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A working prototype is not production-ready until you can show who can access each table, how a change reaches the live database, and how you would recover the data and files after a failure. For a Supabase app, start by tightening database access and keeping privileged keys off the client; then make schema changes repeatable, test recovery and expected load, and establish a way to spot problems after launch. Supabase’s production guidance frames readiness around security, performance under expected load, and availability—not a single setting that makes an app safe.
Is every exposed table protected by RLS?
Start with the data boundary, not the frontend. Inventory tables in schemas exposed through the Data API, identify which application roles need which operations, and check both SQL grants and Row Level Security (RLS) policies. A table in an exposed schema without RLS can be accessed according to its grants. Adding policies does not remove grants that are broader than the app needs.
Match grants and policies to actual operations
- For each exposed table, list the operations each role needs:
select,insert,update, anddelete. Include anonymous visitors, signed-in users, and trusted server-side code where applicable. - Enable RLS on every exposed table. Then restrict SQL grants to the operations and roles the application requires.
- Write policies per operation and make their conditions reflect the intended user and data ownership rules. Do not treat a policy that permits reads as evidence that writes are also safe.
- Test both allowed and denied cases using realistic identities, including attempts to access another user’s records or submit unexpected values.
- Keep database tests in the project and run
supabase test dbas part of validation. Supabase’s RLS guidance recommends asserting allowed and denied behavior for the CRUD operations and relevant roles.
A useful test is not only “Can the intended user read their row?” but also “Can an anonymous request, a different signed-in user, or a user changing the request payload read or modify it?” Apply the same adversarial thinking to inserts, updates, and deletes.
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Which key and access route belongs in each part of the app?
A publishable key identifies the project; it does not authorize a user to read or change data. Browser access can be appropriate when exposed tables have RLS enabled, grants are limited, and policies enforce the intended permissions. Supabase says older projects may show an anon key; treat it like a publishable key rather than a secret, while still relying on RLS and least-privilege grants.
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Secret and service-role keys are different: they bypass RLS. Keep them out of browser bundles, mobile apps, public repositories, and any other client-controlled environment. Store them as backend secrets or environment variables and use them only in trusted server-side code.
| Access route | Appropriate use | Security boundary to verify |
|---|---|---|
| Frontend using the Data API and a publishable key | Client operations that can safely be authorized per user or role. | RLS is enabled, grants are limited, and policies enforce access for every required operation. |
| Server-side or Edge Function logic | Operations that need trusted server logic or privileged credentials. | Privileged keys remain on the backend; the function authenticates and authorizes the caller before acting. |
| Trusted direct database connection | Backend services or controlled administrative tasks that need database access. | Credentials and network access are restricted to trusted systems; application authorization is still deliberate. |
These routes have different security models; moving an operation server-side does not by itself make it authorized. Also review account MFA and organization access, SSL enforcement, database network restrictions, email confirmations, and authentication settings against Supabase’s production checklist.
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How will schema changes reach production?
Stop treating the live Dashboard as the place to make lasting schema edits. Supabase’s maturity guidance recommends version-controlled migrations and multiple environments, and advises against changing a live production database through the Dashboard. The purpose is reproducibility: a reviewed change should be testable before it affects production and recorded so environments can be kept in step.
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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minute- Develop locally: make schema changes through migrations rather than unrecorded edits.
- Review the change: check the migration for data loss, locking or deployment risks, permission changes, and compatibility with the application version being deployed.
- Validate in staging: apply the same migration path to a staging environment, run database and application tests, and confirm expected behavior before production rollout.
- Deploy through a controlled path: apply reviewed migrations to production as part of a documented release process. Supabase recommends connecting GitHub and automating deployment from the production branch; branching can support preview migration tests where available.
- Keep environments distinct: maintain separate local, staging, and production environments, and verify which project a deployment targets before applying changes.
Repository integration and automation make a workflow repeatable; they do not make every migration safe. Review and staging validation remain necessary.
What happens if production data needs restoring?
Decide what recovery means for your app before launch. Supabase’s database overview describes daily database backups managed by Supabase and Point-in-Time Recovery (PITR) on paid plans. Database backups do not include objects stored through the Storage API, so a database restore alone should not be assumed to restore uploaded files.
| Recovery option | What the documentation establishes | Decision to make |
|---|---|---|
| Managed daily database backups | Supabase manages daily database backups. The database overview does not make these a backup of Storage API objects. | Check the plan’s applicable retention and restore process, and separately determine how uploaded objects are protected. |
| PITR | Supabase lists PITR as available on paid plans. The production checklist recommends considering it if the database is expected to exceed 4 GB. | Choose it based on the required recovery point and recovery time, plan availability, and retention—not the size recommendation alone. |
Write down the maximum acceptable data loss (recovery point objective) and the time the app can be unavailable (recovery time objective). Confirm the applicable plan and retention, identify protection for Storage objects, and rehearse a restore in a non-production environment. A backup feature is useful only if its scope and restore procedure meet those requirements.
Availability also includes plan behavior. Supabase’s production checklist says Free Plan projects with low activity over a seven-day period may be paused. Verify current plan terms and behavior against the service expectations for your application.
Can the app handle expected traffic and abuse?
There is no responsible universal capacity number for a Supabase app: the result depends on its query patterns, project compute, disk, connections, and traffic shape. Validate against your own workload rather than assuming a successful prototype predicts launch capacity.
Test workload, not just a page load
- Review the Performance Advisor and Security Advisor and address findings relevant to the application.
- Index columns used by common filters, joins, and ordering; inspect slow queries to find work that a successful small-data test may conceal.
- Load test in staging with representative requests, data volumes, and expected launch traffic. Supabase names k6 as one possible load-testing tool.
- Review project-specific compute, disk, database connections, and query behavior while the test runs. Use those observations to plan capacity and investigate bottlenecks.
Check authentication and email safeguards
Review authentication rate limits, CAPTCHA or other bot protection, and transactional email setup. Limits and defaults can change, so check the live project settings and current Supabase documentation rather than relying on a number copied from an older guide. Supabase’s checklist includes an OTP expiry recommendation of 3,600 seconds (one hour) or lower; confirm the current recommendation and the setting appropriate to your sign-in flow before applying it.
How will you know when production is unhealthy?
Monitoring should answer both “What failed?” and “Who will respond?” Supabase’s observability guidance describes Logs, database inspection and statistics, the Metrics API, advisors, and dashboards spanning API, Auth, Storage, Realtime, and database signals.
- Choose error and capacity alerts that correspond to user impact and operational limits; assign an owner and response path for each.
- Watch authorization failures as well as latency, resource use, and service errors. A sudden rise in denied requests may indicate an attack, a broken policy, or a client release using the wrong access pattern.
- Use logs to investigate individual failures and metrics or database statistics to identify broader trends. Review advisor findings rather than waiting for a user-visible incident.
- Schedule recurring health, security, performance, and resource reviews so problems that develop gradually are not lost between launches.
Production hardening is an operating loop: observe the app, investigate deviations, correct the underlying cause, and verify the fix without weakening data access or bypassing the migration process.
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