enterprise-patterns

Create an SLA DocType with response_time and resolution_time per priority, then set response_by and resolution_by on document creation using after_insert. Run a scheduled job to compare current time against deadlines and mark breaches.

Always re-check permissions inside whitelisted methods using frappe.has_permission with the loaded document, and throw frappe.PermissionError when denied. Combine User Permissions with permission_query_conditions hooks for list-level filtering.

Workflow DocType provides role-based state transitions with custom states, while docstatus offers a fixed Draft (0), Submitted (1), Cancelled (2) lifecycle. Use Workflow for flexible approval chains and docstatus for submit/cancel semantics.

Use frappe.db.get_value with for_update=True to acquire row locks during concurrent updates. For background jobs, use Redis-based distributed locks so only one job instance runs at a time.

SLA errors usually come from mixing timezones. Store and compare all datetimes in UTC, and use frappe.utils.convert_utc_to_timezone only for display. Also account for support hours and holidays when computing due dates.

Use frappe.enqueue for any long-running work such as bulk record operations, external API syncs, or report generation, since web requests will time out. Choose short, default, or long queues based on expected duration.