[BUG][18.0] report_csv: _render_csv fails when docids is None

[LoayMoh99]

Module

report_csv

Describe the bug

Rendering a CSV report fails with a TypeError when docids is None.
The _render_csv method assumes docids is always iterable and calls len(docids) without checking its value.

To Reproduce

Affected versions:

Steps to reproduce the behavior:

1. Trigger a CSV report rendering without passing docids
2. _render_csv is called with docids=None
3. The method executes len(docids)
4. A TypeError is raised

Expected behavior
CSV reports should render correctly even when docids is None, consistent with other Odoo report renderers.

Actual behavior
A TypeError is raised and the report rendering fails.

Additional context
Error:

TypeError: object of type 'NoneType' has no len()

Code reference:

reporting-engine/report_csv/models/ir_report.py

Line 58 in 6d3b9f0

res_id = len(docids) == 1 and docids[0]

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Environment:
OS: Linux
Python: 3.x
Odoo: 18.0

[amrhossamdev]

Good catch... Hope they got that merged