I'm following along

The expected result was this:

How can I fix this?

CodePudding user response：

The variable using {{ }} cannot be used inside {% %}Built-in tag[Django-doc] but we can use the variable inside {% %} if it is already available in the template. So we have to get the value before and we can set that value using with[Django-doc]. But the value you are getting is dynamic with every loop you get new value with {{forloop.counter}} and the same thing we cannot use {{ }} inside {% %}.So you can concatenate the values differently i.e. {{forloop.counter}} and choice. For concatenate we can use add Built-in filter[Django-doc] as documented

Adds the argument to the value. This filter will first try to coerce both values to integers. If this fails, it’ll attempt to add the values together anyway. This will work on some data types (strings, list, etc.) and fail on others.

But the problem with add is as Warned as

Strings that can be coerced to integers will be summed, not concatenated,

So we have to convert the {{forloop.counter}} to string first before concatenation and we can use stringformat[Django-doc] for that and store the value and use that value as

{% for choice in question.choice_set.all %}
    {% with counter=forloop.counter|stringformat:"s" %} 
    {% with choice_id="choice"|add:counter %}
    <input type="radio" name="choice" id={{choice_id}} value="{{ choice.id }}">
    <label for={{choice_id}}>{{ choice.choice_text }}</label><br>
    {% endwith %}
    {% endwith %}
{% endfor %}