easydevmixin/add_attachment.html

## add_attachment.html
<!DOCTYPE html>
{% load i18n staticfiles %}
<html>
<!-- file: add_attachment.html -->
    <head lang="en">
        <meta charset="UTF-8">
        <title>{% block title %}{% endblock %}</title>
    </head>
    <body>
        <form action="" method="post" enctype="multipart/form-data">
            {% csrf_token %}
            <p>
                <label for="id_parent_id">Parent ID:</label>
                <input id="id_parent_id" type="text" maxlength="18" name="parent_id">
            </p>
            <input type="file" name="myfiles" multiple>
            <button type="submit">{% trans "Save" %}</button>
        </form>
    </body>
</html>

## models.py
# models.py
import random
import string
import os

from django.db import models
from django.utils.timezone import now as timezone_now


def create_random_string(length=30):
    if length <= 0:
        length = 30

    symbols = string.ascii_lowercase + string.ascii_uppercase + string.digits
    return ''.join([random.choice(symbols) for x in range(length)])


def upload_to(instance, filename):
    now = timezone_now()
    filename_base, filename_ext = os.path.splitext(filename)
    return 'my_uploads/{}_{}{}'.format(
        now.strftime("%Y/%m/%d/%Y%m%d%H%M%S"),
        create_random_string(),
        filename_ext.lower()
    )


class Attachment(models.Model):
    parent_id = models.CharField(max_length=18)
    file_name = models.CharField(max_length=100)
    attachment = models.FileField(upload_to=upload_to)

## views.py
# views.py
# -*- coding: utf-8 -*-
from django.shortcuts import redirect, render
from django.shortcuts import render_to_response

from .models import Attachment


def add_attachment(request):
    if request.method == "POST":
        parent_id = request.POST['parent_id']
        files = request.FILES.getlist('myfiles')
        for a_file in files:
            instance = Attachment(
                parent_id=parent_id,
                file_name=a_file.name,
                attachment=a_file
            )
            instance.save()

        return redirect("add_attachment_done")

    return render(request, "add_attachment.html")


def add_attachment_done(request):
    return render_to_response('add_attachment_done.html')
	<!DOCTYPE html>
	{% load i18n staticfiles %}
	<html>
	<!-- file: add_attachment.html -->
	<head lang="en">
	<meta charset="UTF-8">
	<title>{% block title %}{% endblock %}</title>
	</head>
	<body>
	<form action="" method="post" enctype="multipart/form-data">
	{% csrf_token %}
	<p>
	<label for="id_parent_id">Parent ID:</label>
	<input id="id_parent_id" type="text" maxlength="18" name="parent_id">
	</p>
	<input type="file" name="myfiles" multiple>
	<button type="submit">{% trans "Save" %}</button>
	</form>
	</body>
	</html>
	# models.py
	import random
	import string
	import os

	from django.db import models
	from django.utils.timezone import now as timezone_now


	def create_random_string(length=30):
	if length <= 0:
	length = 30

	symbols = string.ascii_lowercase + string.ascii_uppercase + string.digits
	return ''.join([random.choice(symbols) for x in range(length)])


	def upload_to(instance, filename):
	now = timezone_now()
	filename_base, filename_ext = os.path.splitext(filename)
	return 'my_uploads/{}_{}{}'.format(
	now.strftime("%Y/%m/%d/%Y%m%d%H%M%S"),
	create_random_string(),
	filename_ext.lower()
	)


	class Attachment(models.Model):
	parent_id = models.CharField(max_length=18)
	file_name = models.CharField(max_length=100)
	attachment = models.FileField(upload_to=upload_to)
	# views.py
	# -- coding: utf-8 --
	from django.shortcuts import redirect, render
	from django.shortcuts import render_to_response

	from .models import Attachment


	def add_attachment(request):
	if request.method == "POST":
	parent_id = request.POST['parent_id']
	files = request.FILES.getlist('myfiles')
	for a_file in files:
	instance = Attachment(
	parent_id=parent_id,
	file_name=a_file.name,
	attachment=a_file
	)
	instance.save()

	return redirect("add_attachment_done")

	return render(request, "add_attachment.html")


	def add_attachment_done(request):
	return render_to_response('add_attachment_done.html')