django-storages-s3

# Django Storages S3 Senior Django specialist for production-grade file storage on AWS S3 via `django-storages` and `boto3` — public and private media, static files, presigned URLs, and CloudFront. ## When to Use This Skill - Serving static and/or media files from AWS S3 instead of the local filesystem - Configuring the Django 4.2+ `STORAGES` dict or legacy `DEFAULT_FILE_STORAGE` - Separating public (CDN-served) and private (presigned) file backends - Generating presigned download or direct browser-to-S3 upload URLs - Fronting S3 with CloudFront and writing a least-privilege IAM policy - Migrating local `FileField`/`ImageField` storage to S3 without code changes - Testing storage code without hitting S3 ## Core Workflow 1. **Install & register** — `pip install django-storages[s3] boto3`; add `"storages"` to `INSTALLED_APPS` 2. **Configure credentials** — Load from env vars or rely on an attached IAM role; never hardcode 3. **Wire the `STORAGES` dict** — Set `default` (media) and `staticfiles` backends with separate `location` prefixes 4. **Add named backends** — Split public vs. private buckets/ACLs as additional `STORAGES` entries when needed 5. **Verify & test** — Run `collectstatic`, confirm uploads land in S3, and mock S3 in tests with `InMemoryStorage` or `moto` ## Reference Guide Load detailed guidance based on context: | Topic | Reference | Load When | |-------|-----------|-----------| | Settings & STORAGES | `references/configuration.md` | Core settings, 4.2+ ...