Question

I have two tables, Table A and Table B.

Now table A has A.id and B has B.id whereby B.id is the foreign key to link with A.id

Now my problem is, A has A.extraid that “HAS” many rows in B wherein the column name is B.notsamextraid. In other words, the values of B.notsamextraid matches the values of A.extraid

What should I do in order to have Yii match these two columns wherein they both have different names ?

(I am not authorize to alter the name of B.notsamextraid into B.extraid)

Answer 1

The Yii documentation says DO define foreign-key relationships in the database schema.

Can you try out the following tables? Yii should be able to pick up both foreign keys:

create table a (
  id      int not null primary key,
  extraid int not null unique
);

create table b (
  id            references a(id),
  notsamextraid references a(extraid)
);

Edit: To find out if there are already foreign keys between two tables, you can use the following query. It’s not the prettiest query on the planet, but then there is copy and paste 🙂

select t1.owner, t1.constraint_name, t1.constraint_type, t1.table_name, c1.column_name,
       t2.owner, t2.constraint_name, t2.constraint_type, t2.table_name, c2.column_name
  from all_constraints  t1
  join all_cons_columns c1
    on t1.constraint_name=c1.constraint_name
   and t1.owner=c1.owner 
   and t1.table_name=c1.table_name
  join all_constraints  t2
    on t1.owner=t2.owner
   and t1.r_constraint_name=t2.constraint_name
  join all_cons_columns c2
    on t2.constraint_name=c2.constraint_name
   and t2.owner=c2.owner 
   and t2.table_name=c2.table_name
   and c1.position=c2.position
 where t1.constraint_type = 'R'
   and t1.table_name in ('A','B');