CSRF验证失败。更新表单时请求中止

I have the following template

我有以下模板

{% block content %}
    <form enctype="multipart/form-data" action="" method="post">{% csrf_token %}
    {% for field in form %}
        {{ field.label_tag }} {{ field }}
    {% endfor %}
    <input type="submit" value="Submit">
    </form>
{% endblock %}
{% blo