Line 42 is line 4 in this gist

gistfile1.java

    @Override
    public boolean attach(Model model) {

        Integer affected
                = dataSource
                .update(baseModel.getTable())
                .setValue(columnName, model.getId())
                .only(criteria()
                        .where(baseModel.getIdField(), "=", baseModel.getId()))
                .x();


        return affected == 1;
    }
    
ERROR!
java.lang.NullPointerException
at com.fresh.core.relationships.HasOne.attach(HasOne.java:42)