# Tutoring centers: asset library using Django

## Summary

A asset library blueprint for tutoring centers built with Django on Ample. Domain schema: course_groups (subject, level, start_at, end_at, capacity): tutoring groups; memberships (course_group_id, student_reference, guardian_reference, role): students, guardians and tutors; sessions (course_group_id, starts_at, tutor, attendance_count): session events; materials (course_group_id, title, object_key, visibility): worksheets and answer keys; uploads (id, owner_reference, object_key, content_type, size, uploaded_at): validated uploads linked to their owner. Public information: subjects and levels, schedule and locations, tutor qualifications. Kept out of scope until handling is reviewed: minor students and guardian identity, progress reports. Data about minors is sensitive; only group schedules and materials are modeled here. Technical basis 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).

## Infrastructure requirements

- Compute: verified (Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.)
- Postgres: verified (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: verified (Buckets are S3-compatible with issued credentials; PutObject and GetObject are verified by canary. Other S3 operations are not verified.)

## Prerequisites

- A Django project (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 (auto-provisioned when omitted)
- Bucket credentials from `ample bucket create` passed as encrypted S3_* environment variables
- A review of which tutoring centers data classes may be handled at all; this blueprint models public information only

## Exact 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`

## Steps

1. **Model the tutoring centers domain.** Create the tables course_groups, memberships, sessions, materials, uploads. Tutoring groups lives in course_groups; keep the sensitive classes (minor students and guardian identity, progress reports) out of this schema.
2. **Workflow step 1.** Model assets linked to their owning group or workspace.
3. **Workflow step 2.** Validate uploads and store them in the private bucket; link each object to its row.
4. **Workflow step 3.** Authorize downloads by membership.
5. **Workflow step 4.** Deploy and verify rejection of disallowed files and a linked upload.
6. **Deploy.** Run the synchronous deploy once and read the result. Re-running with no change is a no-op.

```
   ample deploy . --name <app-name> --public --start "python3 run.py" --env S3_ENDPOINT=... --env S3_REGION=... --env S3_BUCKET=... --env S3_ACCESS_KEY_ID=... --env S3_SECRET_ACCESS_KEY=...
   ```
7. **Verify.** Run the pattern self-test(s) from the example (/p/browser-file-uploads) and your own acceptance checks for the tutoring centers workflow.

```
   ample logs <deployment_id> --kind build
   ```

## Tested examples

- **Django pattern fixture** (tests/deploy-canaries/django-patterns): Verified browser file uploads basis for this blueprint.

## Success checks

- app responds on its public URL (`/` on the live URL, expect ample canary django patterns)
- browser-file-uploads self-test from the example (`/p/browser-file-uploads` on the live URL, expect see the pattern fixture checks)

## Limitations

- The technical basis (browser file uploads on Django) was verified with the pattern fixture; the tutoring centers schema and workflow are an original design for this blueprint and were not executed as a separate application.
- No health, financial, privacy or other compliance claim is made. Data about minors is sensitive; only group schedules and materials are modeled here.
- Public content and synthetic examples only until actual data-handling requirements have been reviewed.
- Verified on the python-3.12 template at s-1vcpu-1gb; region, request-duration limits and other sizes are unknown or unverified.
- Managed PostgreSQL 16 only; extensions, connection limits and backup or restore procedures are not verified.
- PutObject and GetObject with path-style addressing are verified; other S3 operations and CDN cache rules are not.

## Cost estimate

Estimated 10.00 USD per month (size prices from pricing.toml at build revision a1b8c38919e59cd035ebabaced73cf84ece24371).
- app server x1 `s-1vcpu-1gb`: 5.00 USD
- managed PostgreSQL database x1 `s-1vcpu-1gb`: 5.00 USD

Always-on monthly price of the tested sizes; apps and databases auto-pause when idle. Buckets are allocation-priced per quota and not included.

## Verification evidence

- canary_run on 2026-09-20T03:31:44Z at revision `03b6402b1b3e19178985f08ea4033804521d85d4-dirty (CLI b75e104)`: Django pattern fixture deployed on Ample (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 browser file uploads checks passed: 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). The blueprint's Tutoring centers schema and workflow below build on that verified basis and were not separately executed. (expires 2027-03-19T03:31:44Z)