Category: Python

To send email via Python Django, we can use the EmailMesage class.

For instance, we write

EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_USE_TLS = True
EMAIL_HOST = 'smtp.gmail.com'
EMAIL_HOST_USER = 'youremail@gmail.com'
EMAIL_HOST_PASSWORD = 'email_password'
EMAIL_PORT = 587

to add our email settings in settings.py.

Then we write

from django.core.mail import EmailMessage

email = EmailMessage('Subject', 'Body', to=['your@email.com'])
email.send()

to create an EmailMessage object with the subject, body and to emails.

And then we call send to send the email.

To return redirect() with parameters with Python Django, we can call redirect.

For instance, given that we have

url(r'element/update/(?P<pk>\d+)/$', 'element.views.element_update', name='element_update'),

in urls.py, we write

from django.shortcuts import redirect
from .models import Element


def element_info(request):
    # ...
    element = Element.object.get(pk=1)
    return redirect('element_update', pk=element.id)

def element_update(request, pk)
    # ...

in views.py to redirect to the view with name element_update in the element_info view.

The pk argument is value of the pk URL parameter.

To redirect user to his custom page after login with Python Django, we can use the HttpResponseRedirect class.

For instance, we write

from django.http import HttpResponseRedirect
from django.urls import reverse
from django.contrib.auth.decorators import login_required

@login_required
def home(request):
    return HttpResponseRedirect(
               reverse(NAME_OF_PROFILE_VIEW, 
                       args=[request.user.username]))

to create the HttpResponseRedirect object with the path of the view that we get from

reverse(NAME_OF_PROFILE_VIEW, args=[request.user.username])

The args argument has the URL parameters.

To get model from string with Python Django, we can use the get_model function.

For instance, we write

from django.apps import apps

model = apps.get_model('app_name', 'model_name')

to call apps.get_model with the app name and model name as arguments to get the model.

To retrieve a Foreign Key value with Python django-rest-framework serializers, we add the foreign key field into our serialize and put the field in the tuple list in the Meta class.

For instance, we write

class ItemSerializer(serializers.ModelSerializer):
    category_name = serializers.CharField(source='category.name')

    class Meta:
        model = Item
        fields = ('id', 'name', 'category_name')

to add the ItemSerializer that has the category_name field set to a CharField that has source set to the category.name column.

And then in the Meta class, we have fields set to a tuple with the category_name` field in it to return it.