django-storages-s3

1# Django Storages S3
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3Senior 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.
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5## When to Use This Skill
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7- Serving static and/or media files from AWS S3 instead of the local filesystem
8- Configuring the Django 4.2+ `STORAGES` dict or legacy `DEFAULT_FILE_STORAGE`
9- Separating public (CDN-served) and private (presigned) file backends
10- Generating presigned download or direct browser-to-S3 upload URLs
11- Fronting S3 with CloudFront and writing a least-privilege IAM policy
12- Migrating local `FileField`/`ImageField` storage to S3 without code changes
13- Testing storage code without hitting S3
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15## Core Workflow
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171. **Install & register** — `pip install django-storages[s3] boto3`; add `"storages"` to `INSTALLED_APPS`
182. **Configure credentials** — Load from env vars or rely on an attached IAM role; never hardcode
193. **Wire the `STORAGES` dict** — Set `default` (media) and `staticfiles` backends with separate `location` prefixes
204. **Add named backends** — Split public vs. private buckets/ACLs as additional `STORAGES` entries when needed
215. **Verify & test** — Run `collectstatic`, confirm uploads land in S3, and mock S3 in tests with `InMemoryStorage` or `moto`
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23## Reference Guide
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25Load detailed guidance based on context:
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27| Topic | Reference | Load When |
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29…