Django#

Project#

Creating a project#

$ django-admin startproject mysites

Creating an app#

$ python manage.py startapp polls

Running Development server#

$ python manage.py runserver

Models#

Creating Models#

from django.db import 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)

Migrations#

$ python manage.py makemigrations polls
$ python manage.py migrate

Fields#

Documentation: https://docs.djangoproject.com/en/4.1/ref/models/fields/

Integer	`models.IntegerField()`
Float	`models.FloatField()`
Char	`models.CharField(max_length=None)`
Text	`models.TextField()`
File	`models.FileField(upload_to='uploads/')`
Email	`models.EmailField()`
Foreign Key	`models.ForeignKey({model_name}, on_delete=models.CASCADE)`

Views#

Creating a View#

# views.py
from django.views.generic import ListView
from polls.models import Question

class QuestionListView(ListView):
    model = Question

# urls.py
from django.urls import path
from polls.views import QuestionListView

urlpatterns = [
    path('questions/', QuestionListView.as_view()),
]

Class-based Views#

Inspector: https://ccbv.co.uk

Generic	`View`	`django.views`
Template	`TemplateView`	`django.views.generic`
List	`ListView`	`django.views.generic`
Detail	`DetailView`	`django.views.generic`
Form	`FormView`	`django.views.generic.edit`
Create	`CreateView`	`django.views.generic.edit`
Delete	`DeleteView`	`django.views.generic.edit`
Update	`UpdateView`	`django.views.generic.edit`

Administration#

Creating an admin user#

$ python manage.py createsuperuser

Creating a View#

from django.contrib import admin
from .models import Question

admin.site.register(Question)