dang-rpc-diagnosis

An empty Supabase RPC response often stems from database-side issues like RLS policies blocking access or faulty filter logic, not frontend code. Diagnosing the database layer isolates the root cause before modifying application logic.

To debug Supabase query paths returning erroneous data, investigate the data contract by isolating root causes like join conditions, response shape mismatches, and auth context, ensuring the database returns the expected output before frontend changes.

Response shape mismatches in Supabase REST queries occur when the data structure returned by the database layer fails to align with the expected frontend data contract, requiring diagnosis of the underlying RPC to resolve the discrepancy.

Yes, diagnosing Supabase RPC data discrepancies requires Supabase project access and an understanding of the failing data contract to effectively isolate issues within RLS policies, filter logic, and join conditions.

Isolating RLS policy issues involves checking the database layer to see if authentication context restricts the query results, returning an empty set instead of the expected data, which prevents unnecessary frontend code changes.

Avoid frontend debugging when a Supabase REST query returns incorrect data due to database-side issues, as the problem likely originates from RLS policies, filters, or joins that must be isolated at the database level first.