updated_and_withdraw.py

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# To Do: How can we refactor code to make that faster? 
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def func(user, moderator_ids):
	for post in Post.objects.all().order('?'):
		if user.pk in moderator_ids:
			post.updated_at = timezone.now()
			post.save()

#
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# To Do: What problems can we encounter with? How can you impove the code?
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def withdraw(user_id, amount):
	balance = UserBalance.objects.get(user_id=user_id)
	balance.amount -= amount
	balance.save()
	send_request_to_paypal(balance.paypal_id, amount)

#
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# To Do: 
# 1. Write a code of model `Webinar`, that contains the fields:
# - title
# - is_published
# - starts_at
# 
# 2. Please, write a code of the function `get_nearest_webinar`. The function returns a published webinar that starts in the near future.
# 3. Write a code of the function `count_published_webinars`. That returns a number of published webinars.
# 4. How you could change the code if the count of published webinars is displayed on the really visited page?
#
# P.S.: If you need use additional classes you are welcome.
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def get_nearest_webinar():
	pass

def count_published_webinars():
	pass

#
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# Please, add the processing of probably exceptions and logging:
######################################################
#
@login_required()
def disable_subscription(request):
    account = Account.objects.get(user=request.user)
   
    if request.method == 'POST':
        if 'do_disable' in request.POST:
            account.switch_to_free()
            return HttpResponseRedirect(reverse('app:my_account'))

    return render(request, 'theme/disable_subscription.html')

#
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# There is a really visited site. Many uWSGI workers. What problem will you probably encounter?
# What changes may you suggest?
######################################################
#

def increment_views(webinar_id):
	# ...
	w = Webinar.objects.get(pk=webinar_id)
	w.views_count += 1
	w.save()
	#...
#
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