Generate and Split Sample Data Records Using Javascript and Python

The workflow JSON

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{
  "meta": {
    "templateCredsSetupCompleted": true
  },
  "nodes": [
    {
      "id": "934a8c2f-845f-4f88-8355-48ef17e50f32",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
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      ],
      "parameters": {
        "color": 7,
        "width": 1696,
        "height": 1056,
        "content": "### Create sample records with Code and split to items in n8n (Code + Split Out)\n\nA minimal, plug-and-play workflow that generates **sample data** using n8n\u2019s **Code** node (both JavaScript and Python versions included) and then **fans out** those records into individual items with **Split Out**. Perfect for testing downstream nodes, mapping, pagination, or prototyping list-based logic without connecting to real data sources.\n"
      },
      "typeVersion": 1
    },
    {
      "id": "34f6b8c5-171b-4027-907b-cc8a41bd75a4",
      "name": "Sticky Note10",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
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      "parameters": {
        "width": 400,
        "height": 1056,
        "content": "\n## \u2705 What this template does\n- **Generates 20 sample records** with fields: `index`, `num`, and `test`\n- Writes the array to `item.json.barr`\n- Uses **Split Out** to convert the array into **one item per record**\n- Includes **both JavaScript and Python** implementations side-by-side\n\n---\n\n- \ud83d\udce7 **rbreen@ynteractive.com**  \n- \ud83d\udd17 **Robert Breen** \u2014 https://www.linkedin.com/in/robert-breen-29429625/  \n- \ud83c\udf10 **ynteractive.com** \u2014 https://ynteractive.com\n\n"
      },
      "typeVersion": 1
    },
    {
      "id": "2dab6b4d-2d05-4294-8d6d-620513a777fc",
      "name": "Generate Data Javascript",
      "type": "n8n-nodes-base.code",
      "position": [
        -480,
        2368
      ],
      "parameters": {
        "jsCode": "// In n8n Code node, \"items\" is an array of input objects\n// You must return an array of items at the end\n\nreturn items.map(item => {\n  const arr = [];\n\n  for (let i = 0; i < 20; i++) {\n    arr.push({\n      index: i,\n      num: i + 1,\n      test: \"asdasd\"\n    });\n  }\n\n  // attach to item.json\n  item.json.barr = arr;\n  return item;\n});\n"
      },
      "typeVersion": 2
    },
    {
      "id": "c12e4e24-e1bd-4f32-98fd-876d91e79661",
      "name": "Generate Data Python",
      "type": "n8n-nodes-base.code",
      "position": [
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        2560
      ],
      "parameters": {
        "language": "python",
        "pythonCode": "arr = [{\"index\": i, \"num\": i + 1, \"test\": \"asdasd\"} for i in range(20)]\nreturn [{\"json\": {\"barr\": arr}}]\n"
      },
      "typeVersion": 2
    },
    {
      "id": "5128ea0a-8d3d-49d1-bba2-102881725941",
      "name": "Start Workflow",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        -848,
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      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "50e53b82-2556-4f8a-9b41-ed911d7319cc",
      "name": "Split Out Javascript",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        -272,
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      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "barr"
      },
      "typeVersion": 1
    },
    {
      "id": "ee5064bc-a511-4d63-9cef-67ff348d76a2",
      "name": "Split Out Python",
      "type": "n8n-nodes-base.splitOut",
      "position": [
        -272,
        2560
      ],
      "parameters": {
        "options": {},
        "fieldToSplitOut": "barr"
      },
      "typeVersion": 1
    }
  ],
  "connections": {
    "Start Workflow": {
      "main": [
        [
          {
            "node": "Generate Data Javascript",
            "type": "main",
            "index": 0
          },
          {
            "node": "Generate Data Python",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Generate Data Python": {
      "main": [
        [
          {
            "node": "Split Out Python",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Generate Data Javascript": {
      "main": [
        [
          {
            "node": "Split Out Javascript",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

About this workflow

A minimal, plug-and-play workflow that generates sample data using n8n’s Code node (both JavaScript and Python versions included) and then fans out those records into individual items with Split Out. Perfect for testing downstream nodes, mapping, pagination, or prototyping…

Source: https://n8n.io/workflows/8230/ — original creator credit. Request a take-down →

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