# Host csv import tool with Django: file attachments

Deploy a csv import tool built with Django on Ample using the browser file uploads pattern. Compute runs the app in an isolated microVM behind a public HTTPS URL, a managed PostgreSQL 16 database is auto-provisioned and injected as DATABASE_URL, a private S3-compatible bucket holds objects with credentials delivered as encrypted environment variables. Verified on Django: content-type and size validation that rejects disallowed files, an object written to a private bucket and a row linking the record to the object key (reject=ok upload=ok linked=ok). Not separately tested: your upload UI, allowed types, size limits and virus scanning; treat the csv import tool-specific behavior as your application code.

## Representative Queries
- Host csv import tool with Django: file attachments
- Where can I host CSV import tool built with Django?
- I need a restricted upload flow, file validation and record-to-object linkage.

## Resource Requirements
- **Primitive Compute**
- **Primitive Postgres**
- **Primitive S3-compatible Object Storage**

## Infrastructure Requirements
- **Compute**: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.
- **Postgres**: Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.
- **S3-compatible Object Storage**: Buckets are S3-compatible with issued credentials; PutObject and GetObject are verified by canary. Other S3 operations are not verified.

## Framework
Django

## Workload
CSV import tool

## Release Status
Published

## Support Status
Verified

## Execution Status
Ready

## Prerequisites
- A Django project that builds and starts with the documented commands (pip install into .ample/python from requirements.txt, then waitress serving project.wsgi from run.py reading PORT on the python-3.12 template)
- A PostgreSQL driver reading DATABASE_URL at runtime (auto-provisioned when omitted, or supplied with --env)
- A bucket from `ample bucket create` with its credentials passed as encrypted S3_* environment variables
- An Ample account token with servers:write, databases:read, buckets:read

## Tested Configuration
- **Template**: python-3.12
- **Runtime**: python
- **Size**: s-1vcpu-1gb
- **Install**: python3 -m pip install --target .ample/python -r requirements.txt
- **Start**: PYTHONPATH=.ample/python:${PYTHONPATH:-} python3 run.py

## Input Schema
- **Properties**:
  - **env**: Encrypted environment variables (bucket credentials, secrets)
  - **name**: App name
  - **path**: Project directory or ample.toml service
  - **release_command**: Migration command run before activation
  - **start**: Start command (Python apps pass one explicitly)
- **Required**: env, name, path, start

## Workflow Steps
1. **Build and start**: pip install into .ample/python from requirements.txt, then waitress serving project.wsgi from run.py reading PORT on the python-3.12 template. The server must bind 0.0.0.0 on PORT.
2. **Implement the pattern on PostgreSQL**: The fixture's module implements browser file uploads: content-type and size validation that rejects disallowed files.
3. **Wire object storage**: Create the bucket(s), then pass endpoint, region, bucket and keys as --env values.
4. **Deploy**: Run the synchronous deploy once and read the result (exit 0 live, 1 failed, 2 blocked).
5. **Verify**: Fetch the live URL and the pattern self-test route(s).

## Examples
- **Django pattern fixture**: Multi-pattern Django app whose browser file uploads module was checked live; the module is under tests/deploy-canaries/_pattern-modules.

## Cost Estimate
- **Currency**: USD
- **Monthly Amount**: 10.0
- **Components**:
  - App server: s-1vcpu-1gb
  - Managed PostgreSQL database: s-1vcpu-1gb
- **Note**: Always-on monthly price of the tested sizes; apps and databases auto-pause when idle.

## Limitations
- Verified on the python-3.12 template; other sizes and Django major versions are not verified.
- The csv import tool itself is application code and was not separately tested.
- Region, compliance attestations and request-duration limits are unknown and not claimed.

## Evidence Summary
- **Canary Run**: Django pattern fixture deployed on Ample.
- **Last Verified At**: 2026-09-20T03:31:44Z

## Unknowns
- Region availability is unknown until a verified region fact is recorded.

## Formats
- **HTML**: [ample.computer](/content/recipes/csv-import-tool/django/attachments/index.html)
- **Markdown**: [ample.computer](/content/recipes/csv-import-tool/django/attachments.md)
- **JSON**: [api.ample.computer](https://api.ample.computer/v1/catalog/recipes/page%3Arecipes%3Acsv-import-tool%3Adjango%3Aattachments)

## Next Actions
- **Browse the Catalog Index** 
- **Search Published Recipes by Intent, Stack and Constraints** 
- **Prepare a Side-effect-free Deployment Plan for an Authorized Project** 
- **Read the Existing Agent Authentication Setup** 
- **Browse CSV Import Tool** 
- **Browse Django** 
- **Browse Browser File Uploads** 
- **Browse Deploy Web App**