New Django {% querystring %} template tag. Django 5.1 came out last week and includes a neat new template tag which solves a problem I've faced a bunch of times in the past.
{% querystring color="red" size="S" %}
Adds ?color=red&size=S
to the current URL - keeping any other existing parameters and replacing the current value for color
or size
if it's already set.
{% querystring color=None %}
Removes the ?color=
parameter if it is currently set.
If the value passed is a list it will append ?color=red&color=blue
for as many items as exist in the list.
You can access values in variables and you can also assign the result to a new template variable rather than outputting it directly to the page:
{% querystring page=page.next_page_number as next_page %}
Other things that caught my eye in Django 5.1:
- PostgreSQL connection pools.
- The new LoginRequiredMiddleware for making every page in an application require login.
- The SQLite database backend now accepts init_command for settings things like
PRAGMA cache_size=2000
on new connections. - SQLite can also be passed
"transaction_mode": "IMMEDIATE"
to configure the behaviour of transactions.
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