[Dbix-class] Difference between belongs_to and has_one

[Drew Taylor]

One thing I discovered after my post which I think is CRITICAL:
has_one & might_have both use the PK of the local (what's the proper
terminology?) table as the FK into the foreign table. Perhaps saying
something like this for the might_have docs:

"Creates an optional one-to-one relationship with a class, where the
primary key of the foreign class is equal to the primary key of the
local table. Ie. Foo.id == Bar.id. Unlike belongs_to, might_have ONLY
suppports using each tables primary key as the key column."

I'm sure I said that in a very ineloquent way, but hopefully you get the idea.

Drew

On 10/19/06, Lee Standen <nom at standen.id.au> wrote:
> Belongs to is a child -> parent relationship
> Has one is a sibling <-> sibling relationship?
>
> I'm just guessing here.
>
> My response #2 would be that one is an alias for another
>
>
>
> On Thu, 19 Oct 2006, Drew Taylor wrote:
>
> > This morning I was doing some work on relationships and ran into this question:
> > What is the difference between belongs_to and has_one/might_have?
> >
> > They seem VERY similar. AFAICT the fundamental difference is that with
> > belongs_to cascading delete is turned off, while with has_one
> > cascading delete is turned on by default. Is there any other
> > differences between these two?
> >
> > Thanks,
> > Drew
> > --
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-- 
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 Drew Taylor                 *  Web development & consulting
 Email: drew at drewtaylor.com  *  Site implementation & hosting
 Web  : www.drewtaylor.com   *  perl/mod_perl/DBI/mysql/postgres
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