How to define optional query parameters in Django?

Question

here i got one endpoint to receive multiple query parameters namely first_name, last_name. location and i need the endpoint to be able to handle following scenarios

all the 3 param's
1 param
2 param's

And i found this but still i got 404 when provide one query parameter, only works when all the parameters are given.

urls.py

re_path(r'^project_config/(?P<product>\w+|)/(?P<project_id>\w+|)/(?P<project_name>\w+|)/$',
            views.results, name='config')

And view

    def results(request, product, project_id, project_name):
        response = "You're looking at the results of question %s."
        print(product)
        print(project_name)
        return HttpResponse(response % project_id)

How can allow url to accept optional query parameters ?

Would it not be better to use a GET parameter instead of putting them inside the url? — Abdul Aziz Barkat
– Abdul Aziz Barkat, Commented Mar 10, 2021 at 11:10
If the number of parameters is dynamic, then it is often better to work with a querystring instead. — willeM_ Van Onsem
– willeM_ Van Onsem, Commented Mar 10, 2021 at 11:23
parameters are not completely dynamic, it's a combination of three — pl-jay
– pl-jay, Commented Mar 10, 2021 at 11:27

rahul.m · Accepted Answer · 2021-03-10 11:30:14Z

1

As mentioned in the comments using query-parameter try this

URL

re_path(r'^project_config/',views.results, name='config')

# http://127.0.0.1:8000/project_config/?product=1&project_id=2&project_name=foo

Views

def results(request):
    
    queryprms = request.GET
    product = queryprms.get('product')
    project_id = queryprms.get('project_id')
    project_name = queryprms.get('project_name')
    
    response = "You're looking at the results of question %s."
    
    # set your combination
    if product and project_id and project_name:
        # do some thing
    if product and project_id:
        # do some thing
    
    # so on

    return HttpResponse(response % project_id)

answered Mar 10, 2021 at 11:30

rahul.m

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