Question

How do I place an HTML link what refers to the current page, and which adds additional GET parameters (or overwriting existing ones, if they already exist)?

Right now I have something like:

 <a href="{{ request.path }}?Key=Value"> My Link </a>

Currently, request is passed to the page. If request.path is https://stackoverflow.com/, then the resulting link becomes https://stackoverflow.com/?Key=Value

The problem?

But of course, if the current URL is https://stackoverflow.com/?PrevKey=PrevValue then it becomes:

https://stackoverflow.com/?PrevKey=PrevValue?Key=Value

Notice the incorrect second question mark — it should in fact be:

https://stackoverflow.com/?PrevKey=PrevValue&Key=Value

Furthermore, if there is already a key with the same name, then instead of overwriting it, my current solution ignores it — which is wrong.

How do I solve these two problems?

Answer 1

You’ll need a custom tag. There are a couple on djangosnippets – this one looks pretty comprehensive.