How do you integrate Supabase with a Lovable project?

Lovable Cloud is the default on new projects: it provisions a managed Supabase project, injects environment variables into the editor, and automatically syncs Postgres types with the TypeScript client. It is the option recommended by the official Lovable documentation for most use cases.

Connecting an existing Supabase project remains possible via editor settings, useful if a company already runs a production Supabase base, has data-residency constraints, or has a team managing its own Supabase project independently of Lovable.

Across our projects delivered in 2025-2026 (scope: 40+ Lovable Web Agency builds), over 90% start with Lovable Cloud; connecting an external Supabase stays marginal and reserved for migrations or specific compliance constraints.

Supabase groups five layers — Auth, Postgres/RLS, Storage, Edge Functions, Realtime. Lovable automates technical provisioning and frontend wiring (typed client, forms, API calls generated from the prompt) but leaves business-rule definition to the team: which RLS policies, which edge function logic, which storage buckets and permissions.

The table below details, layer by layer, what Lovable sets up on its own and what still needs to be written or reviewed by a developer.

Create your tables via Lovable migrations, always enable Row-Level Security on every client-exposed table, and write explicit policies for each operation (select, insert, update, delete) rather than one generic policy.

Store user roles in a dedicated user_roles table separate from profiles, to prevent a user from self-assigning a role by editing their own row. A security-definer has_role() function encapsulates the check and avoids the RLS recursion loops Postgres refuses to execute.

Supabase Auth covers email/password, magic link, OAuth (Google, GitHub, etc.) and SSO. In production, disable uncontrolled anonymous sign-ups and enable email confirmation when the use case requires it.

To retrieve user data on the frontend, create a profiles table linked to auth.users.id: never place a direct foreign key on the auth schema, which is reserved for Supabase.

Every schema change requested in the Lovable editor generates a versioned SQL migration applied automatically. You can review the migration history and roll back in case of a structural mistake.

On complex schemas (multiple relations, strong business constraints), have a developer review generated migrations before going live: Lovable produces a functional structure, but index and constraint optimization remains human work.

All sensitive logic (Stripe payments, third-party API calls, AI processing) must live in Supabase edge functions, never on the client where code is visible in the browser.

Secrets (API keys) are stored in Supabase configuration and injected at edge function runtime. Never commit them to source code nor expose them in a frontend environment variable (VITE_ prefix or equivalent).

Supabase offers automatic backups whose frequency and retention depend on the pricing plan (see https://supabase.com/pricing): the free plan has no point-in-time recovery, paid plans add daily backups and higher tiers add point-in-time restoration.

For a critical project, complement this with scheduled exports (pg_dump) or replication, and regularly test a full restore rather than assuming the backup works.

Docart app: Supabase auth (email + magic link), per-user RLS document tables, edge functions for AI classification via Lovable AI Gateway, Stripe subscriptions via edge function webhooks, Supabase storage for uploaded files.

Delivered end-to-end in 96 hours by Lovable Web Agency, under the Scale package (€10,000 excl. tax, unlimited pages + 1 month of support).