django-migration-fixer

Resolve django makemigrations multiple leaf nodes in the migration graph by ensuring that migration files and dependencies are always ordered regardless of remote changes, without having to run python manage.py makemigrations --merge.

Table of Contents

• Features
• Installation
  • Add migration_fixer to your INSTALLED_APPS
• Usage
• Example
  • After merging the default branch
  • After running django-migration-fixer
• Assumptions
  • Specifying a different default branch
• Setup using Github Actions
  • Inputs
• Test Platforms
• Found a Bug?

Features

• Resolve migration conflicts on Pull Request branches
• Resolve migration conflicts on the default branch (NOT RECOMMENDED)

Installation

$ pip install django-migration-fixer

Add migration_fixer to your INSTALLED_APPS

INSTALLED_APPS = [
    ...,
    "migration_fixer",
    ...,
]

Usage

Merge the changes from the default branch or the target branch of the pull request.

$ git checkout main # OR: develop/another parent feature branch
$ git pull
$ git checkout feature/xxxx
$ git merge main

Fix the migration conflicts

$ python manage.py makemigrations --fix

By default this uses main as the default branch

Example

After merging the default branch

After running django-migration-fixer

Assumptions

The final migration on the default branch would be used as the base for all subsequent migrations.

Specifying a different default branch

Run:

$ python manage.py makemigrations -b master --fix

Setup using Github Actions

NOTE: ⚠️

• To get this action to work you'll need to install django-migration-fixer and update your INSTALLED_APPS setting.

Inputs

Input	type	required	default	description
managepy-path	string	true	./manage.py	The location of manage.py.
default-branch	string	false	${{ github.base_ref }}	The default branch or target branch of a Pull request.
force-update	string	false		Force update the target branch locally when git fetch fails.
skip-default-branch-update	string	false		Skip pulling the latest changes from the default branch.

name: Fix django migrations

on:
  pull_request:
    branches:
      - main

jobs:
  fix-migrations:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Set up Python
        uses: actions/setup-python@v2
        with:
          python-version: '3.6.x'

      - name: Upgrade pip
        run: |
          pip install -U pip

      - name: Install project dependencies
        run: |
          make install

      - name: Run django-migration-fixer
        uses: tj-django/[email protected]
        with:
          managepy-path: /path/to/manage.py

      - name: Verify Changed files
        uses: tj-actions/[email protected]
        id: verify-changed-files
        with:
          files: |
             /path/to/migrations

      - name: Commit migration changes
        if: steps.verify-changed-files.outputs.files_changed == 'true'
        run: |
          git config --local user.email "github-actions[bot]@users.noreply.github.com"
          git config --local user.name "github-actions[bot]"
          git add /path/to/migrations
          git commit -m "Updated migrations"

      - name: Push migration changes
        if: steps.verify-changed-files.outputs.files_changed == 'true'
        uses: ad-m/github-push-action@master
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          branch: ${{ github.ref }}

See: here for a working example.

Test Platforms

• ubuntu-*
• macos-*
• windows-*

Found a Bug?

To file a bug or submit a patch, please head over to django-migration-fixer on github.

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