rails-authorization-cancancan

Centralize Rails authorization by defining all permission rules in a single Ability class using CanCanCan. This approach keeps role-based access control predictable and testable across controllers, views, and API endpoints.

Scope ActiveRecord queries based on user permissions by applying the accessible_by method in your controllers. This automatically filters collections to only include records the current user is authorized to read.

Hide links and UI elements based on user roles by using the can? and cannot? view helpers in your Rails templates. This prevents displaying unauthorized actions to users before they attempt to trigger them.

CanCanCan supports multi-tenancy and attribute-level restrictions through advanced Ability class patterns. You can enforce rules based on tenant associations, time or state conditions, and restrict access to specific model attributes.

Test authorization rules in Ruby on Rails by writing RSpec examples that verify Ability class permissions and accessible_by scoping. This ensures your RBAC rules correctly enforce access control across your application resources.

Handle CanCanCan collection query performance by implementing caching strategies and eager loading associations. This optimizes permission checks on large datasets and prevents N+1 query issues during resource authorization.