n8n-nodes-deeptech-data-validation

!n8n Community Node
!License

A powerful n8n node to validate, clean, and route your data using the JSON Schema standard. Ideal for securing your workflows and ensuring data quality before processing.

Developed by DeepTech IA.

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✨ Key Features

* Robust Validation: Uses the standard Ajv engine (supports JSON Schema Draft 7+).
* Data Cleaning (Coercion): Can automatically convert types (e.g., "123" string becomes 123 number) using "Lenient" mode.
* Smart Routing: Automatically separates data:
* ✅ Output 1: Valid Items.
* ❌ Output 2: Invalid Items (with full error details).
* Advanced Formats: Natively validates emails, dates, URLs, IPs, etc.

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🚀 Installation

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1. In your n8n instance, go to Settings > Community Nodes.
2. Click on Install.
3. Search for the package name: n8n-nodes-deeptech-data-validation.
4. Install and wait for the reload.

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Add this command to your Dockerfile or install it in the ~/.n8n volume:

``bash
npm install n8n-nodes-deeptech-data-validation
`

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🛠 Usage Guide

1. Add the Data Validation node to your workflow.
2. Connect your data source (e.g., Webhook, Typeform, Google Sheets).
3. Configure your validation rules in the node panel.

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| Parameter | Option | Description |
| :--- | :--- | :--- |
| JSON Schema | JSON | The schema defining the expected structure of your data. |
| Validation Mode | Strict | Data must match exactly (e.g., a number must be a number). |
| Validation Mode | Lenient | Attempts to coerce types (e.g., "true" string becomes boolean true). |
| On Error | Route | Sends invalid items to the "Invalid" output (does not stop the workflow). |
| On Error | Stop | Stops the workflow immediately if an error is detected. |

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📚 Schema Cookbook

Copy and paste these schemas directly into the node.

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Checks that an email is valid and the name exists.

`json
{
"type": "object",
"properties": {
"name": { "type": "string", "minLength": 2 },
"email": { "type": "string", "format": "email" },
"age": { "type": "integer", "minimum": 18 }
},
"required": ["name", "email"]
}
`

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Validates a product with tags and a positive price.

`json
{
"type": "object",
"properties": {
"sku": { "type": "string", "pattern": "^[A-Z]{3}-\\d{3}$" },
"price": { "type": "number", "exclusiveMinimum": 0 },
"tags": {
"type": "array",
"items": { "type": "string" },
"minItems": 1
},
"inStock": { "type": "boolean" }
},
"required": ["sku", "price"]
}
`

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An address object inside a profile.

`json
{
"type": "object",
"properties": {
"username": { "type": "string" },
"contact": {
"type": "object",
"properties": {
"phone": { "type": "string" },
"address": {
"type": "object",
"properties": {
"city": { "type": "string" },
"zip": { "type": "string", "pattern": "^\\d{5}$" }
},
"required": ["city"]
}
}
}
}
}
`

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❓ Troubleshooting & Support

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Check the output of the "Invalid Items" branch. Each object contains a special _validationErrors field explaining exactly why:
`json
{
"name": "Bob",
"email": "bob-at-gmail.com",
"_validationErrors": [
{
"path": "/email",
"message": "must match format \"email\""
}
]
}
``

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For any questions, suggestions, or enterprise support:
📧 Email: deeptech.fr.ia@gmail.com

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Generated with ❤️ by DeepTech IA for the n8n community.