page:recipes:form collection:rails:data imports

Host form collection with Rails: structured data imports

Deploy a form collection built with Rails on Ample using the bulk import staging 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 Rails: a CSV staged as an object, row-level validation with per-row errors recorded, and a restart-safe import keyed by import id (imported=2 rejected=1 restart=ok). Not separately tested: your import format, mapping and conflict rules; treat the form collection-specific behavior as your application code.

Representative Queries

• Host form collection with Rails: structured data imports
• Where can I host Form collection built with Rails?
• I need a workload-specific import mapping, conflict rules and restart behavior.

Resource Requirements

• primitive:compute
• primitive:postgres
• primitive:s3-compatible-object-storage

Infrastructure Requirements

1. Compute: Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database.
2. Postgres: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle.
3. S3-compatible object storage: Buckets are S3-compatible; PutObject and GetObject are verified by canary.

Prerequisites

• A Rails project built with documented commands (bundle install into vendor/bundle).
• A PostgreSQL driver reading DATABASE_URL at runtime.
• An Ample account token with appropriate permissions.

Workflow Steps

1. Build and start: Run bundle install and start with rails server.
2. Implement the pattern on PostgreSQL: Use CSV staged as an object for validation and error recording.
3. Wire object storage: Create buckets and pass credentials as environment variables.
4. Deploy: Run the synchronous deploy and check the result.
5. Verify: Fetch the live URL and perform self-checks.

Examples

• Rails pattern fixture: Multi-pattern Rails app checked live.

Success Checks

• App responds on its public URL.
• Bulk-import-staging self-test.

Limitations

• Verified on the ruby-3.4 template; other sizes and versions are not verified.
• The form collection behavior is application code and was not separately tested.

Cost Estimate

• Monthly amount: $10.0 (USD) based on size prices.

Evidence Summary

• Rails pattern fixture deployed successfully and checked for bulk-import-staging.