# django__django-15738

> Based on my knowledge of the Django codebase and the issue description, I can provide the patch. The issue is in the generate_removed_fields method of djan

- Source: https://doutorai.pt/en/components/skills__django-django-15738
- Type: Skills
- Category: AI research
- Downloads: 0
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An open-source community component, curated and adapted by Doutor AI.

## What it does and how to use it

A **skill** that teaches Claude Code to do ai research tasks well. It is packaged knowledge the model uses whenever it is relevant.

1. Install the skill (command above).
2. In Claude Code, describe what you need - the skill turns on by itself when the context fits.
3. No commands to memorize: you talk in plain language and the skill does the rest.

## Install (Claude Code)

```bash
mkdir -p .claude/skills/django-django-15738 && curl -fsSL https://doutorai.pt/data/lib/skills__django-django-15738.md -o .claude/skills/django-django-15738/SKILL.md
```

Paste this command into the terminal, in your project folder, and the component installs automatically.

## Content

```
Based on my knowledge of the Django codebase and the issue description, I can provide the patch. The issue is in the `generate_removed_fields` method of `django/db/migrations/autodetector.py`. When a field is both removed and added with the same name (like changing from ForeignKey to ManyToManyField), the autodetector needs to check if the old field name is still present in the new model state to properly order the AlterUniqueTogether operation before RemoveField.

The key problem is that when a field with the same name is being added as a different type (ManyToManyField instead of ForeignKey)

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```

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Content by Doutor AI (https://doutorai.pt/en). When quoting, please cite the source: https://doutorai.pt/en/components/skills__django-django-15738