django-content-gallery

django-content-gallery is a Django application that allows to attach a collection of images to objects of any models in you Django projects. It also allows you easily add and remove images, re-attach images to another object (i.e. move an image to another collection) and change an order of images in the collection as well.

The django-content-gallery creates 5 images with different sizes for each uploaded image:

• a large image viewed in the gallery for users with high-resulution displays
• a small image viewed in the gallery for users with low-resulution displays
• a large preview image used in a preview
• a small preview image used in a small preview
• a thumbnail viewed in the list of available images

Requirements

• Python 3.4+
• Django 1.10+
• Pillow 3.0.0+
• python-magic 0.4.2+
• awesome-slugify 1.6+
• django-admin-jqueryui112 1.12.1+

Note

Windows users should also copy magic1.dll, regex2.dll and zlib1.dll onto the PATH. These libraries are required by the python-magic package and could be downloaded on the File for Windows official page.

Installation

To install the django-content-gallery type following command:

$ pip install django-content-gallery

Then in settings.py:

• Add the content_gallery to INSTALLED_APPS in the settings of your project and the admin_jqueryui to enable sorting images in the admin panel.
• Add the django.template.context_processors.media context processor to the the context_processor list under the OPTIONS dict in TEMPLATES
• Add the path to MEDIA_ROOT and MEDIA_URL

INSTALLED_APPS = [
    ...
    'content_gallery',
    'admin_jqueryui',
]

TEMPLATES = [
    {
        ...
        'OPTIONS': {
            'context_processors': [
                ...
                'django.template.context_processors.media',
                 ],
        },
    },
]

MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
MEDIA_URL = '/media/'

Add the content_gallery.urls to the urls.py of your project (you could use any URL pattern, not only ^content_gallery\), and add the handling of MEDIA_ROOT when working locally/in debug mode:

urlpatterns = [
    ...
    url(r'^content_gallery/', include('content_gallery.urls')),
]

if settings.DEBUG:
    urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

Create tables in the database using the migrate command:

$ python manage.py migrate content_gallery

Now the django-content-gallery is ready for use!

Configuration

To change settings of the django-content-gallery set the CONTENT_GALLERY dict in your settings.py module. The dict could contain following items:

• image_width - the target width of the large image
• image_height - the target height of the large image
• small_image_width - the target width of the small image
• small_image_height - the target height of the small image
• thumbnail_width - the target width of the thumbnail
• thumbnail_height - the target height of the thumbnail
• preview_width - the target width of the large preview
• preview_height - the target height of the large preview
• small_preview_width - the target width of the small preview
• small_preview_height - the target height of the small preview
• path - the subdirectory in the MEDIA_ROOT where image files would be stored

Default values of these settings are

• image_width = 752
• image_height = 608
• small_image_width = 564
• small_image_height = 456
• thumbnail_width = 94
• thumbnail_height = 76
• preview_width = 376
• preview_height = 304
• small_preview_width = 141
• small_preview_height =114
• path = 'content_gallery'

You could change some of these settings and keep the rest undefined in you settings.py, in this case the default values would be used instead:

CONTENT_GALLERY = {
        "image_width": 1024,
        "image_height": 768,
}

This code changes size of the large image only, the rest of settings values would be default.

Usage

To make your models able to attach a gallery, use the ContentGalleryMixin in models you want to use the content-gallery with:

from django.db import models
from content_gallery.models import ContentGalleryMixin

class YourModel(ContentGalleryMixin, models.Model):
    ...

Also to be able to edit attached image collection on the admin page of your model, you need to add the ImageAdminInline to inlines of your model admin. Add following code to your admin.py

from django.contrib import admin
from content_gallery.admin import ImageAdminInline
from . import models

class YourModelAdmin(admin.ModelAdmin):
    inlines = [
        ImageAdminInline,
    ]

admin.site.register(models.YourModel, YourModelAdmin)

Now the django-content-gallery is available for your models. Then you need to add the content-gallery to your pages.

First of all add the content_gallery/_image_view.html template to your templates where you want the content-gallery to be available:

{% include "content_gallery/_image_view.html" %}

The django-content-gallery uses jQuery within its scripts, so make sure that jQuery is available on your pages where the content-gallery is used.

To add the gallery related to your objects onto your pages the django-content-gallery provides two template tags. Those template tags are located in the content_gallery template tag set, so before use them you should load this set:

{% load content_gallery %}

The first template tag named gallery_preview adds the large preview. It uses one argument which is your object. This tag is meant to be used generally in templates of detail views:

{% gallery_preview your_object %}

This code adds the preview widget that shows a preview of the first image related to the object.

The gallery_small_preview tag adds a small preview onto the page, it uses such object as an argument as well, and is meant to be used generally in templates of list views:

{% gallery_small_preview your_object %}

This code adds the small preview widget that shows a small preview of the first image related to the object.

Also the django-content-gallery provides a simple template tag named gallery_image_data that also gets an object as an argument and returns a dict object that contains an object of the first image and JSON data for constructing a link to the object. You could use this template tag to construct you own custom widgets.

For simply accessing all images data associated with an object from within a template, you can generate a queryset like this:

{% for image in myobject.content_gallery.all %}
  <img src="{{ image.thumbnail_url }}">
{% endfor %}

For more details, see the content_gallery_testapp which is an example of the django-content-gallery usage.