wrap
    response = f(*args, **kw)
  File "/Users/nathancobb/odoo/odoo/addons/web/controllers/main.py", line 1319, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "/Users/nathancobb/odoo/odoo/addons/web/controllers/main.py", line 1311, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/Users/nathancobb/odoo/odoo/odoo/api.py", line 395, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
  File "/Users/nathancobb/odoo/odoo/odoo/api.py", line 382, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/Users/nathancobb/odoo/odoo/odoo/models.py", line 6050, in onchange
    todo = [
  File "/Users/nathancobb/odoo/odoo/odoo/models.py", line 6053, in <listcomp>
    if name not in done and snapshot0.has_changed(name)
  File "/Users/nathancobb/odoo/odoo/odoo/models.py", line 5920, in has_changed
    return self[name] != record[name]
  File "/Users/nathancobb/odoo/odoo/odoo/models.py", line 5579, in __getitem__
    return self._fields[key].__get__(self, type(self))
  File "/Users/nathancobb/odoo/odoo/odoo/fields.py", line 1002, in __get__
    self.compute_value(recs)
  File "/Users/nathancobb/odoo/odoo/odoo/fields.py", line 1087, in compute_value
    records._compute_field_value(self)
  File "/Users/nathancobb/odoo/odoo/odoo/models.py", line 3895, in _compute_field_value
    getattr(self, field.compute)()
  File "/Users/nathancobb/odoo/odoo/addons/rating/models/rating_mixin.py", line 42, in _compute_rating_percentage_satisfaction
    record.rating_percentage_satisfaction = repartition['great'] * 100 / sum(repartition.values()) if sum(repartition.values()) else -1
AttributeError: 'NoneType' object has no attribute 'values'