django-bananas 1.5.3

Compatibility

Currently tested only for

• Django 1.11-2.2 under Python 3.5-3.7

• Django 3.0 under Python 3.6-3.7

pull requests welcome!

Models

from bananas.models import TimeStampedModel

class Book(TimeStampedModel):
    pass

>>> book.date_created
>>> book.date_modified

from bananas.models import UUIDModel

class User(UUIDModel):
    display_name = models.CharField(max_length=255)
    email = models.EmailField()

>>> user.id
UUID('70cf1f46-2c79-4fc9-8cc8-523d67484182')

>>> user.pk
UUID('70cf1f46-2c79-4fc9-8cc8-523d67484182')

from bananas.models import SecretField

class User(models.Model):
    # Ask for 32 bytes and require 24 bytes from urandom
    token = SecretField(num_bytes=32, min_bytes=24)

>>> User.objects.create()  # Token is generated automatically
>>> user.token
'3076f884da827809e80ced236e8da20fa36d0c27dd036bdd4afbac34807e5cf1'

from bananas.models import URLSecretField


class User(models.Model):
    # Generates an URL-safe base64 representation of the random value
    token = URLSecretField(num_bytes=32, min_bytes=24)

>>> user.token
'WOgrNwqFKOF_LsHorJy_hGpPepjvVH7Uar-4Z_K6DzU-'

ORM

New queryset.dicts() with field renaming through kwargs, and dot-dict style results:

from bananas.query import ExtendedQuerySet

class Book(TimeStampedModel):
    author = ForeignKey(Author)
    objects = Manager.from_queryset(ExtendedQuerySet)()

>>> book = Book.objects.dicts('id', author='author__name').first()
{'id': 1, 'author': 'Jonas'}
>>> book.author
'Jonas'

Admin

Custom django admin stylesheet.

# settings.py
INSTALLED_APPS = (
    'bananas',  # Needs to be before 'django.contrib.admin'
    'django.contrib.admin',
    ...
)

ADMIN = {
    'SITE_HEADER': 'Bananas',
    'SITE_TITLE': 'Bananas Admin',
    'INDEX_TITLE': 'Admin Panel',
    # 'BACKGROUND_COLOR': '#363c3f',
}

# your main urls.py
from bananas import admin

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

# app/admin.py or something
from django.conf.urls import url
from bananas import admin

@admin.register
class MyAdminView(admin.AdminView):
    def get_urls(self):
        return [
            url(r'^custom/$',
                self.admin_view(self.custom_view)),
                # ^^ Note that the view is wrapped in self.admin_view.
                # Needed for permissions and to prevent any
                # threading issues.
        ]

    def get(self, request):
        return self.render('admin/template.html', {})

    def custom_view(self, request):
        return self.render('admin/custom.html', {})

Admin API

Django admin API for use with django-bananas.js (react admin site)

# app/admin.py or something
from bananas.admin.api.mixins import BananasAPI
from bananas.admin.api.schemas import schema
from bananas.admin.api.views import BananasAdminAPI
from bananas.lazy import lazy_title
from django.utils.translation import gettext_lazy as _
from rest_framework import viewsets

class CustomAdminAPI(BananasAdminAPI):

    name = lazy_title(_("custom"))

    @schema(query_serializer=SomeSerializer, responses={200: SomeSerializer})
    def list(self, request):
        return ...

class SomeModelAdminAPI(BananasAPI, viewsets.ModelViewSet)

    serializer_class = SomeModelSerializer

    def list(self, request):
        return ...

# app/urls.py or something
from bananas.admin import api
from django.conf.urls import include, path

from .admin import CustomAdminAPI, SomeModelAdminAPI

api.register(CustomAdminAPI)
api.register(SomeModelAdminAPI)

urlpatterns = [
    path(r"^api/", include("bananas.admin.api.urls"))
]

# setting.py
ADMIN = {
   'API': {
      # Optional: override the default OpenAPI schemes
      'SCHEMES': ['https'],
   }
}

Database URLs

Parse database information from a URL, kind of like SQLAlchemy.

bananas.environment - Helpers to get setting values from environment variables

bananas.environment.env is a wrapper around os.environ, it provides the standard .get(key, value), method to get a value for a key, or a default if the key is not set - by default that default is None as you would expect. What is more useful is the additional type-parsing .get_* methods it provides:

• get_bool

• get_int

• get_list, get_set, get_tuple

get_int:

>>> # env ONE=1
>>> env.get_int('ONE')
1
>>> env.get_int('TWO')  # Not set
None
>>> env.get_int('TWO', -1)  # Not set, default to -1
-1

get_bool:

returns True if the environment variable value is any of, case-insensitive:

• "true"

• "yes"

• "on"

• "1"

returns False if the environment variable value is any of, case-insensitive:

• "false"

• "no"

• "off"

• "0"

if the value is set to anything other than above, the default value will be returned instead.

e.g.:

>>> # env CAN_DO=1 NO_THANKS=false NO_HABLA=f4lse
>>> env.get_bool('CAN_DO')
True
>>> env.get_bool('NO_THANKS')
False
>>> env.get_bool('NO_HABLA')  # Set, but not valid
None
>>> env.get_bool('NO_HABLA', True)  # Set, but not valid, with default
True
>>> env.get_bool('IS_NONE')  # Not set
None
>>> env.get_bool('IS_NONE', False)  # Not set, default provided
False

get_tuple, get_list, get_set:

Returns a tuple, list or set of the environment variable string, split by the ascii comma character. e.g.:

>>> # env FOOS=foo,foo,bar
>>> get_list('FOO')
['foo', 'foo', 'bar']
>>> get_set('FOO')
set(['foo', 'bar'])

bananas.secrets - Helpers for getting secrets from files

Is useful for getting the content of secrets stored in files. One usecase is docker secrets.

BANANAS_SECRETS_DIR can be used to configure the directory that secrets live in. Defaults to /run/secrets/.

>>> from bananas import secrets

>>> secrets.get_secret("hemlis")
"topsecret"