django/shop/site_shop/templates/add.html

{% extends "base.html" %}

{% block content %}
    {% if user.is_authenticated %}

    <h3>Добавление товара</h3>
    <form method="post" action="{% url 'add' %}" enctype="multipart/form-data">
        {% csrf_token %}
        {{ form.as_p }}
        <button type="submit">Добавить товар</button>
    </form>
    {% endif %}

{% endblock %}