Joining Multiple table to fetch email id

I have 3 models

aff.rb

has_many :tic_affs, inverse_of: :aff, dependent: :restrict_with_exception
has_many :tic, through: :tic_affs

tic.rb

has_one  :tic_aff, inverse_of: :tic, dependent: :restrict_with_exception
has_one  :aff, through: :tic_aff

use.rb

has_one :aff, inverse_of: :use, dependent: :restrict_with_exception
has_many :tics, class_name: "Tic"

i want to fetch email id from user table using joins could any one please help me in framing the Rails query

This is the query i wrote to fetch email id's

select users.email 
from ticket_affiliates 
FULL OUTER JOIN affiliates ON ticket_affiliates.affiliate_id=affiliates.id 
JOIN users ON affiliates.user_id=users.id;

if this query is right help me framing this into rails query