To create roles and permission dynamically in ruby on rails

I am working on a Ruby on rails project.

There are 5 Tables such as user table; role table; permission table; user_permission table; and role_user table.

Using a Current User ID,

Here Super Admin should able to create roles and permissions dynamically, i tried using cancan gem but getting error and not working properly,Is there any other solution for this, or can we create it without using any gems?

Kindly tell me any suggestion as i am a beginner

These are the model

User model

has_many :role_users has_many :roles, through: :role_users

validates :email,:presence => true

RoleUser model

belongs_to :user

belongs_to :role

Role model

has_many :role_permissions has_many :role_users has_many :users, through: :role_users has_many :permissions, through: :role_permissions

validates :name, presence: true

RolePermission model

belongs_to :permission belongs_to :role

---

Permission Model

has_many :permission_actions has_many :role_permissions has_many :roles, through: :role_permissions validates :subject_class, presence: true validates :action, presence: true