About Django Formsets and File Uploads

If you have a form and formsets where the formsets have file uploads, you must set enctype="multipart/form-data" to the main form for the uploads to work. Here's how to set it with django-crispy-forms:

from django import forms
from crispy_forms.helper import FormHelper

class MainForm(forms.Form):
    # ...
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        self.helper = FormHelper()
        self.helper.form_method = "POST"
        self.helper.attrs = {
            "enctype": "multipart/form-data",
        }
        # ...