المشكلة:
عقدة chat trigger لا تُرسل الرسالة إلى العقدة التالية
لكن عندما أُرسل رسالة مباشرة إلى سلسلة Q&A، تُسترجع الإجابة
أستخدم أحدث إصدار من n8n مُستضاف ذاتياً على railway.app عبر صورة docker
الكود:
{
“nodes”: [
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“parameters”: {
“authentication”: “chromaCloudApi”,
“chromaCollection”: {
“__rl”: true,
“value”: “diabetes_care_2026_pdf”,
“mode”: “list”,
“cachedResultName”: “diabetes_care_2026_pdf”
},
“options”: {}
},
“type”: “@n8n/n8n-nodes-langchain.vectorStoreChromaDB”,
“typeVersion”: 1.3,
“position”: [
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-96
],
“id”: “6bcbcabb-1628-4705-acc1-ec69e9cdd2ea”,
“name”: “Chroma Vector Store”,
“notesInFlow”: true,
“credentials”: {
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“name”: “ChromaDB Cloud”
}
}
},
{
“parameters”: {
“options”: {}
},
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“typeVersion”: 1.2,
“position”: [
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-32
],
“id”: “53369344-d75a-4e1b-8cbe-7e330ada84e7”,
“name”: “Embeddings OpenAI”,
“credentials”: {
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}
},
{
“parameters”: {
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“value”: “gpt-4o-mini”,
“mode”: “list”,
“cachedResultName”: “gpt-4o-mini”
},
“builtInTools”: {},
“options”: {
“textFormat”: {
“textOptions”: {
“type”: “text”
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}
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“id”: “85a2a69d-b7f5-43a0-9761-94f58981658e”,
“name”: “OpenAI Chat Model”,
“credentials”: {
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“name”: “OpenAI account”
}
}
},
{
“parameters”: {
“options”: {
“responseMode”: “lastNode”
}
},
“type”: “@n8n/n8n-nodes-langchain.chatTrigger”,
“typeVersion”: 1.4,
“position”: [
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“id”: “2a23a459-2e0a-41e2-b42f-3f7dc8e457ce”,
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“webhookId”: “fb089fe6-d959-4530-8e15-b76291e07d0f”,
“alwaysOutputData”: false
},
{
“parameters”: {},
“type”: “@n8n/n8n-nodes-langchain.retrieverVectorStore”,
“typeVersion”: 1,
“position”: [
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“id”: “8f040c30-62c4-4655-aec0-dd8db30f5575”,
“name”: “Vector Store Retriever”
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{
“parameters”: {
“options”: {}
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“type”: “@n8n/n8n-nodes-langchain.chainRetrievalQa”,
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“position”: [
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“id”: “5abff650-028a-4dae-8859-00b3fc45f1ea”,
“name”: “Question and Answer Chain”
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“connections”: {
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“Embeddings OpenAI”: {
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“OpenAI Chat Model”: {
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}
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“When chat message received”: {
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}
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},
“Question and Answer Chain”: {
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“pinData”: {},
“meta”: {
“templateCredsSetupCompleted”: true,
“instanceId”: “e80c933fa7f4d5967cc2a038c97a89862a2e4ccb4b18372a6ce2a883e1398a68”
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