MVP

issue.txt

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+4) Machine cycles: fix cavities read
+
+You currently have:
+
+const cavities = Number(global.get("moldActive") || 0);
+
+
+If moldActive is an object, Number(obj) → NaN.
+
+✔️ Use the property:
+const cavities = Number((global.get("moldActive") || {}).cavities) || 1;
+
+
+Also guard negative produced:
+
+const produced = Math.max(0, totalProduced - scrapTotal);
+
+🧱 5) ID consistency in SQL
+
+In your flow, SQL uses work_order_id. In your start-tracking example inside “Work Order buttons”, you used WHERE id = ....
+
+✔️ Make them consistent (use work_order_id):
+topic: `UPDATE work_orders SET production_start_time = ${now}, is_tracking = 1 WHERE work_order_id = '${activeOrder.id}'`
+
+
+Same consistency in resume/restart and persist queries.
+
+🧰 6) Format Graph Data: keep messages clean to UI
+
+Before returning to the template, strip SQL fields so nothing accidentally loops into DB:
+
+delete msg.topic;
+delete msg.payload;
+return msg;
+
+🧯 7) MariaDB guard
+
+You already create two Switch nodes. Keep the rule:
+
+Property: msg.topic
+
+Rule: is type → string
+
+And wire every DB path through it (graphs fetch + cycles persist). That eliminates the “query is not defined as a string” spam.
+
+✂️ Minimal diffs you’ll likely want
+Machine cycles (core lines)
+const cavities = Number((global.get("moldActive") || {}).cavities) || 1;
+// ...
+const produced = Math.max(0, totalProduced - scrapTotal);
+// ...
+const persistCycleCount = {
+  topic: "UPDATE work_orders SET cycle_count = ?, good_parts = ? WHERE work_order_id = ?",
+  payload: [cycles, produced, activeOrder.id]
+};
+
+Fetch Graph Data (SELECT list)
+msg.topic = `
+  SELECT work_order_id, status, good_parts, scrap_parts, progress_percent,
+         target_quantity, updated_at, cycle_count
+  FROM work_orders
+  WHERE updated_at >= NOW() - ${interval}
+  ORDER BY updated_at ASC
+`;
+
+Format Graph Data (efficiency + cleanup)
+const good = Number(row.good_parts) || 0;
+const target = Number(row.target_quantity) || 0;
+let eff = (row.progress_percent != null)
+  ? Number(row.progress_percent)
+  : (target > 0 ? (good / target) * 100 : 0);
+eff = Math.min(100, Math.max(0, eff));
+efficiencyData.push(eff);
+
+// before return:
+delete msg.topic;
+delete msg.payload;
+return msg;
+
+Work Order buttons (“start-tracking” WHERE clause)
+topic: `UPDATE work_orders SET production_start_time = ${now}, is_tracking = 1
+        WHERE work_order_id = '${activeOrder.id}'`,