pythondjangotemplatesdictionary

Django template how to look up a dictionary value with a variable

mydict = {"key1":"value1", "key2":"value2"}

The regular way to lookup a dictionary value in a Django template is {{ mydict.key1 }}, {{ mydict.key2 }}. What if the key is a loop variable? ie:

{% for item in list %} # where item has an attribute NAME
  {{ mydict.item.NAME }} # I want to look up mydict[item.NAME]
{% endfor %}

mydict.item.NAME fails. How to fix this?

Solution

  • Write a custom template filter:

    from django.template.defaulttags import register
...
@register.filter
def get_item(dictionary, key):
    return dictionary.get(key)

    (I use .get so that if the key is absent, it returns none. If you do dictionary[key] it will raise a KeyError then.)

    usage:

    {{ mydict|get_item:item.NAME }}