How To Let Not All The Data Show Up Using A Choice Field But Only The Ones Related To The Choice Field In Django?

I have this website which has one purpose which is viewing data out of a database according to the related topic chosen by the user. I have managed to make the data show up, but all the data found in the database is showing up when I click on the viewing button paying no attention to the chosen topic. I am not sure if it is because of how I have organized the database or if the problem is with my forms.

This is the model that I am using:

    from django.db import models
    from home.choices import *

    # Create your models here.

    class Topic(models.Model):
        topic_name = models.IntegerField(
                        choices = question_topic_name_choices, default = 1)
        topic_question = models.ForeignKey('Question',
                                        on_delete=models.CASCADE,
                                        blank=True,
                                        null=True)
        topic_answer = models.ForeignKey('Answer',
                                        on_delete=models.CASCADE,
                                        blank=True,
                                        null=True)
        def __str__(self):
            return '%s' % self.topic_name

    class Image (models.Model):
        image_file = models.ImageField()

        def __str__(self):
            return '%s' % self.image_file

    class Question(models.Model):
        question_description = models.TextField()
        question_answer = models.ForeignKey(    'Answer',
                                        on_delete=models.CASCADE,
                                        blank=True,
                                        null=True)
        question_image = models.ForeignKey(    'Image',
                                        on_delete=models.CASCADE,
                                        blank=True,
                                        null=True)

        def __str__(self):
            return '%s' % self.question_description

    class Answer(models.Model):
        answer_description = models.TextField()
        answer_image = models.ForeignKey(    'Image',
                                        on_delete=models.CASCADE,
                                        blank=True,
                                        null=True)
        def __str__(self):
            return '%s' % self.answer_description

This is the views file:

    from django.shortcuts import render, render_to_response, redirect
    from .choices import *
    from django.views.generic import TemplateView
    from home.models import Topic, Image, Question, Answer
    from home.forms import TopicForm


    class QuizView(TemplateView):
        template_name = "index.html"

        def get(self, request):
            form = TopicForm()
            args = {"form": form}
            return render(request, self.template_name, args)

        def post(self, request):
            form = TopicForm(request.POST)
            if  form.is_valid():
                form = TopicForm()
            posts = Question.objects.all()
            args = {"form": form, "posts": posts}
            return render(request, self.template_name, args)

This is the forms file:

    from django import forms
    from betterforms.multiform import MultiModelForm
    from .models import Topic, Image, Question, Answer
    from .choices import question_topic_name_choices

    class TopicForm(forms.ModelForm):

        class Meta:
            model = Topic
            fields = ['topic_name',]

    # 'class': 'home-select-one'

By the way how can I add this class into the ChoiceField?

This is the html file:

        {% extends 'base.html' %}
          {% block content %}
          <h4>International Baccalaureate Physics</h4>
                <form  method="POST">
                  {% csrf_token %}
                  {{ form.as_p }}
                  <button type="submit" id="home-Physics-time-button">It is Physics Time</button>
                </form>
                {% for post in posts %}
                <table style="margin: 10px auto; width: 90%; line-height: 35px;">
                  <tbody>
                    <tr>
                      <td style = "border: 2px solid #ffffff; padding: 1%;"> <strong>Question:</strong> <br>{{ post.topic_question}}</td>
                    </tr>
                    <tr>
                      <td style = "border: 2px solid #ffffff; padding: 1%;"> <strong>Answer:</strong> <br>{{ post.topic_answer }}</td>
                    </tr>
                  </tbody>
                </table>
                {% endfor %}

            {% endblock content %}

Thank you in advance!

In your view.py, you want to apply the selection made in the TopicForm correct? So something in this direction is needed. You'll need to double check what the cleaned_data of the TopicForm has exactly.

from django.shortcuts import render, render_to_response, redirect
from .choices import *
from django.views.generic import TemplateView
from home.models import Topic, Image, Question, Answer
from home.forms import TopicForm


class QuizView(TemplateView):
    template_name = "index.html"

    def get(self, request):
        form = TopicForm()
        args = {"form": form}
        return render(request, self.template_name, args)

    def post(self, request):
        form = TopicForm(request.POST)
        posts = Question.objects.all()
        if form.is_valid():
            # Apply the selected topic as filter on all the posts.
            # TODO: Figure out what the exact value is you get from the form.
            posts = posts.filter(question_topic__topic_name=form.cleaned_data['topic_name'])
        args = {"form": form, "posts": posts}
        return render(request, self.template_name, args)