Fix Django CI workflow: Python versions, missing checkout, duplicate setup-python

[Copilot]

The Django CI workflow was broken on ubuntu-latest (Ubuntu 24.04) due to three compounding issues: EOL Python versions in the matrix, a missing checkout step, and two conflicting setup-python steps where the matrix version was never actually applied.

Changes

• Matrix: Replaced ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"] with ["3.9", "3.10", "3.11", "3.12"] — 3.7/3.8 are EOL and absent from the Ubuntu 24.04 tool cache
• Checkout: Added actions/checkout@v4 as the first step — previously missing entirely
• Setup Python: Replaced two conflicting steps (one hardcoded 3.10 via @v4, one matrix-driven via @v3) with a single actions/setup-python@v5 using ${{ matrix.python-version }}

steps:
- uses: actions/checkout@v4

- name: Set up Python ${{ matrix.python-version }}
  uses: actions/setup-python@v5
  with:
    python-version: ${{ matrix.python-version }}

Original prompt

Problem

The Django CI GitHub Actions workflow at .github/workflows/django.yml is failing with the following error:

The version '3.1' with architecture 'x64' was not found for Ubuntu 24.04.

There are multiple issues in the current workflow:

Issue 1: Python 3.7 and 3.8 are unsupported on ubuntu-latest

ubuntu-latest now maps to Ubuntu 24.04, which does not support Python 3.7 or 3.8. Those versions are end-of-life and have been removed from the GitHub-hosted runner tool cache.

Issue 2: Duplicate and conflicting setup-python steps

There are two setup-python steps — the first one hardcodes python-version: 3.10 using @v4, and the second uses @v3 with ${{ matrix.python-version }}. The matrix version is never properly applied.

Issue 3: Missing actions/checkout step

There is no actions/checkout step, so the code is never checked out before running pip install -r requirements.txt or python manage.py test.

---

Fix

Update .github/workflows/django.yml with the following corrected content:

name: Django CI

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

jobs:
  build:

    runs-on: ubuntu-latest
    strategy:
      max-parallel: 4
      matrix:
        python-version: ["3.9", "3.10", "3.11", "3.12"]

    steps:
    - uses: actions/checkout@v4

    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v5
      with:
        python-version: ${{ matrix.python-version }}

    - name: Install Dependencies
      run: |
        python -m pip install --upgrade pip
        pip install -r requirements.txt

    - name: Run Tests
      run: |
        python manage.py test

Summary of changes:

Issue	Fix
Python 3.7 and 3.8 not available on Ubuntu 24.04	Removed them; matrix now uses 3.9, 3.10, 3.11, 3.12
Duplicate setup-python steps	Merged into a single step using ${{ matrix.python-version }}
Outdated action versions (@v3, @v4)	Updated to actions/setup-python@v5
Missing checkout step	Added actions/checkout@v4 as the first step

This pull request was created from Copilot chat.

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