Другое¶

Отправка email сообщений¶

from django.core.mail import send_mail

send_mail(
    'Django mail',
    'This e-mail was sent with Django.',
    'your_account@gmail.com',
    ['your_account@gmail.com'],
    fail_silently=False)

redis¶

redis-server - старт сервера redis-cli - консольное управление

pip install redis

# добавляем ключ в хранилище
127.0.0.1:6379> SET name "ilnurgi"
OK

# получаем значение ключа
127.0.0.1:6379> GET name
"ilnurgi"

# проверяем существование ключа
127.0.0.1:6379> EXISTS name
(integer) 1

# ключ удалится из хранилища через 2 секунды
127.0.0.1:6379> EXPIRE name 2
(integer) 1
127.0.0.1:6379> GET name
(nil)

127.0.0.1:6379> SET total 1
OK
127.0.0.1:6379> DEL total
(integer) 1
127.0.0.1:6379> GET total
(nil)

# views.py

import redis

r = redis.StrictRedis(host='localhost', port=6379, db=0)
r.set('foo', 'bar')
value = r.get('foo')

# увеличит значение на 1,
# если ключа нет то создаст со значением 0 и вернет увеличенное значение
value2 = r.incr('some_key')

# возвращает ключи словаря
# 0 - минимальное значение ключа
# -1 - максимальное значение,
# desc - обратная сортировка
value2 = r.zrange('some_key', 0, -1, desc=True)[:10]

celery¶

pip install celery
apt-get install rabbitmq

# pip install flower
# celery -A myshop flower
# celery -A myshop worker -l info

# celery.py

import os

from celery import Celery

from django.conf import settings

app = Celery('myshop')
app.config_from_object('django.conf:settings')
app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)

# tasks.py

from celery import task
from django.core.mail import send_mail

@task
def send_mail_task(some_arg):
    # ...
    return send_mail(subject, message, admin_email, [some_email])

# views.py

def some_view(request):

    # ...
    send_mail_task.delay(some_arg)
    # ...

django-paypal¶

pip install django-paypal

# settings.py

INSTALLED_APPS = (
    # ...
    'paypal.standard.ipn',
)

PAYPAL_RECEIVER_EMAIL = 'mypaypalemail@myshop.com'
PAYPAL_TEST = True

# urls.py

url(r'^paypal/', include('paypal.standard.ipn.urls')),

# views.py

from decimal import Decimal

from django.conf import settings
from django.core.urlresolvers import reverse
from django.shortcuts import render, get_object_or_404

from paypal.standard.forms import PayPalPaymentsForm

from orders.models import Order

def payment_process(request):
    order_id = request.session.get('order_id')
    order = get_object_or_404(Order, id=order_id)
    host = request.get_host()

    paypal_dict = {
        'business': settings.PAYPAL_RECEIVER_EMAIL,
        'amount': (
            '%.2f' % order.get_total_cost().quantize(Decimal('.01'))),
        'item_name': 'Order {}'.format(order.id),
        'invoice': str(order.id),
        'currency_code': 'USD',
        'notify_url': 'http://{}{}'.format(host, reverse('paypal-ipn')),
        'return_url': 'http://{}{}'.format(host, reverse('payment:done')),
        'cancel_return': (
            'http://{}{}'.format(host, reverse('payment:canceled'))),
    }
    form = PayPalPaymentsForm(initial=paypal_dict)
    return render(
        request,
        'payment/process.html',
        {'order': order, 'form':form},
    )

# signals.py

from django.shortcuts import get_object_or_404

from paypal.standard.models import ST_PP_COMPLETED
from paypal.standard.ipn.signals import valid_ipn_received

from orders.models import Order

def payment_notification(sender, **kwargs):
    ipn_obj = sender
    if ipn_obj.payment_status == ST_PP_COMPLETED:
        # payment was successful
        order = get_object_or_404(Order, id=ipn_obj.invoice)
        # mark the order as paid
        order.paid = True
        order.save()

valid_ipn_received.connect(payment_notification)

translations¶

from django.utils.translation import gettext as _
from django.utils.translation import gettext_lazy, ngettext, ngettext_lazy

output = _('Text to be translated.')
output = gettext_lazy('Text to be translated.')

output = ngettext(
    'there is %(count)d product',
    'there are %(count)d products',
    count) % {'count': count}

test¶

# ускоряем тесты
import sys

TESTING = 'test' in sys.argv

if TESTING:
    PASSWORD_HASHERS = [
        'django.contrib.auth.hashers.MD5PasswordHasher',
    ]