This is a pre-production deployment of Warehouse, however changes made here WILL affect the production instance of PyPI.
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Project Description

Travis


django-layers makes it possible to serve a set of templates and static resources as defined in settings.py. This means you can serve different HTML, Javascript and CSS to eg. basic mobile devices, smart phones and desktop browsers. These template sets (aka layers) also stack, so if you create foo.html for basic devices it is automatically available for desktop browsers as well. You can override foo.html for desktop browsers.

Installation

  1. Install or add django-layers to your Python path.
  2. Add layers after django.contrib.static to your INSTALLED_APPS setting.
  3. Ensure the app that you will be creating layers for appears first in INSTALLED_APPS else template override won’t work.

Example

Note: there is a working example in the example subdirectory.

We have sites example.com, basic.example.com and smart.example.com. Each of the sites have their own settings.py, thus different Django processes.

Directory structure

templates
    - basic
        - foo.html (1)
        - bar.html (2)
    - smart
        - bar.html (3)
    - web
        - bar.html (4)

static
    - basic
        - foo.css (5)
        - bar.css (6)
    - smart
        - bar.css (7)
    - web
        - bar.css (8)

Settings

We define an “inheritance” hierarchy.

  • Desktop settings has LAYERS = {'layers': ['basic', 'web']}.
  • Basic settings has LAYERS = {'layers': ['basic']}.
  • Smart settings has LAYERS = {'layers': ['basic', 'smart']}.

All settings require loaders and finders to be set. The order is important.

INSTALLED_APPS = (
    'myapp',
    'layers',
    ...
)

TEMPLATE_LOADERS = (
    'layers.loaders.filesystem.Loader',
    'django.template.loaders.filesystem.Loader',
    'layers.loaders.app_directories.Loader',
    'django.template.loaders.app_directories.Loader',
)

STATICFILES_FINDERS = (
    'layers.finders.FileSystemFinder',
    'django.contrib.staticfiles.finders.FileSystemFinder',
    'layers.finders.AppDirectoriesFinder',
    'django.contrib.staticfiles.finders.AppDirectoriesFinder',
)

Overriding templates from other apps

The normal template resolution rules apply. Creating eg. templates/web/registration/login.html will override the login page for web only.

Collectstatic

Collectstatic remains unaffected. The collector delegates to finders, so all layer aware resources end up with partial paths under the STATIC_ROOT directory.

Decorators

A user could follow a link that leads him to a layer that serves a broken page. For example a web site is served on www.site.com with an accompanying basic site m.site.com. Visiting www.site.com/flashy-dashboard with a basic device like a Samsung E250 will result in the user being redirected to m.site.com/flashy-dashboard That page probably does not exist for basic devices because it can’t render it well enough. In such a case a decorator exclude_from_layers is provided that renders a friendly page instead of a 404 or 500 error:

class WebOnlyView(TemplateView):
    template_name = "layers/web_only_view.html"

    @exclude_from_layers(layers=("basic",))
    def get(self, *args, **kwargs):
        return super(WebOnlyView, self).get(*args, **kwargs)

Authors

  • Hedley Roos

Changelog

0.2

  1. Inevitable package rename.

0.1

  1. Initial release.
Release History

Release History

1.9

This version

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0.5.1

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0.5

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0.4

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0.3

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0.2

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0.1

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Download Files

Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
django_layers_hr-1.9-py2.7.egg (37.0 kB) Copy SHA256 Checksum SHA256 2.7 Egg Nov 1, 2016
django-layers-hr-1.9.tar.gz (15.4 kB) Copy SHA256 Checksum SHA256 Source Nov 1, 2016

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