On Thu, Jun 23, 2011 at 10:12 PM, Rich Jones <miserlou@gmail.com> wrote:
Where would _meta need to go?
This code does appear to work the way I am describing it, this is just
a slightly stripped down of a real application I have made.
R
On Jun 23, 4:59 pm, "Cal Leeming [Simplicity Media Ltd]"
--<cal.leem...@simplicitymedialtd.co.uk> wrote:
> I might be wrong here, but I'm fairly sure that the below example you pasted is invalid code (i.e. you need to add a proxy _meta??).
> My apologies if I'm wrong though, as I have never encountered a need to do this before, and just going off vague memory.
> Cal
> On 23/06/2011 19:24, Rich Jones wrote:Other than the convenience of writing them, I can't seem to find any advantages of using model inheritance. Please allow me to explain the trouble I am having with an example. Suppose, class Post(models.Model): title = models.CharField(max_length=200) user_owner_id = models.ForeignKey(User) def __unicode__(self): return self.title class BetterPost(Post): description = models.CharField(max_length=200) def __unicode__(self): return self.title Now, in the template: {% with profile.user.post_set.select_related as posts %} {% for post in posts %} {{post}} {% empty %} No posts! {% endfor %} {% endwith %} {% with profile.user.betterpost_set.select_related as posts %} {% for post in posts %} {{post}} {% empty %} No posts! {% endfor %} {% endwith %} If there are 2 'Posts' and 1 'BetterPost', the template code will print all of the posts in the first loop, then none in the second loop set. So why would I use model inheritance if this is the kind of behavior I can expect? If I can't get a set and can't access the fields, why wouldn't I just copy the fields into BetterPost rather than extending Post? Thank you for reading! R
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