The workflow JSON
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{
"name": "expressions",
"nodes": [
{
"parameters": {},
"type": "n8n-nodes-base.manualTrigger",
"typeVersion": 1,
"position": [
0,
0
],
"id": "a66b9688-2a93-4923-aecd-6293d8ef69da",
"name": "When clicking \u2018Execute workflow\u2019"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "760b2ee1-c89d-4d1b-b340-bc7f490d3583",
"name": "first_name",
"value": "=rhys",
"type": "string"
},
{
"id": "b42af0d9-fce7-4133-860b-5da5bc273490",
"name": "sir_name",
"value": "fisher",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
208,
0
],
"id": "e73e4bbb-39cb-4f5f-b62f-b8b174fda180",
"name": "Edit Fields"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "ea863182-233b-46d7-afca-e70d28f85ebe",
"name": "full_name",
"value": "={{ $json.first_name }} {{ $json.sir_name }}",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
416,
0
],
"id": "f1a46a2d-ca13-4e65-b80a-3ac32bb177af",
"name": "Edit Fields1"
},
{
"parameters": {
"content": "## Basic reference\n\n**Pull values from earlier nodes**",
"height": 128
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-304,
0
],
"id": "3fe81d61-8740-43c9-8b9d-4a335dbfbeb1",
"name": "Sticky Note"
},
{
"parameters": {
"content": "## String concatenation:\n\n**Build dynamic messages**",
"height": 128
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-304,
192
],
"id": "08d2564c-6ea2-4c80-a2b2-3e69716bd1fa",
"name": "Sticky Note1"
},
{
"parameters": {
"content": "## Accessing Nested or Array Data:\n\n**Work with deeper structures.**",
"height": 128
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-304,
400
],
"id": "932e587b-75e2-4554-8b7d-07a8bc1090b7",
"name": "Sticky Note2"
},
{
"parameters": {
"mode": "raw",
"jsonOutput": "{\n \"user\": {\n \"id\": 123,\n \"profile\": {\n \"first_name\": \"Aisha\",\n \"last_name\": \"Kumar\",\n \"email\": \"aisha.kumar@example.com\",\n \"location\": {\n \"city\": \"Bangalore\",\n \"country\": \"India\"\n }\n },\n \"roles\": [\n {\n \"name\": \"admin\",\n \"active\": true\n },\n {\n \"name\": \"editor\",\n \"active\": false\n }\n ]\n },\n \"order\": {\n \"id\": \"ORD-9087\",\n \"items\": [\n { \"name\": \"Keyboard\", \"price\": 49.99 },\n { \"name\": \"Mouse\", \"price\": 19.99 }\n ]\n }\n}",
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
208,
416
],
"id": "117cbe69-a2ef-46c0-ba79-43f4eb2a200b",
"name": "Edit Fields2"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "f6489bc6-ebb4-4748-aae9-2df56e087418",
"name": "Get email",
"value": "={{$json[\"user\"][\"profile\"][\"email\"]}}",
"type": "string"
},
{
"id": "2e47cc39-42ed-405d-8e75-ddea1ac0f911",
"name": "Get city",
"value": "={{$json.user.profile.location.city}}",
"type": "string"
},
{
"id": "51cec008-0d14-4bec-a754-0bd9445347f6",
"name": "Get first item name",
"value": "={{$json.order.items[0].name}}",
"type": "string"
},
{
"id": "94be4db3-b706-4893-9a88-42e9731389aa",
"name": "Get second item price",
"value": "={{$json.order.items[1].price}}",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
416,
416
],
"id": "159a696d-99a5-4ac8-803f-0a33bf112666",
"name": "Edit Fields3"
},
{
"parameters": {
"content": "## Doing Calculations or Logic:\n\n**A Set node calculating totals.**",
"height": 128
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-304,
608
],
"id": "0efeced9-e0c8-4b7e-a21f-c1e8e3f5a5d3",
"name": "Sticky Note3"
},
{
"parameters": {
"mode": "raw",
"jsonOutput": "{\n \"item\": \"Keyboard\",\n \"price\": 49.99,\n \"quantity\": 2,\n \"status\": \"paid\"\n}\n",
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
208,
624
],
"id": "7a938288-5ea9-4c9d-8d6d-0b04d3c95f8a",
"name": "Edit Fields4"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "5c6a6c02-267c-4d79-bdd4-330e9a7d20bb",
"name": "Total",
"value": "={{ $json.price * $json.quantity }}",
"type": "string"
},
{
"id": "62c426dd-4c4d-4900-affc-e7f4700e85a4",
"name": "Discounted total (10% off)",
"value": "={{ $json.price * $json.quantity * 0.9 }}",
"type": "string"
},
{
"id": "083feb08-532b-4d84-a6d8-42ac12d6be12",
"name": "Payment label",
"value": "={{ $json.status === \"paid\" ? \"\u2705 Paid\" : \"\u274c Unpaid\" }}",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
416,
624
],
"id": "e499a759-421d-4d7a-8d5d-67e44bd7f809",
"name": "Edit Fields5"
},
{
"parameters": {
"content": "## Working with Dates:\n\n**Transform and compute dates.**"
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-304,
816
],
"id": "32a6f05e-fb27-4dd3-9077-a43fc1eda93c",
"name": "Sticky Note4"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "5eb5511d-ddd8-4cae-8428-48065807e7e0",
"name": "Current Timestamp",
"value": "={{ new Date().toISOString() }}",
"type": "string"
},
{
"id": "96607c17-1a17-4d2b-b702-303f4289ce93",
"name": "Readable Date",
"value": "={{ new Date().toLocaleString() }}",
"type": "string"
},
{
"id": "e551b159-7dc1-472d-863e-3e50a4f48323",
"name": "Due Date (3 days from now)",
"value": "={{ $now.plus({ days: 3 }).toISODate() }}",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
208,
848
],
"id": "c4f6a9db-cdd2-4384-bb5e-e89113d01c25",
"name": "Edit Fields6"
},
{
"parameters": {
"content": "## Functions\n\n**Use JavaScript functions right inside expressions for custom logic.**"
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-304,
1024
],
"id": "2e91616a-bfa0-4eff-800d-6e81be45be48",
"name": "Sticky Note5"
},
{
"parameters": {
"mode": "raw",
"jsonOutput": "{\n \"product\": \"Keyboard\",\n \"price\": 49.99,\n \"taxRate\": 0.2\n}\n",
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
208,
1056
],
"id": "c747f050-ac19-4ba8-839f-b1ed9f8db573",
"name": "Edit Fields7"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "56a9e97a-054f-4a39-bc4d-3bf9568fdd36",
"name": "Price with tax (multi-line)",
"value": "={{ (() => { const price = $json.price; const tax = $json.taxRate; const total = price + (price * tax); return total.toFixed(2); })() }}",
"type": "string"
},
{
"id": "13f3f1d7-452d-4bcc-ae00-d8c7cdcfe5dd",
"name": "Category label",
"value": "={{ (() => { return $json.price > 100 ? \"\ud83d\udc8e Premium\" : \"\ud83d\udca1 Standard\"; })() }}",
"type": "string"
},
{
"id": "2a4e6e12-7009-40c5-a73e-eb9004b4b3c0",
"name": "Price Category with Ranges",
"value": "={{ (() => {\n const price = $json.price;\n if (price > 100) return \"\ud83d\udc8e Premium\";\n if (price > 50) return \"\u2728 Mid-range\";\n return \"\ud83d\udca1 Budget\";\n})() }}",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
416,
1056
],
"id": "4ad71896-e9c9-4add-88af-f4707c4ec32e",
"name": "Edit Fields8"
},
{
"parameters": {
"content": "## Combine Everything\n\n**Mix multiple techniques to create powerful expressions.**"
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-304,
1248
],
"id": "9d54b019-95d2-466b-ae5e-f9e5e93c737e",
"name": "Sticky Note6"
},
{
"parameters": {
"mode": "raw",
"jsonOutput": "{\n \"name\": \"Aisha\",\n \"price\": 49.99,\n \"qty\": 2\n}\n",
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
208,
1264
],
"id": "498bdc36-913f-4adf-88b6-ea8a14cadf0a",
"name": "Edit Fields9"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "2f55ea86-758d-440d-bd72-7235aab2d1eb",
"name": "message",
"value": "={{ `Hi ${$json.name}, your total is $${($json.price * $json.qty).toFixed(2)} due by ${$now.plus({ days: 2 }).toISODate()}.` }}",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
416,
1264
],
"id": "d133fe93-ece0-40de-80a7-3f6e22006ff7",
"name": "Edit Fields10"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "b533aab2-a60e-4b4b-8aa5-ad6da17c2fdc",
"name": "email_header",
"value": "=Hi {{ `${$json[\"first_name\"]} ${$json[\"sir_name\"]}` }}",
"type": "string"
},
{
"id": "af97de74-b23d-424b-b806-2fcee678cd14",
"name": "email_body",
"value": "=If you want to handle missing data safely, add trim like this. \n\n{{ `${$json?.first_name ?? \"\"} ${$json?.sir_name ?? \"\"}`.trim() }}",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
416,
192
],
"id": "70d9d91f-871f-461b-8ec1-6d7ffd2bd9a2",
"name": "Edit Fields11"
}
],
"connections": {
"When clicking \u2018Execute workflow\u2019": {
"main": [
[
{
"node": "Edit Fields",
"type": "main",
"index": 0
},
{
"node": "Edit Fields2",
"type": "main",
"index": 0
},
{
"node": "Edit Fields4",
"type": "main",
"index": 0
},
{
"node": "Edit Fields6",
"type": "main",
"index": 0
},
{
"node": "Edit Fields7",
"type": "main",
"index": 0
},
{
"node": "Edit Fields9",
"type": "main",
"index": 0
}
]
]
},
"Edit Fields": {
"main": [
[
{
"node": "Edit Fields1",
"type": "main",
"index": 0
},
{
"node": "Edit Fields11",
"type": "main",
"index": 0
}
]
]
},
"Edit Fields2": {
"main": [
[
{
"node": "Edit Fields3",
"type": "main",
"index": 0
}
]
]
},
"Edit Fields4": {
"main": [
[
{
"node": "Edit Fields5",
"type": "main",
"index": 0
}
]
]
},
"Edit Fields7": {
"main": [
[
{
"node": "Edit Fields8",
"type": "main",
"index": 0
}
]
]
},
"Edit Fields9": {
"main": [
[
{
"node": "Edit Fields10",
"type": "main",
"index": 0
}
]
]
},
"Edit Fields11": {
"main": [
[]
]
}
},
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "a3d931f4-6a5f-4f99-a129-0e89de7ce0b4",
"meta": {
"templateCredsSetupCompleted": true
},
"id": "x8XH2zwfr1sUa28d",
"tags": [
{
"createdAt": "2025-10-22T10:08:08.425Z",
"updatedAt": "2025-10-22T10:08:08.425Z",
"id": "OUeFbF4k1iaJ8GZr",
"name": "ready"
}
]
}
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About this workflow
expressions. Event-driven trigger; 20 nodes.
Source: https://github.com/BrightPool/ai-agents-udemy-course/blob/102b7ad2f3e474b6700be197649dbbea0aa114cf/n8n/agents/expressions.json — original creator credit. Request a take-down →
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