if I have a variable in the context of unknown length, for example;list=[{'key':'A'},{'key':'B'},{'key':'C'}]
如果我有一个变量在未知长度的上下文中;列表=[{“关键”:“A”},{“关键”:“B”},{“关键”:' C ' })
How can I get the last object? {{ list.0.key }}
works for the first, but {{ list.-1.key }}
gives;Could not parse the remainder: '-1.key' from 'list.-1.key'
如何得到最后一个对象?{ { list.0。键}用于第一个,但{list. 1}。关键} }走样;不能解析余数:'-1。主要从“value - 1. -键”
6 个解决方案
#1
51
Thanks everyone for you help, it lead me to the realisation that I can use the with tag.
谢谢大家的帮助,这让我意识到我可以使用with标签。
{% with list|last as last %}
{{ last.key }}
{% endwith %}
#2
24
Use the last
template tag:
使用最后的模板标签:
{{ value|last }}
If value is the list
['a', 'b', 'c', 'd']
, the output will be the string"d"
.如果值是列表['a', 'b', 'c', 'd'],输出将是字符串"d"。
#3
6
In my case I find this solution: {{object_list.last.id}}
very useful on expression like this: {% url 'my-url' object_list.first.id object_list.last.id %}
在我的例子中,我找到了这个解决方案:{object_list.last。id}对于这样的表达式非常有用:{% url' my-url' object_list.first。id object_list.last。id % }
#5
0
without with, will be:
没有,将会:
{% set last = list|last %}
{{ last.key }}
#6
-3
Use this piece of code in your template:
在模板中使用这段代码:
{{ list|slice:":-1".items.0.0 }}
#1
51
Thanks everyone for you help, it lead me to the realisation that I can use the with tag.
谢谢大家的帮助,这让我意识到我可以使用with标签。
{% with list|last as last %}
{{ last.key }}
{% endwith %}
#2
24
Use the last
template tag:
使用最后的模板标签:
{{ value|last }}
If value is the list
['a', 'b', 'c', 'd']
, the output will be the string"d"
.如果值是列表['a', 'b', 'c', 'd'],输出将是字符串"d"。
#3
6
In my case I find this solution: {{object_list.last.id}}
very useful on expression like this: {% url 'my-url' object_list.first.id object_list.last.id %}
在我的例子中,我找到了这个解决方案:{object_list.last。id}对于这样的表达式非常有用:{% url' my-url' object_list.first。id object_list.last。id % }
#4
#5
0
without with, will be:
没有,将会:
{% set last = list|last %}
{{ last.key }}
#6
-3
Use this piece of code in your template:
在模板中使用这段代码:
{{ list|slice:":-1".items.0.0 }}