@GuillaumeGautreau, thanks for your response!
I’ve created a smart relationship with job just to test it out.
In fact, we want to add a table, that will have a ‘1-to-1’ relationship with Job, but won’t have any relationships with Leads.
As I understand, there’s no such option is sequelize to setup a ‘1-to-1 through’ relationship. It’s only ‘many-to-many’ relationship, that supports junction table. ‘Many-to-many’ cannot be used for Forest Admin filtering purposes either.
So, our solution was to imitate ‘1-to-1 through’ with the help of Smart relationship.