CODEWITHSUNDEEP
djangodjango-urls
Pierre de LESPINAY
Pierre de LESPINAY

Reputation: 46178

URL template optional param

Let's consider this template part

<form class="form-horizontal" action="{% if client_id %}
    {% url client_edit client_id=client_id %}{% else %}
    {% url client_edit %}
    {% endif %}" method="post">{% csrf_token %}
{{ client_form }}
</form>

As you can see the parameter client_id is optional.

Is there a way to avoid this repetition (url client_edit) ?

Url pattern:

url('^client/edit$', client_edit, name='client_edit'),
url('^client/edit/(?P<client_id>\d+)$', client_edit, name='client_edit'),

Upvotes: 2

Views: 278

Answers (2)

Burhan Khalid
Burhan Khalid

Reputation: 174622

urls don't have optional parameters. You can have multiple patterns point to the same view (as you have done), and then check for the defaults in the view. In your template, {% url client_edit client_id=client_id|default_if_none:-1 %}, then depending on what you want to happen on the view end filter appropriately:

def client_edit(request, client_id = None):
    if client_id:
        client = get_object_or_404(Client, pk=client_id)
    else:
        # Default value for client
        client = Client.objects.filter(active=True) # for example 
    # your normal logic here

Upvotes: 1

DimmuR
DimmuR

Reputation: 291

It's not repetition of using 

{% url client_edit %}

since you actualy define two urls. If you really want to make it shorter (not necessary simplier) you could create some filter like

{{client_id|make_url}}

and inside filter you can resolve to proper url

Upvotes: 1

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