Render returned string in django template

I have been working a lot with Django's template language lately, and it works well in most cases, but recently I've come across a small problem it hasn't been able to solve.
I'm iterating over a bunch of database objects, and building a button in the template from each of them. Something like this:

{% for item in items %}
    <button id="{{ item.action.id }}">
        {{ item.action.text }}
    </button>
{% endfor %}

This works fine, but my Action class is inheritable, and may have a different button structure. Say I wanted to sometimes have a javascript function attached as well. My first though was well, let's just create a render method in my class, and then call that in my template.

class ScriptAction(Action):
    def render(self):
        return '''
            <button id="{}" onclick={}>
                {}
            </button>'''.format(self.id, self.func, self.text)

Because no the template is much more elegant, and doesn't rely on a fixed button structure:

{% for item in items %}
    {{ item.action.render|safe }}
{% endfor %}

And now for my actual problem: what if this rendered string needs further processing by django?
Maybe render method returns a string like

<button id="action-button-id" onclick="console.log('clicked')">
    {{ item.name }}
</button>

Currently, {{ item.name }} will not be rendered in the template loop. Is there a way of getting around this?

Perhaps I making this more complicated than it should be, but I've looked through the Django built-in tags and filters, even looked at writing you own parser. But at this point something inside me told me that I was being obsessive. This is actually just a small problem, and would require a fair amount of time, so -

• is this more effort than it is worth?
• is writing complex parsers like this secure?
• is the Django template language even able to do something like this?

If you could hone in on some of these points, I would really appreciate it. This problem is really bugging me.
Thanks in advance!