Why is the function from the button called without being pressed?

Question

Django

I want to make a button for deleting an object, I made such a button in the template

<button onclick="{% delete_post '{{i.pk}}' %}">Delete post</button>

In tags such a function

@register.simple_tag()
def delete_post(pk):
    try:
        post = Post.objects.get(pk=pk)
        post.delete()
    except:
        pass

But for some reason, the function is not called when the button is clicked, but simply when the page is loaded.

Answer 1

Because you need to read the documentation first, and then write the code.

Answer 2

The tags are executed when the page is rendered. They are not made for this.
For such functionality, you need to make a view, register it in urls.py, specifying the name. And then specify this name through {%
url 'url name' i.pk %}.
And yes, javascript is called in onclick. Or make not a button, but a link that will call the view. Or write javascript that calls the view if you want to do it without reloading the page.