The backend layer of a Lovable build, from first table to locked-down row level security and the errors that appear along the way.
8 min read
Define the parent record, ownership, delete behaviour and access policy for Supabase relationships before you build the screen that uses the data.
Start a Lovable database with a small, explicit schema: model the product's nouns, define relationships and secure each table before wiring the UI.
Row level security decides which authenticated or anonymous requests may read and change each row. A table can exist and still return permission errors if grants and policies do not match the request.
Lovable form submits but data is missing? Test the full path: payload, database grants, row level security, response handling and follow-ups.
Storage and realtime are separate capabilities from ordinary database queries. Prove the base table or bucket access first, then add the subscription or file policy with the smallest scope possible.
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