对模板中的对象进行排序 [英] Sorting objects in template

问题描述

让这些模型:

class Category(models.Model):
    name = models.CharField(max_length=20)

class Word(models.Model):
    name = models.CharField(max_length=200)
    votes = models.IntegerField(default=1)
    categories = models.ManyToManyField(Category, null=True, blank=True)

此视图:

def main_page(request):
    words = Word.objects.all()
    categories = Category.objects.all()
    return render(request, "main_page.html", {'words': words})

和这个模板:

{% for category in categories %}
    {% for word in category.word_set.all %}
    <p>{{ word }}</p>
    {% endfor %}
{% endfor %}

我想分别按投票数和发布日期对模板中的字词进行排序.我该怎么做?

I'd like to sort words in template by number of votes and by pub date, separately. How can I do this?

推荐答案

您可以制作 自定义模板标签或过滤器，获取词组和排序类型作为参数.

You can make custom template tag or filter, which gets words set and sorting type as parameters.

例如(尚未测试):

custom_tags.py:

from django import template
register = template.Library()

@register.filter
def sort_by(queryset, order):
    return queryset.order_by(order)

template.html

{% load custom_tags %}
...
{% for word in category.word_set.all|sort_by:'-votes' %}
    <p>{{ word }}</p>
{% endfor %}
...

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