### Host help desk with FastAPI: relational workspace data

Deploy a help desk built with FastAPI on Ample using the relational records 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. Verified on FastAPI: a workspace-scoped table, an explicit state machine (draft to review to published) that rejects invalid transitions, and a cross-workspace read that returns nothing (transitions=true isolation=true). Not separately tested: your record schema, states and access rules; treat the help desk-specific behavior as your application code.

#### Representative Queries
- Host help desk with FastAPI: relational workspace data
- Where can I host Help desk built with FastAPI?
- I need a workspace-specific schema, state transitions and access rules.

#### Resource Requirements
- `primitive:compute`
- `primitive:postgres`

#### Infrastructure Requirements
1. **Compute**  
   *Status: verified*  
   Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.

2. **Postgres**  
   *Status: 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.

#### Prerequisites
- A FastAPI project that builds and starts with the documented commands (pip install into .ample/python from requirements.txt, then uvicorn 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)
- An Ample account token with servers:write, databases: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
- **type**: `object`
- **required**: [`name`, `path`, `start`]
- **properties**:
    - `env`: 
        - *description*: Encrypted environment variables (bucket credentials, secrets)
        - *type*: `array`
        - *items*:
            - *type*: `string`
              *pattern*: `^[A-Z][A-Z0-9_]*=.*$`
        - *maxItems*: 50
    - `name`: 
        - *description*: App name
        - *type*: `string`
        - *maxLength*: 63
        - *minLength*: 1
        - *pattern*: `^[a-z0-9-]+$`
    - `path`:
        - *type*: `string`
        - *maxLength*: 512
        - *minLength*: 1
    - `release_command`:
        - *type*: `string`
        - *maxLength*: 512
    - `start`:
        - *type*: `string`
        - *maxLength*: 512

#### Workflow Steps
1. **Build and start**  
   pip install into .ample/python from requirements.txt, then uvicorn 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 relational records: a workspace-scoped table, an explicit state machine (draft to review to published) that rejects invalid transitions, and a cross-workspace read that returns nothing (transitions=true isolation=true). Copy the approach into your schema; keep migrations idempotent and run them with --release-command.

3. **Deploy**  
   Run the synchronous deploy once and read the result (exit 0 live, 1 failed, 2 blocked). Re-running with no change is a no-op.
   ```bash
   ample deploy . --name  --public --start "python3 run.py"
   ```

4. **Verify**  
   Fetch the live URL and the pattern self-test route(s) (/p/relational-records) from the example; then run your own checks. On failure read `ample logs  --kind build` then `--kind runtime`.
   ```bash
   ample logs  --kind build
   ```

#### Limitations
- Verified on the python-3.12 template at s-1vcpu-1gb with the example fixture; other sizes, templates and FastAPI major versions are not verified.
- The help desk itself (your record schema, states and access rules) is application code and was not separately tested; the pattern checks are what was verified.
- Region, compliance attestations and request-duration limits are unknown and not claimed.
- Apps auto-pause when idle and wake on the next request; always-on is an operator setting, not a plan feature.
- Managed PostgreSQL 16 only; extensions, connection limits and backup or restore procedures are not verified; apps and their databases are placed together.

#### Cost Estimate
- **Currency**: USD
- **Monthly Amount**: 10.0
- **Authoritative**: true
- **Basis**: size prices from pricing.toml (loaded by the API) at build revision 1ac5595375130d45290090e82ed0f554ccd45405-dirty
- **Components**:
    1. **App server**  
       - *Size*: `s-1vcpu-1gb`
       - *Quantity*: 1.0
       - *Monthly Amount*: 5.0
    2. **Managed PostgreSQL database**  
       - *Size*: `s-1vcpu-1gb`
       - *Quantity*: 1.0
       - *Monthly Amount*: 5.0
- **Note**: Always-on monthly price of the tested sizes; apps and databases auto-pause when idle. Buckets are allocation-priced per quota and not included.

#### Evidence Summary
1. **Canary run**  
    - **Summary**: FastAPI pattern fixture deployed on Ample; checks passed for relational-records and configuration-secrets. 
    - **Observed At**: 2026-09-21T01:14:18Z
    - **Implementation Revision**: 50dbac567d2c5cc8e55e6c748a646be0025d9cfb-dirty (CLI 0.1.21)
    - **Expires At**: 2027-03-20T01:14:18Z
    - **Scope**:
        - **Checks**: `/p/relational-records` 
        - **Pattern**: `pattern:relational-records`  
        - **Template**: `python-3.12`

2. **Canary run**  
    - **Summary**: The same FastAPI app deployed with a --release-command migration; the marker it created was readable after activation.
    - **Observed At**: 2026-09-20T01:54:51Z
    - **Implementation Revision**: 199ff1dfd52683832ae75d3f98b53a7a4bff7f96-dirty (CLI e3181f5)
    - **Expires At**: 2027-03-19T01:54:51Z
    - **Scope**:
        - **Pattern**: `pattern:relational-records`

#### Formats
- **HTML**: [Link](/content/recipes/help-desk/fastapi/relational-workspace/index.html)
- **Markdown**: [Link](/content/recipes/help-desk/fastapi/relational-workspace.md)
- **JSON**: [Link](https://api.ample.computer/v1/catalog/recipes/page%3Arecipes%3Ahelp-desk%3Afastapi%3Arelational-workspace)

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