laravel - Complicated Eloquent Relationships -

i have many-to-many relationship, users , roles, have worked out fine. however, have table relate well, called leads. user , user's role can assigned lead.

so example, i've created role , let's call 'manager'. now, when managing users, i'd need able assign different users different roles many-to-many relationship (a role can have many users, user can have many roles). assign role of 'manager' user a.

now, when modifying leads, i'd able assign role_user lead (in example, i'd assign user lead), i'd first need assign role lead (manager), , able assign user of role lead.

currently, i've got many-to-many relationship setup users , roles, using pivot table name role_user. i've got many-to-many relationship setup on pivot table, role_user, , leads, using pivot table named lead_role_user.

models + controller - http://paste.laravel.com/d6h

my error: call undefined method illuminate\database\query\builder::roles()

it feels though making more difficult should be.