utils-plus

A simple reusable Django app with various mixins and utility functions.

Installation

install the package using the below command

pip install django-utils-plus

or install the development version using

pip install git://github.com/jnoortheen/django-utils-plus.git@master#egg=django-utils-plus

Utils

Management Commands

• clear_records
• create_admin
• test_mail
• cleardata
• create_middleware

Template tags

1. klass
2. unpkg
3. jsdelivr (combined support as well)

serve static files using npm

it is convenient to keep track of all external js libraries in project using a package.json. It is used to keep latest version of available packages. The following template tags can be used to serve these packages right from CDN on production and node_modules during development

unpkg

Alternative to standard static template tag. When you are using external static files/libraries like bootstrap, jquery you may want to load them from CDNs instead of managing them yourself in production. This tag helps you to do that. When settings.DEBUG is false, this will return paths that resolved from package.json to versioned unpkg.com. Otherwise it will resolve to node_modules locally.

jsdelivr

like `unpkg` adds support for using https://www.jsdelivr.com/

Usage:

load the template tags and use unpkg like static tag,

{% load static utils_plus_tags %}
<link rel="stylesheet" type="text/css" href="{% unpkg 'bootstrap/dist/css/bootstrap.min.css' %}"/>
<script src="{% unpkg 'bootstrap/dist/js/bootstrap.min.js' %}"></script>
<script src="{% unpkg 'jquery/dist/jquery.min.js' %}"></script>

Note:

1. the package.json should be present in the project ROOT DIR.
2. When DEBUG is True the packages must be installed and should be available already inside node_modules.

Middleware

• login_required_middleware

Urls & Routing with ease

An elegant and DRY way to define urlpatterns. It has easier to nest many levels deeper and still have the readability. It is just a wrapper behind the standard url(), include() methods.

This is how your urls.py may look

### urls.py ###
urlpatterns = [
    url(r'^studenteditordocument/(?P<doc_pk>\d+)/edit/$', EditView.as_view(), name='edit-student-doc'),
    url(r'^studenteditordocument/(?P<doc_pk>\d+)/export/$', ExportView.as_view(), name='export-editore-doc'),

    url(r'^docs/$', Docs.as_view(), name='student-documents'),
    url(r'^publish/$', PulishOrDelete.as_view(), {'action': 'publish'}, name="publish_document"),
    url(r'^delete/$', PulishOrDelete.as_view(), name='delete_document'),
]

after using Url

### urls.py ###

from utils_plus.router import Url

with Url('editor') as u:
    with u.int('doc_pk'):
        u('edit', EditView.as_view(), 'edit-doc')
        u('export', ExportView.as_view(), 'export-doc')
u('docs', Docs.as_view(), 'student-documents')
u('publish', PulishOrDelete.as_view(), 'publish_document', action='publish')
u('delete', PulishOrDelete.as_view(), 'delete_document')

urlpatterns = u.urlpatterns

you could also do this if you aren't afraid of typing more. There is no need to define the urlpatterns variable separately

### urls.py ###

from utils_plus.router import Url

with Url('editor') as urlpatterns:
    with urlpatterns.int('doc_pk'):
        urlpatterns('edit', EditView.as_view(), 'edit-doc')
        urlpatterns('export', ExportView.as_view(), 'export-doc')
urlpatterns('docs', Docs.as_view(), 'student-documents')
urlpatterns('publish', PulishOrDelete.as_view(), 'publish_document', action='publish')
urlpatterns('delete', PulishOrDelete.as_view(), 'delete_document')

see tests/test_router.py for more use cases

Model

1. CheckDeletableModelMixin adds a is_deletable method which then can be used to check any affected related records before actually deleting them. originally it is copied from this gist

2. ChoicesEnum Enumerator class for use with the django ORM choices field

3. QueryManager A DRYer way to set select_related, prefetch_related & filters to queryset.

   • this has first_or_create method similar to get_or_create

from django.db import models
from utils_plus.models import QueryManager

class Post(models.Model):
    author = models.ForeignKey('Author')
    comments = models.ManyToManyField('Comment')
    published = models.BooleanField()
    pub_date = models.DateField()
    
    # custom managers
    objects = QueryManager() # equivalent to models.Manager
    public_posts = QueryManager(published=True).order_by('-pub_date')
    rel_objects = QueryManager().selects('author').prefetches('comments')

Config Option

1. URL_GROUP_TRAIL_SLASH
   • By default all the urls generated by this class will have trailing slash
   • Set this to False in settings.py to change this behaviour

Views

1. CreateUpdateView:
   • combines CreateView and UpdateView

Testing the project

- clone the repo and run migrations after installing dependencies
- `inv test` will run all the test for the app