Question

in my Django 1.1.1 application I’ve got a function in the view that returns to his template a range of numbers and a list of lists of items, for example:

...  
data=[[item1 , item2, item3], [item4, item5, item6], [item7, item8, item9]]  
return render_to_response('page.html', {'data':data, 'cycle':range(0,len(data)-1])

Inside the template I’ve got an external for loop, that contains also another for cycle to display in output the contains of the inner lists of data in this way

...  
{% for page in cycle %}   
...   
< table >   
{% for item in data.forloop.counter0 %}  
< tr >< td >{{item.a}} < /td > < td > {{item.b}} ... < /td > < /tr >  
...  
< /table >  
{% endfor %}  
{% if not forloop.last %}  
< div class="page_break_div" >  
{% endif %}  
{% endfor %}  
... 

But Django template engine doesn’t work with the forloop.counter0 value as index for the list (instead it does if I manually put a numeric value as index). Is there a way to let the list loop works with the external forloop.counter0 value?
Thanks in advance for the help 🙂

Answer 1

You can’t use variables for attribute names, dictionary keys or list indices.

Also range(0,len(data)-1] is not valid python. It should be range(len(data)).

You probably don’t need cycle. Maybe what you want is this:

{% for itemlist in data %}
    ...
    <table>
        {% for item in itemlist %}
        <tr>
          <td>{{ item.a }}</td>
          <td>{{ item.b }} ... </td>
        </tr>
        ...
        {% endfor %}
    </table>
    {% if not forloop.last %}
        <div class="page_break_div">
    {% endif %}
{% endfor %}