Django General Notes.txt

# have pip for python3 installed
sudo apt-get install python3-pip
sudo pip3 install --upgrade pip

# install pipenv
pip install --user pipenv

# prepare folder
pipenv --three

# install django
pipenv install Django

# check if django is installed
pipenv run python -m django --version

# create a new project
pipenv run django-admin startproject mysite

# run applicaito
pipenv run python mysite/manage.py runserver

# migrate database
python3 manage.py migrate

# create django admin user
python3 manage.py createsuperuser

# create a new app in django project
python3 manage.py startapp polls

# add app in top level settings.py
INSTALLED_APPS = [
	'polls.apps.PollsConfig',
]

# make migrations for app
python3 manage.py makemigrations polls

# peek database migrations
python3 manage.py sqlmigrate polls 0001

# create a sample view
def index(request):
    return HttpResponse("Hello, world. You're at the polls index.")

# create urls file (urls.py)
urlpatterns = [
    path('', views.index),
]

# add top level url to project
path('polls/', include('polls.urls'))

# define models
class Question(models.Model):
    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')


class Choice(models.Model):
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)

# make model modifiable in admin
# admin.py
admin.site.register(Question)

# create tostring effect
class Question(models.Model):
    # ...
    def __str__(self):
        return self.question_text

# create a new instance of question
q = Question(question_text="What's new?", pub_date=timezone.now())
q.save()
q.id

# get all objects
Question.objects.all()

# delete object
c.delete()