访问ForeignKey直接在Django的模板中设置 [英] Access ForeignKey set directly in template in Django

问题描述

我有这个简化的模型：

class Item(models.Model):
    name = models.CharField(max_length=120)

class ItemImage(models.Model):
    image = models.ImageField(upload_to='upload_dir')
    item = models.ForeignKey(Item)

项目可以有很多 ItemImages 。我还有一个模板从视图中呈现以下数据集：

An Item can have many ItemImages. I also have a template rendering the following data set from the view:

items = Item.objects.all()

所以现在我想在模板中做这样的事情：

So now I would want to do something like this in the template:

{% for item in items %}
<div>
    {{ item.name }}<br>
    <img src="{{ item.itemimage_set.all()[0] }}">
</div>
{% endfor %}

但显然这是不可能的。

But obviously that's not possible. Not from the template directly, at least.

在模板中获得相当于第一个图像的正确方法是什么？

What is the proper way to get the equivalent of the first image inside the template?

推荐答案

{% with item.itemimage_set.all|first as image %}
  <img src="{{ image.url }}" />
{% endwith %} 

这篇关于访问ForeignKey直接在Django的模板中设置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！