Dynamic N8N Form Dropdowns With Google Sheets
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Automate your n8n forms by dynamically populating dropdown fields directly from a Google Sheet. This workflow ensures your forms always present the most current options without manual intervention, saving time and improving data accuracy.
About This Workflow
Tired of manually updating form dropdowns? This powerful n8n workflow provides a robust solution to create self-updating forms. It connects to your Google Sheet (or any other data source like an API or database), fetches the latest values, and automatically updates the dropdown options in your n8n form. The workflow fetches its own definition, modifies the form trigger's dropdown field, and then updates itself. This continuous synchronization ensures that your users always interact with the most current data, making it ideal for managing product lists, service offerings, department selections, and more. Set it to run on a schedule, and your forms will practically manage themselves.
Key Features
- Automated Dropdown Population: Dynamically fetch and update dropdown options in your n8n forms from external data sources.
- Google Sheets Integration: Seamlessly connect to Google Sheets as a data source for your dropdown values (easily swappable with other sources).
- Self-Updating Workflow: The workflow intelligently retrieves, modifies, and updates its own definition to apply changes without manual re-deployment.
- Configurable Schedule: Set the frequency for data synchronization to ensure dropdowns are always current.
- Flexible Data Source: Easily adapt to use other data sources like APIs, databases, or CRM systems instead of Google Sheets.
How To Use
- Configure Google Sheets Trigger:
- Connect your Google Sheets account.
- Specify the
Document IDandSheet Namewhere your dropdown values are stored. - Set the
Poll Times(e.g.,everyMinute) to define how often the dropdown values should be updated.
- Adjust "Write JSON" Node (if necessary):
- Ensure the JavaScript code correctly extracts your data and formats it into an array of objects like
[{ option: "Your Value" }]. The current code expects a field namedvalue.
- Ensure the JavaScript code correctly extracts your data and formats it into an array of objects like
- Configure "On form submission" Node:
- Set your
formTitle. - Ensure you have a
dropdownfield withinformFieldsthat this workflow will update. This workflow is designed to update a single dropdown field. - Important: For testing, remember that n8n forms often require
Production Modeto be enabled.
- Set your
- Connect n8n API Credentials:
- Ensure the "n8n | get wf" and "n8n | update" nodes have valid n8n API credentials configured to allow the workflow to read and write its own definition.
- Activate and Test:
- Run the workflow to initiate the first update.
- Check your n8n form to see the dynamically populated dropdown.
- Make changes in your Google Sheet and observe the form updating on the next scheduled run.
Apps Used
Workflow JSON
{
"id": "39a3f261-ad61-453c-97c7-f32047553392",
"name": "Dynamic N8N Form Dropdowns With Google Sheets",
"nodes": 15,
"category": "Operations",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
Get This Workflow
ID: 39a3f261-ad61...
About the Author
SaaS_Connector
Integration Guru
Connecting CRM, Notion, and Slack to automate your life.
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