django-attachments

django-attachments is a generic set of template tags to attach any kind of files to models.

Installation:

Put attachments to your INSTALLED_APPS in your settings.py within your django project.
Add (r'^attachments/', include('attachments.urls')), to your urls.py.

Add 'django.core.context_processors.request' to your TEMPLATE_CONTEXT_PROCESSORS in your settings.py. If this setting does not exist, simply add the following snippet at the end of your settings.py:

TEMPLATE_CONTEXT_PROCESSORS = (
    'django.core.context_processors.auth',
    'django.core.context_processors.i18n',
    'django.core.context_processors.media',
    'django.core.context_processors.request',
    'django.contrib.messages.context_processors.messages',
)

Don't forget to resync your database:
```
./manage.py syncdb
```
Grant the user some permissons:
- For adding attachments grant the user (or group) the permission attachments.add_attachments.
- For deleting attachments grant the user (or group) the permission attachments.delete_attachments. This allows the user to delete only attachments which are assigned to him (rather the attachments he uploaded self).
- For deleting foreign attachments (attachments by other users) grant the user the permission attachments.delete_foreign_attachments.
This only works for the templatetags, the admin still allows anybody to add or delete attachments.

Mind that you serve files!

django-attachments stores the files in your site_media directory and does not modify them. For example, if an user uploads a .html file your webserver will probably display it in HTML. It's a good idea to serve such files as plain text. In a Apache2 configuration this would look like:

<Location /site_media/attachments>
    AddType text/plain .html .htm .shtml .php .php5 .php4 .pl .cgi
</Location>

Usage:

In contrib.admin:

django-attachments provides a inline object to add a list of attachments to any kind of model in your admin app.

Simply add AttachmentInlines to the admin options of your model. Example:

from django.contrib import admin
from attachments.admin import AttachmentInlines

class MyEntryOptions(admin.ModelAdmin):
    inlines = [AttachmentInlines]

In your frontend templates:

First of all, load the attachments_tags in every template you want to use it:

{% load attachments_tags %}

django-attachments comes with some templatetags to add or delete attachments for your model objects in your frontend.

get_attachments_for [object]: Fetches the attachments for the given model instance. You can optionally define a variable name in which the attachment list is stored in the template context. The default context variable name is attachments Example:
```
{% get_attachments_for entry as "attachments_list" %}
```
attachment_form: Renders a upload form to add attachments for the given model instance. Example:
```
{% attachment_form [object] %}
```
It returns an empty string if the current user is not logged in.
attachment_delete_link: Renders a link to the delete view for the given attachment. Example:
```
{% for att in attachments_list %}
    {{ att }} {% attachment_delete_link att %}
{% endfor %}
```
This tag automatically checks for permission. It returns only a html link if the give n attachment's creator is the current logged in user or the user has the delete_foreign_attachments permission.

Quick Example:

{% load attachments_tags %}
{% get_attachments_for entry as "my_entry_attachments" %}

{% if my_entry_attachments %}
<ul>
{% for attachment in my_entry_attachments %}
    <li>
        <a href="{{ attachment.attachment_file.url }}">{{ attachment.filename }}</a>
        {% attachment_delete_link attachment %}
    </li>
{% endfor %}
</ul>
{% endif %}

{% attachment_form entry %}

{% if messages %}
<ul class="messages">
{% for message in messages %}
    <li{% if message.tags %} class="{{ message.tags }}"{% endif %}>
        {{ message }}
    </li>
{% endfor %}
</ul>
{% endif %}

In the console:

First, import the items you will need:

import os
from django.core.files import File
from attachments.models import Attachment
from myproject.models import Person

Next, retrieve the object you wish to attach to:

me = Person.objects.get(name='aaron')

Now open the attachment you want from your drive using the django File object:

mypicture = File(open('/home/aaron/mypicture.jpg', 'r'))

Finally, create the Attachment object and save it, and close the file handle:

a = Attachment()
a.creator = me
a.attachment_file = mypicture
a.save()
mypicture.close()

Changelog:

v0.3.1 (2009-07-29):

Added a note to the README that you should secure your static files.

v0.3 (2009-07-22):

This version adds more granular control about user permissons. You need to explicitly add permissions to users who should been able to upload, delete or delete foreign attachments.

This might be backwards incompatible as you did not need to assign add/delete permissions before!

skada/django-attachments