Rolify
Role management library for Ruby on Rails — adds flexible role-based access control with resource-scoped roles. Rolify features: `rolify` macro on User model adds has_and_belongs_to_many :roles, `resourcify` on resource model enables resource-scoped roles, `user.add_role :admin` (global role), `user.add_role :editor, Agent` (class-scoped), `user.add_role :owner, @agent` (instance-scoped). Querying: `user.has_role? :admin`, `User.with_role :editor, Agent`. Integrates with CanCanCan and Pundit for authorization policy evaluation. Roles stored in roles table with optional resource_type/resource_id for scoping.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Role assignment is a privileged operation — protect add_role endpoints with authorization checks; never expose role assignment to unauthenticated or unauthorized agent users. Rolify role names are strings stored in DB — validate against whitelist to prevent arbitrary role creation. Resource-scoped roles require careful access control on role assignment.
⚡ Reliability
Best When
Your Rails agent platform has multiple user roles that need to be scoped to specific resources — Rolify provides flexible global, class-level, and instance-level role management with database persistence.
Avoid When
You only have 2-3 hard-coded roles (use an enum on the User model), you need attribute-level permissions, or you're not on Rails.
Use Cases
- • Agent platform role assignment — user.add_role :admin (platform admin), user.add_role :creator, Agent (can create any agent), user.add_role :owner, @agent (owns specific agent); Rolify enables three-tier role model in one gem
- • CanCanCan integration for agent RBAC — Rolify roles drive CanCanCan Ability class: can :manage, Agent if user.has_role? :admin; can :manage, Agent, user_id: user.id if user.has_role? :creator, Agent; clean separation of role storage from authorization logic
- • Agent team membership with roles — user.add_role :reviewer, @project assigns user as reviewer on specific project; User.with_role(:reviewer, @project).each for listing team members; resource-scoped roles model agent team collaboration
- • Dynamic agent permission UI — user.roles.map(&:name) lists all user roles for permission display; user.has_role?(:owner, @agent) gates destructive agent operations; Rolify queries enable permission-based UI rendering
- • Bulk role queries for agent admin — User.with_role(:admin) returns all admin users; Agent.with_role(:owner, user) returns all agents a user owns; efficient role-based queries for agent platform administration
Not For
- • Attribute-level permissions — Rolify manages roles, not field-level access; for agent API responses that vary by role (hide certain fields), combine Rolify with Pundit or custom serializer logic
- • Non-Rails projects — Rolify is ActiveRecord/Rails-specific; for non-Rails Ruby agent services, implement custom role management or use a policy library
- • Complex permission rules without authorization layer — Rolify stores roles but doesn't evaluate permissions; always combine with CanCanCan or Pundit; using Rolify alone without an authorization layer just gives you role storage
Interface
Authentication
Role management library — works with any authentication system. Roles are assigned by application logic; protect role assignment endpoints from unauthorized access.
Pricing
Rolify is MIT licensed. Free for all use.
Agent Metadata
Known Gotchas
- ⚠ N+1 role queries without eager loading — user.has_role? in views/serializers for each agent in list triggers per-agent SQL query; use User.with_role eager loading or preload roles with user.roles.load before rendering agent list; Rolify does not auto-eager-load roles
- ⚠ resourcify must be added to resource model — user.add_role :owner, @agent only works if Agent model includes resourcify; without resourcify on Agent, resource-scoped role creation fails silently or raises undefined method error for agent resource roles
- ⚠ Role name is a string, not symbol in DB — add_role :admin and add_role 'admin' are equivalent but Role.where(name: :admin) fails; use Role.where(name: 'admin').to_s or Rolify's has_role? method; direct Role queries in agent admin must use string role names
- ⚠ Rolify migration creates roles and users_roles tables — running rolify generator without running migration causes all Rolify calls to fail; in multi-tenant agent deployments, ensure migration runs on all tenant databases (if using apartment/acts_as_tenant schema separation)
- ⚠ Strict mode prevents typo roles — Rolify 6.x added strict mode validation; without rolify strict: true and explicit role name registration, typo role assignments silently create new role records; configure Rolify.configure with valid_roles list to prevent phantom agent role names
- ⚠ Clearing roles must use remove_all_roles — user.roles.delete_all bypasses Rolify callbacks and leaves orphaned role records; use user.remove_all_roles to correctly clean up resource-scoped roles; direct roles table manipulation corrupts Rolify's resource association tracking
Alternatives
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Scores are editorial opinions as of 2026-03-06.