Django Templates and variable attributes

By : Yon
Source: Stackoverflow.com
Question!

I'm using Google App Engine and Django templates.
I have a table that I want to display the objects look something like:

Object Result:
    Items = [item1,item2]
    Users = [{name='username',item1=3,item2=4},..]

The Django template is:

<table>
<tr align="center">
    <th>user</th>
    {% for item in result.items %}
        <th>{{item}}</th>
    {% endfor %}
</tr>

{% for user in result.users %}
    <tr align="center"> 
        <td>{{user.name}}</td>
        {% for item in result.items %}
            <td>{{ user.item }}</td>
        {% endfor %}
    </tr>
{% endfor %}
</table>

Now the Django documention states that when it sees a . in variables
It tries several things to get the data, one of which is dictionary lookup which is exactly what I want but doesn't seem to happen...

By : Yon


Answers

shouldn't this:

{{ user.item }}

be this?

{{ item }}

there is no user object in the context within that loop....?

By : Nic Wise


Or you can use the default django system which is used to resolve attributes in tempaltes like this :

from django.template import Variable, VariableDoesNotExist
@register.filter
def hash(object, attr):
    pseudo_context = { 'object' : object }
    try:
        value = Variable('object.%s' % attr).resolve(pseudo_context)
    except VariableDoesNotExist:
        value = None
return value

That just works

in your template :

{{ user|hash:item }}
By : Martyn


As a replacement for k,v in user.items on Google App Engine using django templates where user = {'a':1, 'b', 2, 'c', 3}

{% for pair in user.items %}
   {% for keyval in pair %} {{ keyval }}{% endfor %}<br>
{% endfor %}

a 1
b 2
c 3

pair = (key, value) for each dictionary item.

By : hollerith


This video can help you solving your question :)
By: admin