Thanks! I think I understand it now!

Mark

On Wed, May 23, 2012 at 8:00 AM, Simone Federici <s.feder...@gmail.com>wrote:

> On Wed, May 23, 2012 at 4:40 PM, Mark Phillips <m...@phillipsmarketing.biz
> > wrote:
>
>> Now, can you please explain why it worked? What does the related_name do
>> and why do I need it?
>
> When you define a ForeignKey, django creates dinamically a reverse
> relationship.
>
> take this example:
> A
> B.a -> A
>
>
> from an instance of b = B()
> you can arrive to the related instance of A by b.a
>
> but you can also from the instance of a = A()
> retrieve all instace related of B by a.b_set()
>
> but if in a model there are two or more relationship versus the same model
> the names clashed! and Django ask you to give their names by related_name
> property.
>
> in your code:
>
> t = Team()
>
> this give you all games where the team was the home team
> t.homegame_set.all()
>
> this give you all games where the team was the visitor team
> t.vititorgame_set.all()
>
>
> by default
> t.game_set clash!
>
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