How do I hyperlink an item returned from a queryset automatically

I have a model

class Transaction(models.Model):
    sender = models.ForeignKey(MyBankAccount, unique=False, related_name="transactions_sent") 
    receiver = models.ForeignKey(RecipientBankAccount, unique=False, related_name="transactions_received")
    created = models.DateField('transfer request date')
    amount = models.FloatField()
    createdby=models.ForeignKey(User,null=True)

which I display using

<li>{{ item.sender }} {{ item.receiver }} {{ item.amount 开发者_StackOverflow社区}}</li>

I d like item.sender to be automatically hyperlinked to

http://example.com/johnsmith/trans/ where johnsmith is the name of the user that creates the transaction (aka createdby). I already implemented the view of this url. I just need to link to it.

So, presumably your url.py looks something like:

urlpatterns = patterns(
    '',
    # Patterns:

    url(r'^(?P<username>[\w-]+)/(?P<createdby>[\w-]+)/$', transaction, name="transaction"),
    ....

Your view is:

 def transaction(request, username, createdby):
     ...

Then your template fragment is:

 <a href="{% url transaction item.sender item.receiver %}">{{ item.sender }}</a>

Or you could define the following in your Transaction class (the urls.py file must remain):

 def get_absolute_url(self):
     from django.core.urlresolvers import reverse
     return reverse('transaction', kwargs={'username': self.sender, 'createdby': self.receiver})

And then your template would look like:

 <a href="{{ item.get_absolute_url }}">{{ item.sender }}</a>

But geez, this is all Django 101.