rubyonrailsin

I guess my question is this: if you declare that 'a has_one b', is it a
requirement that you must also state 'b belongs_to a' (i.e. can you have
a 'has_one' without a corresponding 'belongs_to' ?). If this requirement
holds true and I state that a prediction has_one race, then I must also
state that a race belongs_to a prediction. I may be mistaken here, but
this wouldn't allow me to retrieve all of the predictions associated
with a given race (and a race doesn't really belong to a prediction).

Mr. Ed :-)

Aldric Giacomoni wrote:
> Mr Horse wrote:
>> Thanks for the advice Aldric. This approach makes sense, but I get a
>> little confused with the relationship between predictions and races.
>>
>> A prediction has_one race, but does this mean that a race must belong_to
>> a prediction? While the first statement is correct (a prediction has_one
>> race), a race has many predictions associated with it. Is it possible to
>> state that a "race has_many predictions" as well as saying that a
>> "prediction has_one race"?
>>
>> I could say that a race has_many predictions and a prediction belongs_to
>> a race, but it makes more sense to me to think of a prediction having a
>> race as opposed to the other way around (a prediction belonging to a
>> race).
>>
>> Eddie
>
> A horse is a horse, of course of course... Oh, sorry. I was distracted.
>
> A prediction definitely doesn't belong to a race ;-)
> And a race doesn't belong_to a prediction because there's no foreign key
> for prediction in the race, is there?

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