我有一个django模型如下:
class Category(models.Model):
category_name = models.CharField(max_length=250, blank=True, null=True)
class Meta:
verbose_name = "Category"
verbose_name_plural = "Categories"
def __unicode__(self):
return self.category_name
class Product(models.Model):
category = models.ForeignKey(Category)
model_name = models.CharField(max_length=255, blank=True, null=True)
class Meta:
verbose_name = "Product"
verbose_name_plural = "Products"
def __unicode__(self):
return self.model_name
在我的观点中,我有一个ListView如下:
class CategoryList(ListView):
model = Category
template_name = 'categories.html'
我的categories.html如下:
{% extends "base.html" %}
{% block content %}
<div>
<h2>Categories</h2>
{% for category in object_list %}
<div class="panel-group" id="accordion" role="tablist" aria-multiselectable="true">
<div class="panel panel-default">
<div class="panel-heading" role="tab" id="h{{category.id}}">
<h4 class="panel-title">
<a class="collapsed" data-toggle="collapse" data-parent="#accordion" href="#{{category.id}}" aria-expanded="true" aria-controls="{{category.id}}">
{{category.category_name}}
</a>
</h4>
</div>
<div id="{{category.id}}" class="panel-collapse collapse" role="tabpanel" aria-labelledby="h{{category.id}}">
<div class="panel-body">
{{category.category_name}} //trying to change here by displaying all model_names!!
</div>
</div>
</div>
</div>
{% endfor %}
{% endblock %}
现在我试图在模板中显示手风琴内部类别中可用的所有产品的列表(即在面板体中)。如何更改视图以访问这些反向关系?基于类的观点相当新吗?
答案 0 :(得分:2)
您可以使用相关的字段管理器products_set
访问每个类别的相关产品,例如:
{{category.category_name}} //trying to change here by displaying all model_names!!
<ul>
{% for product in category.product_set.all %}
<li>{{ product.model_name }}</li>
{% endfor %}
</ul>
如果您需要更复杂的过滤,您可能希望在视图中执行此操作或编写自定义模板标记。在视图中执行此操作将如下所示:
class CategoryList(ListView):
model = Category
template_name = 'categories.html'
def get_queryset(self):
qs = super(CategoryList, self).get_queryset()
for category in qs:
category.some_filtered_products = category.product_set.filter(...)
return qs
这将在视图中解析查询集,并将过滤后的产品放入每个Category
实例的新内存中属性中。