init

scripts/db/001_freeze_delivered_sales_orders.sql

@@ -0,0 +1,56 @@
+DO $$
+BEGIN
+    IF NOT EXISTS (SELECT 1 FROM pg_language WHERE lanname = 'plpgsql') THEN
+        CREATE LANGUAGE plpgsql;
+    END IF;
+END $$;
+
+CREATE OR REPLACE FUNCTION trg_block_delivered_sales_orders_head()
+RETURNS trigger
+LANGUAGE plpgsql
+AS $$
+BEGIN
+    IF OLD.status = 'delivered' THEN
+        RAISE EXCEPTION '已交付的销售订单禁止修改或删除';
+    END IF;
+
+    IF TG_OP = 'DELETE' THEN
+        RETURN OLD;
+    END IF;
+    RETURN NEW;
+END;
+$$;
+
+DROP TRIGGER IF EXISTS block_delivered_sales_orders_head ON sales_orders;
+CREATE TRIGGER block_delivered_sales_orders_head
+BEFORE UPDATE OR DELETE ON sales_orders
+FOR EACH ROW
+EXECUTE FUNCTION trg_block_delivered_sales_orders_head();
+
+CREATE OR REPLACE FUNCTION trg_block_delivered_sales_orders_items()
+RETURNS trigger
+LANGUAGE plpgsql
+AS $$
+DECLARE
+    v_status text;
+BEGIN
+    SELECT status INTO v_status
+    FROM sales_orders
+    WHERE id = COALESCE(NEW.order_id, OLD.order_id);
+
+    IF v_status = 'delivered' THEN
+        RAISE EXCEPTION '已交付的销售订单明细禁止变更';
+    END IF;
+
+    IF TG_OP = 'DELETE' THEN
+        RETURN OLD;
+    END IF;
+    RETURN NEW;
+END;
+$$;
+
+DROP TRIGGER IF EXISTS block_delivered_sales_orders_items ON sales_order_items;
+CREATE TRIGGER block_delivered_sales_orders_items
+BEFORE INSERT OR UPDATE OR DELETE ON sales_order_items
+FOR EACH ROW
+EXECUTE FUNCTION trg_block_delivered_sales_orders_items();