56 lines
2.7 KiB
PL/PgSQL
56 lines
2.7 KiB
PL/PgSQL
-- Migration 023: Fix cart availability check
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-- Replaces unreliable client-side product_stops query with a
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-- SECURITY DEFINER RPC that bypasses RLS and returns structured availability.
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--
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-- The cart page's availability check was:
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-- 1. Unreliable — anon/frontend query may be blocked by RLS or return empty
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-- 2. Conflating "no rows" with "product is unavailable"
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-- 3. Blocking all stops even when the query itself failed
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--
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-- This adds: check_stop_product_availability(p_stop_id, p_product_ids)
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-- Returns: { product_id, is_available }[] for each requested product.
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-- The cart page uses this to show truly incompatible items separately
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-- from query errors.
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-- ═══════════════════════════════════════════════════════════════════════════
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-- 1. check_stop_product_availability RPC
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-- ═══════════════════════════════════════════════════════════════════════════
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CREATE OR REPLACE FUNCTION public.check_stop_product_availability(
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p_stop_id UUID,
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p_product_ids UUID[]
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)
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RETURNS JSONB
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LANGUAGE plpgsql SECURITY DEFINER SET search_path = public
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AS $$
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DECLARE
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v_result JSONB := '[]'::JSONB;
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v_pid UUID;
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BEGIN
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FOR v_pid IN SELECT unnest(p_product_ids)
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LOOP
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v_result := v_result || jsonb_build_array(jsonb_build_object(
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'product_id', v_pid,
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'is_available', EXISTS(
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SELECT 1 FROM product_stops
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WHERE stop_id = p_stop_id AND product_id = v_pid
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)
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));
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END LOOP;
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RETURN v_result;
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END;
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$$;
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-- ═══════════════════════════════════════════════════════════════════════════
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-- 2. Update cart/page.tsx to use the RPC + show query errors distinctly
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-- (done in the application code, not the migration)
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-- ═══════════════════════════════════════════════════════════════════════════
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--
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-- Changes to src/app/cart/page.tsx:
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-- - handleStopSelect: POST to check_stop_product_availability RPC instead of
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-- direct product_stops query. Handle errors distinctly from unavailability.
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-- - Add availabilityError state — if RPC fails, show "Unable to verify
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-- availability" but allow checkout to proceed (server will catch true errors).
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-- - Add per-product availabilityError flag to distinguish query failure
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-- from confirmed unavailability. |