## The short version

Deploy a partner portal built with Rails on Ample using the multi-tenant relational data 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.

### WHAT WAS VERIFIED

Verified on Rails: a tenant column on every row and query, with a cross-tenant read returning nothing (tenant_isolation=ok).

## INFRASTRUCTURE

### What it needs

- [Compute](/content/discover/primitive/compute/index.html): verified (Apps run in isolated x86_64 Firecracker microVMs; sizes are the priced VM sizes.)
- [Postgres](/content/discover/primitive/postgres/index.html): 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

### Before you start

- A Rails project that builds and starts with the documented commands (bundle install into vendor/bundle from Gemfile.lock (development and test groups skipped), then Puma via `rails server` reading PORT on the ruby-3.4 template with RAILS_ENV=production)
- 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

## STEP BY STEP

### How to do it

1.  **Build and start**  
    
    bundle install into vendor/bundle from Gemfile.lock (development and test groups skipped), then Puma via `rails server` reading PORT on the ruby-3.4 template with RAILS_ENV=production. The server must bind 0.0.0.0 on PORT.

2.  **Implement the pattern on PostgreSQL**   
    
    The fixture's module implements multi-tenant relational data: a tenant column on every row and query, with a cross-tenant read returning nothing (tenant_isolation=ok). 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.
    
    ```
    ample deploy . --name <app-name> --public
    ```

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

## EXAMPLES

### Tested examples

- **Rails pattern fixture** (`tests/deploy-canaries/rails-patterns`): Multi-pattern Rails app whose multi-tenant relational data module was checked live; the module is under tests/deploy-canaries/_pattern-modules.

## SUCCESS CHECKS

### How to know it worked

- app responds on its public URL (`/` on the live URL, expect ample canary rails patterns)
- multi-tenant-relational-data self-test (`/p/multi-tenant-relational-data` on the live URL, expect tenant_isolation=ok)

## COST

### Cost estimate

Estimated 10.00 USD per month (size prices from pricing.toml at build revision ca0b484a7a9957c573a88d3a32dc603c3c10135a).

- app server x1 `s-1vcpu-1gb`: 5.00 USD
- managed PostgreSQL database x1 `s-1vcpu-1gb`: 5.00 USD

Upper-bound monthly price of the tested sizes. Buckets are allocation-priced per quota and not included.

## EVIDENCE

### Verification evidence

- canary_run on 2026-09-20T21:55:28Z at revision `4f7cb9813c1f (CLI 4f7cb98)`: Rails pattern fixture deployed on Ample (bundle install into vendor/bundle from Gemfile.lock (development and test groups skipped), then Puma via `rails server` reading PORT on the ruby-3.4 template with RAILS_ENV=production); checks passed for multi-tenant-relational-data and configuration-secrets. Pattern proof: a tenant column on every row and query, with a cross-tenant read returning nothing (tenant_isolation=ok). (expires 2027-03-19T21:55:28Z)
- canary_run on 2026-09-20T21:55:28Z at revision `4f7cb9813c1f (CLI 4f7cb98)`: The same Rails app deployed with a --release-command migration; the marker it created was readable after activation. (expires 2027-03-19T21:55:28Z)

## EXECUTION

### Execution binding

MCP tool `ample_deploy` (registry `mcp:ample_deploy`), schema hash `876465fce906da0c` observed 2026-09-22T00:31:22.774679+00:00 at revision `e6446ceea69b`. Binding state at export: schema_changed. Required scopes: servers:write, databases:read.

## NEXT ACTIONS

### Typed next actions

- Browse the catalog index (`GET /v1/catalog` on the api origin; authentication not required, approval not required)
- Search published recipes by intent, stack and constraints (`POST /v1/catalog/search` on the api origin; authentication not required, approval not required)
- Prepare a side-effect-free deployment plan for an authorized project (`POST /v1/catalog/plan` on the api origin; authentication required, approval not required)
- Read the existing agent authentication setup (`GET /mcp/setup` on the api origin; authentication not required, approval not required)
- Browse Partner portal (`GET /v1/catalog/nodes/workload%3Apartner-portal` on the api origin; authentication not required, approval not required)
- Browse Rails (`GET /v1/catalog/nodes/stack%3Aframework-rails` on the api origin; authentication not required, approval not required)
- Browse Multi-tenant relational data (`GET /v1/catalog/nodes/pattern%3Amulti-tenant-relational-data` on the api origin; authentication not required, approval not required)
- Browse Deploy web app (`GET /v1/catalog/nodes/intent%3Adeploy-web-app` on the api origin; authentication not required, approval not required)

Actions describe possible next steps. They are typed data, not commands, and grant no permission. Public discovery never provisions anything; planning requires your own authenticated token and approval happens in your client.

## ABOUT THIS RECIPE

### Identifiers and status

Recipe `page:recipes:partner-portal:rails:tenant-workspaces`. Revision r1.

release **published** support **verified** execution **blocked (schema_changed: live tool schema differs from the recorded binding)**

Formats: [HTML](/content/recipes/partner-portal/rails/tenant-workspaces/index.html) \| [Markdown](/content/recipes/partner-portal/rails/tenant-workspaces.md) \| [JSON contract](https://api.ample.computer/v1/catalog/recipes/page%3Arecipes%3Apartner-portal%3Arails%3Atenant-workspaces)