Support for substituting one column with multiple values through QSqlRelationalTableModel

CREATE TABLE author 
( 
   id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
   firstname varchar(40) NOT NULL,
   surname varchar(40) NOT NULL
);

CREATE TABLE book 
( 
  id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
  title varchar(40),
  price numeric(10,2),
  authorid integer,
  notes varchar(255), 
  FOREIGN KEY (authorid) REFERENCES author(id)
);