frappe-impl-serverscripts

Safe Frappe server scripts for document validation enforce required fields, cross-document rules, and business constraints before save or submit. Use sandbox-safe Python patterns, select the correct DocType event, and apply permission checks to prevent unauthorized modifications.

Yes, you can create whitelisted server script methods for lightweight REST actions in Frappe. These endpoints include input validation checks and permission enforcement, providing a quick way to expose APIs without building a custom app.

The best way to run scheduled jobs without a custom app is using Frappe server scripts. They support daily or cron-based tasks for reminders, batch updates, and background maintenance, applying sandbox-safe patterns to ensure stable execution.

You restrict list views by user role in Frappe using permission query server scripts. These scripts filter list views based on user, role, territory, company, or ownership, ensuring users only see documents they are authorized to access.

You should move logic to a custom app controller when it exceeds server script sandbox limits or requires complex imports. Migration guidance helps decide when server scripts are no longer sufficient and hooks or controllers become necessary for stability.

Yes, Frappe server script automation works for auto-fill and calculations by populating derived fields, totals, and status values directly in document events. This allows you to automate data entry logic safely without modifying core application code.