Issue installing Partner Statement on V16

[PhillipHumint]

Module
partner_statement (part of account-financial-reporting)

Describe the Bug
When attempting to install the partner_statement module, the installation fails with a KeyError: 'active_ids'. The error occurs when the module tries to access "active_ids" from the context, but it is missing.

To Reproduce
Affected versions: Odoo 16.0

Steps to reproduce the behavior:

Navigate to Apps in Odoo.
Search for and install the partner_statement module.
The installation process fails with a traceback error.
Expected Behavior
The module should install successfully without errors.

Error Log
python
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2025-03-13 05:47:33,241 2828189 ERROR realvisionv16.humint.co.za odoo.http: Exception during request handling.
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/odoo/http.py", line 2071, in call
response = request._serve_db()
File "/usr/lib/python3/dist-packages/odoo/http.py", line 1658, in _serve_db
return service_model.retrying(self._serve_ir_http, self.env)
File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 152, in retrying
result = func()
...
File "/var/odoo/realvisionv16.humint.co.za/extra-addons/account-financial-reporting.git-67d2714bceeeb/partner_statement/wizard/statement_common.py", line 24, in
default=lambda self: len(self._context["active_ids"])
KeyError: 'active_ids'
Additional Context
OS: Ubuntu 22.04
Python Version: 3.x
The issue appears to be caused by the default field trying to access "active_ids" in the context without checking if it exists.
Suggested Fix
Modify the line in statement_common.py:

default=lambda self: len(self._context.get("active_ids", []))
This will prevent the error when "active_ids" is not available in the context.

[gdgellatly]

Well make a PR, it is good practice but I am less than convinced it is the root cause.

I feel like some upstream bugfix has had unintended consequences. There is just no reason for that default to be evaluated at install and I got it on another previously harmless default idiom this week. default=lambda s: s.env.ref('somexmlrecordofmodule') which has worked forever and a day, and now it fails.

[PhillipHumint]

[16.0][IMP] partner_statement: Allow installation of partner_statement on 16.0 - Issue 1299 #130

Pull request has been created.