form not submitted to database django

I am trying to submit data using model popup form using django

forms.py

from django import forms  from .models import CollegeMaster  from bootstrap_modal_forms.mixins import PopRequestMixin, CreateUpdateAjaxMixin    class AddClgForm(PopRequestMixin, CreateUpdateAjaxMixin, forms.ModelForm):      class Meta:          model = CollegeMaster          fields = ['college_name', 'college_initials', 'logo']

models.py

from django.db import models  from django.urls import reverse    class CollegeMaster(models.Model):      college_name = models.CharField(max_length = 250,unique=True)      college_initials = models.CharField(max_length=100,unique=True)      logo = models.FileField()        def get_absolute_url(self):          return reverse('college_master:index')        def __str__(self):          return self.college_initials

This is my view class for creating college details.

views.py

class CollegeCreateView(PassRequestMixin, SuccessMessageMixin,generic.CreateView):      template_name = 'college_master/create_college.html'      form_class = AddClgForm      success_message = 'Success: Book was created.'      success_url = reverse_lazy('college_master:index')

index.html

{% extends 'base.html' %}  {% block title %}College Master{% endblock %}  {% block body %}  {% include "college_master/_modal.html" %}  <div class="container-fluid">    <!-- Breadcrumbs-->    <ol class="breadcrumb">      <li class="breadcrumb-item"><a href="{% url 'home' %}">Dashboard</a></li>      <li class="breadcrumb-item active">College Master</li>    </ol>    <!-- Form Content Start-->    <div class="col-12 mb-3">      <button class="create-college btn btn-primary" type="button" name="button">        <span class="fa fa-plus mr-2"></span>Create College</button>    </div>    <!-- Form Content End -->  </div>  {% endblock %}    {% block extrascripts %}    <script type="text/javascript">      $(function () {        // Create book button        $(".create-college").modalForm({formURL: "{% url 'college_master:create_college' %}"});          });    </script>  {% endblock extrascripts %}

This is main html file where form content is placed and when user submit on click data is not reflected to database.

create_college.html

{% load widget_tweaks %}    <form method="POST" action="{% url 'college_master:index' %}" enctype="multipart/form-data">    {% csrf_token %}      <div class="modal-header">      <h3 class="modal-title">Create College</h3>      <button type="button" class="close" data-dismiss="modal" aria-label="Close">        <span aria-hidden="true">&times;</span>      </button>    </div>      <div class="modal-body">        <div class="{% if form.non_field_errors %}invalid{% endif %} mb-2">        {% for error in form.non_field_errors %}          {{ error }}        {% endfor %}      </div>        {% for field in form %}        <div class="form-group">          <label for="{{ field.id_for_label }}">{{ field.label }}</label>          {% render_field field class="form-control" placeholder=field.label %}          <div class="{% if field.errors %} invalid{% endif %}">            {% for error in field.errors %}              <p class="help-block">{{ error }}</p>            {% endfor %}          </div>        </div>      {% endfor %}    </div>      <div class="modal-footer">      <button type="submit" class="submit-btn btn btn-primary">Create</button>    </div>    </form>

This is popup container

_modal.html

<div class="modal fade" tabindex="-1" role="dialog" id="modal">    <div class="modal-dialog" role="document">      <div class="modal-content"></div>    </div>  </div>

Problem is when I click on submit button data does not stored in database and return blank form showing 'field is required'.

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