erpnext-permissions

Implement secure ERPNext user permissions by applying a deterministic five-layer model covering Role Permissions, User Permissions, Perm Levels, Permission Hooks, and Data Masking. This framework ensures safe, auditable access controls across DocTypes for production deployments.

The best way to restrict access to sensitive fields in Frappe DocTypes is using Perm Levels to enforce field-level security. This approach is part of a deterministic permission pattern that includes deny-by-default rules and query-based filtering to secure customer data.

ERPNext permission hooks work by executing custom logic through has_permission hooks and doc.check_permission before access is granted. They allow you to enforce business rules like denying write access to cancelled documents, creating safe and auditable access controls.

Yes, you can use data masking to enforce security in ERPNext v14 through v16. It operates as the fifth layer of a deterministic permission framework, restricting sensitive field visibility alongside Role Permissions, User Permissions, Perm Levels, and Permission Hooks.

ERPNext get_list filtering may bypass role permissions if proper escaping and query conditions are not applied. To build safe, auditable access controls, you must implement deterministic permission query conditions that enforce deny-by-default and owner-based access rules.

You need custom permission query conditions in an ERPNext app when standard role permissions are insufficient to secure customer data. They provide deterministic query-based filtering and multi-layer permission checks to enforce security across development and production environments.