Django HTML QuerySet

Question

Is there a way to check if the student exsist in the database class table, since student is assigned as a forgeinkey in the table. I want to achive this without open another loop. index.html:

<ul>
{% for student in studentList %}
    {% if student in classList %}
        <li><a href="#">{{ student.name }}</a></li>
    {% endif %}
{% endfor %}

views.py

def index(request):
context = {
    'studentList': Student.objects.all(),
    'classList': ClassRoom.objects.all(),
}
return render(request, 'resurs/index.html', context)

I added bit more information, student is assigned as a forgeinkey to a classroom in the database. — user9527415
– user9527415, Commented Apr 2, 2018 at 11:15

Daniel Roseman · Accepted Answer · 2018-04-02 11:14:58Z

2

Your question is not clear. You don't have "another loop".

However this is the wrong way to do this - it is terribly inefficient. Instead, loop through the students in each class. Assuming Student has a ForeignKey to Class:

{% for class in classList %}
    {% for student in class.student_set.all %}
        ...

answered Apr 2, 2018 at 11:14

Daniel Roseman

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1 Comment

user9527415 Over a year ago

Thanks, i see now what you mean

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