Explain Laravel Polymorphic Relations
http://laravel.com/docs/eloquent#polymorphic-relations
Polymorphic relations allow a model to belong to more than one other
model, on a single association. For example, you might have a photo model
that belongs to either a staff model or an order model.
I don't really understand this use case. Does this mean that a member of
staff could own a photo, or the photo could be placed in an order? Why not
just put photo_id in staff table and photo_id in order table?
Could somebody please provide an alternative, simple to understand,
example where polymorphic relations may be used?
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