jinja 中从 str 到 int 的类型转换

Question

I encountered a scenario where I need to fetch numeric data from the database and run that number of loops on my template, something like:

in my views.py :

from django.template.defaulttags import register

@register.filter
def get_range(value):
    return range(value)

def quesSetting(request):
    questionSet_obj = questionSet.objects.filter(id = pk).first()
    quesSetting_dict = {
        'noNumeric' : questionSet_obj.noNumeric,
    }
    return render(request, 'app/quesSetting.html', quesSetting_dict)

my template :

{% for i in noNumeric|get_range %}
  <input type="text" class="form-control" name="numericQuestion" array_column="{{ i }}">
{% endfor %}

Now it says following error :

'str' object cannot be interpreted as an integer

So, I try to typecast the noNumeric into int like this:

{% for i in int(noNumeric)|get_range %}
  <input type="text" class="form-control" name="numericQuestion" array_column="{{ i }}">
{% endfor %}

This time it gives following error:

Could not parse some characters: int|(noNumeric)||get_range

How can I fix this issues?

Answer 1

I just found a solution, like:

@register.filter
def get_range(value):
    value = int(value)
    return range(value)