Use variable as dictionary key in Django template

Question

I'd like to use a variable as an key in a dictionary in a Django template. I can't for the life of me figure out how to do it. If I have a product with a name or ID field, and ratings dictionary with indices of the product IDs, I'd like to be able to say:

{% for product in product_list %}
     <h1>{{ ratings.product.id }}</h1>
{% endfor %}

In python this would be accomplished with a simple

ratings[product.id]

But I can't make it work in the templates. I've tried using with... no dice. Ideas?

Answer 1

Create a template tag like this (in yourproject/templatetags):

@register.filter
def keyvalue(dict, key):    
    return dict[key]

Usage:

{{dictionary|keyvalue:key_variable}}