I try to sort a post list in Django. I read that you have to use .order_by('-fecha') . I have tried the following in the template:
{% for post in persona.post_set.all.order_by('-fecha') %}
{{ post.texto }}<br>
{% endfor %}
But it returns this error:
Could not parse the remainder: '(-date)' from 'person.post_set.all.order_by (-date)'
How could I sort the post so that the last post that was posted is the first one?
You have several options.
If it makes sense that your posts are always sorted by date, you can indicate it in the model itself.
class Post(Model):
# ...
fecha = DateTimeField(...)
class Meta:
# sort by "fecha" in descending order unless
# overridden in the query with order_by()
ordering = ['-fecha']
Another option is to create a property in the model that allows you to get the ordered posts:
class Persona(models.Model):
# ...
@property
def sorted_post_set(self):
return self.post_set.order_by('-fecha')
Another option is to pass to the template a list of already ordered posts instead of a queryset.
def persona_view(request, persona_id):
persona = Persona.objects.get(pk=persona_id)
ordered_posts = persona.post_set.order_by('-fecha')
context = {'persona': persona, 'ordered_post': ordered_post}
return render(request, 'myapp/persona_template.html', context)
The easiest thing is to manage that part in the view.py
personas = Persona.objects.all().order_by('-fecha')
and you send the result persona to your template .html to be able to iterate
{% for p in personas %}
<p>{{ p.texto }}</p>
{% endfor %}