django-utils-plus 0.6

# utils-plus
A simple reusable Django app with various mixins and utility functions.

# Installation
install the package using the below command

```commandline
pip install django-utils-plus
```

or install the development version using
```commandline
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
- klass
- unpkg

### 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.
##### 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.
1. 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
```python
### 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`
```python
### 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
```python
### 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](https://gist.github.com/freewayz/69d1b8bcb3c225bea57bd70ee1e765f8)

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

```python
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

## Testing

- clone the repo and run migrations
- `fab test` will run all the test for the app