Change id column name in cakephp(in the Db the id column has different name)

Question

I know i have to declare the unique column(PK) with ID.But the database is already exist, and was created with a different name(Reg_name) than ID.How can i set in cakephp to use Reg_name insted of id?

Answer 1

var $primaryKey = 'example_id';