adding check for nullity in related models delete #234

	# This workflow will install Python dependencies, run tests and lint with a single version of Python
	# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

	name: Python application

	on: [push, pull_request]

	jobs:
	tests_python:
	name: Test on Python ${{ matrix.python_version }}
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python_version:
	- '3.8'
	- '3.9'
	- '3.10'
	- '3.11'
	- '3.12'
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	steps:
	- uses: actions/checkout@v4
	- name: Set up Python ${{ matrix.python_version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python_version }}
	- name: Cache pip
	uses: actions/cache@v4
	with:
	# This path is specific to Ubuntu
	path: ~/.cache/pip
	key: ${{ runner.os }}-pip-${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install --upgrade 'tox>=4.0.0rc3'
	- name: Run tox targets for ${{ matrix.python_version }}
	run: tox run -f py$(echo ${{ matrix.python_version }} \| tr -d .)

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