我将字典my_var
的字典定义为:
defaultdict(<class 'collections.Counter'>,{
'product1': Counter({'total_qty': 1}),
'product2': Counter({'total_qty': 13}),
'product3': Counter({'total_qty': 65})
})
我将其传递给模板:
context = {'my_var': my_var}
return render(request, 'my_template.html', context)
在模板中,我尝试在没有运气的情况下进行打印:
<ul>
{% for k in my_var %}
<li>{{ k.component }}: {{ k.total_qty }}</li>
{% endfor %}
</ul>
我没有错误,但是没有键和值。我究竟做错了什么?
我得到类似的东西:
:
:
:
编辑:
为了增加一些上下文,我最初有一个字典列表:
used_components = [{'total_qty': 5, 'component': 'component blue'},...]
然后我使用此功能按键对字典进行分组和求和:
def solve(dataset, group_by_key, sum_value_keys):
dic = defaultdict(Counter)
for item in dataset:
key = item[group_by_key]
vals = {k: item[k] for k in sum_value_keys}
dic[key].update(vals)
return dic
my_var = solve(used_components, 'component', ['total_qty'])
然后我尝试如上所述在模板中打印
my_var
。编辑2:
这是我的实际views.py:
def solve(dataset, group_by_key, sum_value_keys):
dic = defaultdict(Counter)
for item in dataset:
key = item[group_by_key]
vals = {k: item[k] for k in sum_value_keys}
dic[key].update(vals)
return dic
def components_by_season(request, season_name):
season = get_object_or_404(Season, name=season_name)
orderitems = OrderItem.objects.filter(order__season__name=season_name)
# variant_ids = OrderItem.objects.filter(order__season__name=season_name).values_list('variant_id', flat=True)
# components = Component.objects.filter(bom__variant__id__in=variant_ids)
used_components = []
for item in orderitems:
variant_ordered_qty = item.qty
components = Component.objects.filter(boms__variant__id__exact=item.variant.id)
for component in components:
bom_qty = component.boms.get(component=component).qty
total_qty = bom_qty * variant_ordered_qty
used_components.append({
'component': component.name.encode('ascii', 'ignore'),
'total_qty': total_qty
})
out = solve(used_components, 'component', ['total_qty'])
# counter = Counter(used_components)
context = {'season': season, 'orderitems': orderitems, 'used_components': used_components, 'out': out}
return render(request, 'components_by_season.html', context)
最佳答案
假设这实际上是您的真实代码,my_var
是字典,而不是列表。遍历一个字典只会给你键。如果还需要这些值,则应遍历.items()
。所以:
<ul>
{% for k, v in my_var.items %}
<li>{{ k }}: {{ v.total_qty }}</li>
{% endfor %}
</ul>
另请注意,没有
product
键。产品名称只是外部字典中的关键。
关于django - Django-在模板中打印字典,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43030196/