django/tests/admin_views/models.py

1155 lines
28 KiB
Python

import datetime
import tempfile
import uuid
from django.contrib import admin
from django.contrib.auth.models import User
from django.contrib.contenttypes.fields import GenericForeignKey, GenericRelation
from django.contrib.contenttypes.models import ContentType
from django.core.exceptions import ValidationError
from django.core.files.storage import FileSystemStorage
from django.db import models
from django.utils import timezone
class Section(models.Model):
"""
A simple section that links to articles, to test linking to related items
in admin views.
"""
name = models.CharField(max_length=100)
def __str__(self):
return self.name
@property
def name_property(self):
"""
A property that simply returns the name. Used to test #24461
"""
return self.name
class Article(models.Model):
"""
A simple article to test admin views. Test backwards compatibility.
"""
title = models.CharField(max_length=100)
content = models.TextField()
date = models.DateTimeField()
section = models.ForeignKey(Section, models.CASCADE, null=True, blank=True)
another_section = models.ForeignKey(
Section, models.CASCADE, null=True, blank=True, related_name="+"
)
sub_section = models.ForeignKey(
Section, models.SET_NULL, null=True, blank=True, related_name="+"
)
def __str__(self):
return self.title
@admin.display(ordering="date", description="")
def model_year(self):
return self.date.year
@admin.display(ordering="-date", description="")
def model_year_reversed(self):
return self.date.year
@property
@admin.display(ordering="date")
def model_property_year(self):
return self.date.year
@property
def model_month(self):
return self.date.month
@property
@admin.display(description="Is from past?", boolean=True)
def model_property_is_from_past(self):
return self.date < timezone.now()
class Book(models.Model):
"""
A simple book that has chapters.
"""
name = models.CharField(max_length=100, verbose_name="¿Name?")
def __str__(self):
return self.name
class Promo(models.Model):
name = models.CharField(max_length=100, verbose_name="¿Name?")
book = models.ForeignKey(Book, models.CASCADE)
author = models.ForeignKey(User, models.SET_NULL, blank=True, null=True)
def __str__(self):
return self.name
class Chapter(models.Model):
title = models.CharField(max_length=100, verbose_name="¿Title?")
content = models.TextField()
book = models.ForeignKey(Book, models.CASCADE)
class Meta:
# Use a utf-8 bytestring to ensure it works (see #11710)
verbose_name = "¿Chapter?"
def __str__(self):
return self.title
class ChapterXtra1(models.Model):
chap = models.OneToOneField(Chapter, models.CASCADE, verbose_name="¿Chap?")
xtra = models.CharField(max_length=100, verbose_name="¿Xtra?")
guest_author = models.ForeignKey(User, models.SET_NULL, blank=True, null=True)
def __str__(self):
return "¿Xtra1: %s" % self.xtra
class ChapterXtra2(models.Model):
chap = models.OneToOneField(Chapter, models.CASCADE, verbose_name="¿Chap?")
xtra = models.CharField(max_length=100, verbose_name="¿Xtra?")
def __str__(self):
return "¿Xtra2: %s" % self.xtra
class RowLevelChangePermissionModel(models.Model):
name = models.CharField(max_length=100, blank=True)
class CustomArticle(models.Model):
content = models.TextField()
date = models.DateTimeField()
class ModelWithStringPrimaryKey(models.Model):
string_pk = models.CharField(max_length=255, primary_key=True)
def __str__(self):
return self.string_pk
def get_absolute_url(self):
return "/dummy/%s/" % self.string_pk
class Color(models.Model):
value = models.CharField(max_length=10)
warm = models.BooleanField(default=False)
def __str__(self):
return self.value
# we replicate Color to register with another ModelAdmin
class Color2(Color):
class Meta:
proxy = True
class Thing(models.Model):
title = models.CharField(max_length=20)
color = models.ForeignKey(Color, models.CASCADE, limit_choices_to={"warm": True})
pub_date = models.DateField(blank=True, null=True)
def __str__(self):
return self.title
class Actor(models.Model):
name = models.CharField(max_length=50)
age = models.IntegerField()
title = models.CharField(max_length=50, null=True, blank=True)
def __str__(self):
return self.name
class Inquisition(models.Model):
expected = models.BooleanField(default=False)
leader = models.ForeignKey(Actor, models.CASCADE)
country = models.CharField(max_length=20)
def __str__(self):
return "by %s from %s" % (self.leader, self.country)
class Sketch(models.Model):
title = models.CharField(max_length=100)
inquisition = models.ForeignKey(
Inquisition,
models.CASCADE,
limit_choices_to={
"leader__name": "Palin",
"leader__age": 27,
"expected": False,
},
)
defendant0 = models.ForeignKey(
Actor,
models.CASCADE,
limit_choices_to={"title__isnull": False},
related_name="as_defendant0",
)
defendant1 = models.ForeignKey(
Actor,
models.CASCADE,
limit_choices_to={"title__isnull": True},
related_name="as_defendant1",
)
def __str__(self):
return self.title
def today_callable_dict():
return {"last_action__gte": datetime.datetime.today()}
def today_callable_q():
return models.Q(last_action__gte=datetime.datetime.today())
class Character(models.Model):
username = models.CharField(max_length=100)
last_action = models.DateTimeField()
def __str__(self):
return self.username
class StumpJoke(models.Model):
variation = models.CharField(max_length=100)
most_recently_fooled = models.ForeignKey(
Character,
models.CASCADE,
limit_choices_to=today_callable_dict,
related_name="+",
)
has_fooled_today = models.ManyToManyField(
Character, limit_choices_to=today_callable_q, related_name="+"
)
def __str__(self):
return self.variation
class Fabric(models.Model):
NG_CHOICES = (
(
"Textured",
(
("x", "Horizontal"),
("y", "Vertical"),
),
),
("plain", "Smooth"),
)
surface = models.CharField(max_length=20, choices=NG_CHOICES)
class Person(models.Model):
GENDER_CHOICES = (
(1, "Male"),
(2, "Female"),
)
name = models.CharField(max_length=100)
gender = models.IntegerField(choices=GENDER_CHOICES)
age = models.IntegerField(default=21)
alive = models.BooleanField(default=True)
def __str__(self):
return self.name
class Persona(models.Model):
"""
A simple persona associated with accounts, to test inlining of related
accounts which inherit from a common accounts class.
"""
name = models.CharField(blank=False, max_length=80)
def __str__(self):
return self.name
class Account(models.Model):
"""
A simple, generic account encapsulating the information shared by all
types of accounts.
"""
username = models.CharField(blank=False, max_length=80)
persona = models.ForeignKey(Persona, models.CASCADE, related_name="accounts")
servicename = "generic service"
def __str__(self):
return "%s: %s" % (self.servicename, self.username)
class FooAccount(Account):
"""A service-specific account of type Foo."""
servicename = "foo"
class BarAccount(Account):
"""A service-specific account of type Bar."""
servicename = "bar"
class Subscriber(models.Model):
name = models.CharField(blank=False, max_length=80)
email = models.EmailField(blank=False, max_length=175)
def __str__(self):
return "%s (%s)" % (self.name, self.email)
class ExternalSubscriber(Subscriber):
pass
class OldSubscriber(Subscriber):
pass
class Media(models.Model):
name = models.CharField(max_length=60)
class Podcast(Media):
release_date = models.DateField()
class Meta:
ordering = ("release_date",) # overridden in PodcastAdmin
class Vodcast(Media):
media = models.OneToOneField(
Media, models.CASCADE, primary_key=True, parent_link=True
)
released = models.BooleanField(default=False)
class Parent(models.Model):
name = models.CharField(max_length=128)
def clean(self):
if self.name == "_invalid":
raise ValidationError("invalid")
class Child(models.Model):
parent = models.ForeignKey(Parent, models.CASCADE, editable=False)
name = models.CharField(max_length=30, blank=True)
def clean(self):
if self.name == "_invalid":
raise ValidationError("invalid")
class PKChild(models.Model):
"""
Used to check autocomplete to_field resolution when ForeignKey is PK.
"""
parent = models.ForeignKey(Parent, models.CASCADE, primary_key=True)
name = models.CharField(max_length=128)
class Meta:
ordering = ["parent"]
def __str__(self):
return self.name
class Toy(models.Model):
child = models.ForeignKey(PKChild, models.CASCADE)
class EmptyModel(models.Model):
def __str__(self):
return "Primary key = %s" % self.id
temp_storage = FileSystemStorage(tempfile.mkdtemp())
class Gallery(models.Model):
name = models.CharField(max_length=100)
class Picture(models.Model):
name = models.CharField(max_length=100)
image = models.FileField(storage=temp_storage, upload_to="test_upload")
gallery = models.ForeignKey(Gallery, models.CASCADE, related_name="pictures")
class Language(models.Model):
iso = models.CharField(max_length=5, primary_key=True)
name = models.CharField(max_length=50)
english_name = models.CharField(max_length=50)
shortlist = models.BooleanField(default=False)
def __str__(self):
return self.iso
class Meta:
ordering = ("iso",)
# a base class for Recommender and Recommendation
class Title(models.Model):
pass
class TitleTranslation(models.Model):
title = models.ForeignKey(Title, models.CASCADE)
text = models.CharField(max_length=100)
class Recommender(Title):
pass
class Recommendation(Title):
the_recommender = models.ForeignKey(Recommender, models.CASCADE)
class Collector(models.Model):
name = models.CharField(max_length=100)
class Widget(models.Model):
owner = models.ForeignKey(Collector, models.CASCADE)
name = models.CharField(max_length=100)
class DooHickey(models.Model):
code = models.CharField(max_length=10, primary_key=True)
owner = models.ForeignKey(Collector, models.CASCADE)
name = models.CharField(max_length=100)
class Grommet(models.Model):
code = models.AutoField(primary_key=True)
owner = models.ForeignKey(Collector, models.CASCADE)
name = models.CharField(max_length=100)
class Whatsit(models.Model):
index = models.IntegerField(primary_key=True)
owner = models.ForeignKey(Collector, models.CASCADE)
name = models.CharField(max_length=100)
class Doodad(models.Model):
name = models.CharField(max_length=100)
class FancyDoodad(Doodad):
owner = models.ForeignKey(Collector, models.CASCADE)
expensive = models.BooleanField(default=True)
class Category(models.Model):
collector = models.ForeignKey(Collector, models.CASCADE)
order = models.PositiveIntegerField()
class Meta:
ordering = ("order",)
def __str__(self):
return "%s:o%s" % (self.id, self.order)
def link_posted_default():
return datetime.date.today() - datetime.timedelta(days=7)
class Link(models.Model):
posted = models.DateField(default=link_posted_default)
url = models.URLField()
post = models.ForeignKey("Post", models.CASCADE)
readonly_link_content = models.TextField()
class PrePopulatedPost(models.Model):
title = models.CharField(max_length=100)
published = models.BooleanField(default=False)
slug = models.SlugField()
class PrePopulatedSubPost(models.Model):
post = models.ForeignKey(PrePopulatedPost, models.CASCADE)
subtitle = models.CharField(max_length=100)
subslug = models.SlugField()
class Post(models.Model):
title = models.CharField(
max_length=100, help_text="Some help text for the title (with Unicode ŠĐĆŽćžšđ)"
)
content = models.TextField(
help_text="Some help text for the content (with Unicode ŠĐĆŽćžšđ)"
)
readonly_content = models.TextField()
posted = models.DateField(
default=datetime.date.today,
help_text="Some help text for the date (with Unicode ŠĐĆŽćžšđ)",
)
public = models.BooleanField(null=True, blank=True)
def awesomeness_level(self):
return "Very awesome."
# Proxy model to test overridden fields attrs on Post model so as not to
# interfere with other tests.
class FieldOverridePost(Post):
class Meta:
proxy = True
class Gadget(models.Model):
name = models.CharField(max_length=100)
def __str__(self):
return self.name
class Villain(models.Model):
name = models.CharField(max_length=100)
def __str__(self):
return self.name
class SuperVillain(Villain):
pass
class FunkyTag(models.Model):
"Because we all know there's only one real use case for GFKs."
name = models.CharField(max_length=25)
content_type = models.ForeignKey(ContentType, models.CASCADE)
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey("content_type", "object_id")
def __str__(self):
return self.name
class Plot(models.Model):
name = models.CharField(max_length=100)
team_leader = models.ForeignKey(Villain, models.CASCADE, related_name="lead_plots")
contact = models.ForeignKey(Villain, models.CASCADE, related_name="contact_plots")
tags = GenericRelation(FunkyTag)
def __str__(self):
return self.name
class PlotDetails(models.Model):
details = models.CharField(max_length=100)
plot = models.OneToOneField(Plot, models.CASCADE, null=True, blank=True)
def __str__(self):
return self.details
class PlotProxy(Plot):
class Meta:
proxy = True
class SecretHideout(models.Model):
"""Secret! Not registered with the admin!"""
location = models.CharField(max_length=100)
villain = models.ForeignKey(Villain, models.CASCADE)
def __str__(self):
return self.location
class SuperSecretHideout(models.Model):
"""Secret! Not registered with the admin!"""
location = models.CharField(max_length=100)
supervillain = models.ForeignKey(SuperVillain, models.CASCADE)
def __str__(self):
return self.location
class Bookmark(models.Model):
name = models.CharField(max_length=60)
tag = GenericRelation(FunkyTag, related_query_name="bookmark")
def __str__(self):
return self.name
class CyclicOne(models.Model):
name = models.CharField(max_length=25)
two = models.ForeignKey("CyclicTwo", models.CASCADE)
def __str__(self):
return self.name
class CyclicTwo(models.Model):
name = models.CharField(max_length=25)
one = models.ForeignKey(CyclicOne, models.CASCADE)
def __str__(self):
return self.name
class Topping(models.Model):
name = models.CharField(max_length=20)
def __str__(self):
return self.name
class Pizza(models.Model):
name = models.CharField(max_length=20)
toppings = models.ManyToManyField("Topping", related_name="pizzas")
# Pizza's ModelAdmin has readonly_fields = ['toppings'].
# toppings is editable for this model's admin.
class ReadablePizza(Pizza):
class Meta:
proxy = True
# No default permissions are created for this model and both name and toppings
# are readonly for this model's admin.
class ReadOnlyPizza(Pizza):
class Meta:
proxy = True
default_permissions = ()
class Album(models.Model):
owner = models.ForeignKey(User, models.SET_NULL, null=True, blank=True)
title = models.CharField(max_length=30)
class Song(models.Model):
name = models.CharField(max_length=20)
album = models.ForeignKey(Album, on_delete=models.RESTRICT)
def __str__(self):
return self.name
class Employee(Person):
code = models.CharField(max_length=20)
class Meta:
ordering = ["name"]
class WorkHour(models.Model):
datum = models.DateField()
employee = models.ForeignKey(Employee, models.CASCADE)
class Manager(Employee):
"""
A multi-layer MTI child.
"""
pass
class Bonus(models.Model):
recipient = models.ForeignKey(Manager, on_delete=models.CASCADE)
class Question(models.Model):
big_id = models.BigAutoField(primary_key=True)
question = models.CharField(max_length=20)
posted = models.DateField(default=datetime.date.today)
expires = models.DateTimeField(null=True, blank=True)
related_questions = models.ManyToManyField("self")
uuid = models.UUIDField(default=uuid.uuid4, unique=True)
def __str__(self):
return self.question
class Answer(models.Model):
question = models.ForeignKey(Question, models.PROTECT)
question_with_to_field = models.ForeignKey(
Question,
models.SET_NULL,
blank=True,
null=True,
to_field="uuid",
related_name="uuid_answers",
limit_choices_to=~models.Q(question__istartswith="not"),
)
related_answers = models.ManyToManyField("self")
answer = models.CharField(max_length=20)
def __str__(self):
return self.answer
class Answer2(Answer):
class Meta:
proxy = True
class Reservation(models.Model):
start_date = models.DateTimeField()
price = models.IntegerField()
class FoodDelivery(models.Model):
DRIVER_CHOICES = (
("bill", "Bill G"),
("steve", "Steve J"),
)
RESTAURANT_CHOICES = (
("indian", "A Taste of India"),
("thai", "Thai Pography"),
("pizza", "Pizza Mama"),
)
reference = models.CharField(max_length=100)
driver = models.CharField(max_length=100, choices=DRIVER_CHOICES, blank=True)
restaurant = models.CharField(
max_length=100, choices=RESTAURANT_CHOICES, blank=True
)
class Meta:
unique_together = (("driver", "restaurant"),)
class CoverLetter(models.Model):
author = models.CharField(max_length=30)
date_written = models.DateField(null=True, blank=True)
def __str__(self):
return self.author
class Paper(models.Model):
title = models.CharField(max_length=30)
author = models.CharField(max_length=30, blank=True, null=True)
class ShortMessage(models.Model):
content = models.CharField(max_length=140)
timestamp = models.DateTimeField(null=True, blank=True)
class Telegram(models.Model):
title = models.CharField(max_length=30)
date_sent = models.DateField(null=True, blank=True)
def __str__(self):
return self.title
class Story(models.Model):
title = models.CharField(max_length=100)
content = models.TextField()
class OtherStory(models.Model):
title = models.CharField(max_length=100)
content = models.TextField()
class ComplexSortedPerson(models.Model):
name = models.CharField(max_length=100)
age = models.PositiveIntegerField()
is_employee = models.BooleanField(null=True)
class PluggableSearchPerson(models.Model):
name = models.CharField(max_length=100)
age = models.PositiveIntegerField()
class PrePopulatedPostLargeSlug(models.Model):
"""
Regression test for #15938: a large max_length for the slugfield must not
be localized in prepopulated_fields_js.html or it might end up breaking
the JavaScript (ie, using THOUSAND_SEPARATOR ends up with maxLength=1,000)
"""
title = models.CharField(max_length=100)
published = models.BooleanField(default=False)
# `db_index=False` because MySQL cannot index large CharField (#21196).
slug = models.SlugField(max_length=1000, db_index=False)
class AdminOrderedField(models.Model):
order = models.IntegerField()
stuff = models.CharField(max_length=200)
class AdminOrderedModelMethod(models.Model):
order = models.IntegerField()
stuff = models.CharField(max_length=200)
@admin.display(ordering="order")
def some_order(self):
return self.order
class AdminOrderedAdminMethod(models.Model):
order = models.IntegerField()
stuff = models.CharField(max_length=200)
class AdminOrderedCallable(models.Model):
order = models.IntegerField()
stuff = models.CharField(max_length=200)
class Report(models.Model):
title = models.CharField(max_length=100)
def __str__(self):
return self.title
class MainPrepopulated(models.Model):
name = models.CharField(max_length=100)
pubdate = models.DateField()
status = models.CharField(
max_length=20,
choices=(("option one", "Option One"), ("option two", "Option Two")),
)
slug1 = models.SlugField(blank=True)
slug2 = models.SlugField(blank=True)
slug3 = models.SlugField(blank=True, allow_unicode=True)
class RelatedPrepopulated(models.Model):
parent = models.ForeignKey(MainPrepopulated, models.CASCADE)
name = models.CharField(max_length=75)
fk = models.ForeignKey("self", models.CASCADE, blank=True, null=True)
m2m = models.ManyToManyField("self", blank=True)
pubdate = models.DateField()
status = models.CharField(
max_length=20,
choices=(("option one", "Option One"), ("option two", "Option Two")),
)
slug1 = models.SlugField(max_length=50)
slug2 = models.SlugField(max_length=60)
class UnorderedObject(models.Model):
"""
Model without any defined `Meta.ordering`.
Refs #16819.
"""
name = models.CharField(max_length=255)
bool = models.BooleanField(default=True)
class UndeletableObject(models.Model):
"""
Model whose show_delete in admin change_view has been disabled
Refs #10057.
"""
name = models.CharField(max_length=255)
class UnchangeableObject(models.Model):
"""
Model whose change_view is disabled in admin
Refs #20640.
"""
class UserMessenger(models.Model):
"""
Dummy class for testing message_user functions on ModelAdmin
"""
class Simple(models.Model):
"""
Simple model with nothing on it for use in testing
"""
class Choice(models.Model):
choice = models.IntegerField(
blank=True,
null=True,
choices=((1, "Yes"), (0, "No"), (None, "No opinion")),
)
class ParentWithDependentChildren(models.Model):
"""
Issue #20522
Model where the validation of child foreign-key relationships depends
on validation of the parent
"""
some_required_info = models.PositiveIntegerField()
family_name = models.CharField(max_length=255, blank=False)
class DependentChild(models.Model):
"""
Issue #20522
Model that depends on validation of the parent class for one of its
fields to validate during clean
"""
parent = models.ForeignKey(ParentWithDependentChildren, models.CASCADE)
family_name = models.CharField(max_length=255)
class _Manager(models.Manager):
def get_queryset(self):
return super().get_queryset().filter(pk__gt=1)
class FilteredManager(models.Model):
def __str__(self):
return "PK=%d" % self.pk
pk_gt_1 = _Manager()
objects = models.Manager()
class EmptyModelVisible(models.Model):
"""See ticket #11277."""
class EmptyModelHidden(models.Model):
"""See ticket #11277."""
class EmptyModelMixin(models.Model):
"""See ticket #11277."""
class State(models.Model):
name = models.CharField(max_length=100, verbose_name="State verbose_name")
class City(models.Model):
state = models.ForeignKey(State, models.CASCADE)
name = models.CharField(max_length=100, verbose_name="City verbose_name")
def get_absolute_url(self):
return "/dummy/%s/" % self.pk
class Restaurant(models.Model):
city = models.ForeignKey(City, models.CASCADE)
name = models.CharField(max_length=100)
def get_absolute_url(self):
return "/dummy/%s/" % self.pk
class Worker(models.Model):
work_at = models.ForeignKey(Restaurant, models.CASCADE)
name = models.CharField(max_length=50)
surname = models.CharField(max_length=50)
# Models for #23329
class ReferencedByParent(models.Model):
name = models.CharField(max_length=20, unique=True)
class ParentWithFK(models.Model):
fk = models.ForeignKey(
ReferencedByParent,
models.CASCADE,
to_field="name",
related_name="hidden+",
)
class ChildOfReferer(ParentWithFK):
pass
# Models for #23431
class InlineReferer(models.Model):
pass
class ReferencedByInline(models.Model):
name = models.CharField(max_length=20, unique=True)
class InlineReference(models.Model):
referer = models.ForeignKey(InlineReferer, models.CASCADE)
fk = models.ForeignKey(
ReferencedByInline,
models.CASCADE,
to_field="name",
related_name="hidden+",
)
class Recipe(models.Model):
rname = models.CharField(max_length=20, unique=True)
class Ingredient(models.Model):
iname = models.CharField(max_length=20, unique=True)
recipes = models.ManyToManyField(Recipe, through="RecipeIngredient")
class RecipeIngredient(models.Model):
ingredient = models.ForeignKey(Ingredient, models.CASCADE, to_field="iname")
recipe = models.ForeignKey(Recipe, models.CASCADE, to_field="rname")
# Model for #23839
class NotReferenced(models.Model):
# Don't point any FK at this model.
pass
# Models for #23934
class ExplicitlyProvidedPK(models.Model):
name = models.IntegerField(primary_key=True)
class ImplicitlyGeneratedPK(models.Model):
name = models.IntegerField(unique=True)
# Models for #25622
class ReferencedByGenRel(models.Model):
content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey("content_type", "object_id")
class GenRelReference(models.Model):
references = GenericRelation(ReferencedByGenRel)
class ParentWithUUIDPK(models.Model):
id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
title = models.CharField(max_length=100)
def __str__(self):
return str(self.id)
class RelatedWithUUIDPKModel(models.Model):
parent = models.ForeignKey(
ParentWithUUIDPK, on_delete=models.SET_NULL, null=True, blank=True
)
class Author(models.Model):
pass
class Authorship(models.Model):
book = models.ForeignKey(Book, models.CASCADE)
author = models.ForeignKey(Author, models.CASCADE)
class UserProxy(User):
"""Proxy a model with a different app_label."""
class Meta:
proxy = True
class ReadOnlyRelatedField(models.Model):
chapter = models.ForeignKey(Chapter, models.CASCADE)
language = models.ForeignKey(Language, models.CASCADE)
user = models.ForeignKey(User, models.CASCADE)
class Héllo(models.Model):
pass
class Box(models.Model):
title = models.CharField(max_length=100)
next_box = models.ForeignKey(
"self", null=True, on_delete=models.SET_NULL, blank=True
)
next_box = models.ForeignKey(
"self", null=True, on_delete=models.SET_NULL, blank=True
)
class Country(models.Model):
NORTH_AMERICA = "North America"
SOUTH_AMERICA = "South America"
EUROPE = "Europe"
ASIA = "Asia"
OCEANIA = "Oceania"
ANTARCTICA = "Antarctica"
CONTINENT_CHOICES = [
(NORTH_AMERICA, NORTH_AMERICA),
(SOUTH_AMERICA, SOUTH_AMERICA),
(EUROPE, EUROPE),
(ASIA, ASIA),
(OCEANIA, OCEANIA),
(ANTARCTICA, ANTARCTICA),
]
name = models.CharField(max_length=80)
continent = models.CharField(max_length=13, choices=CONTINENT_CHOICES)
def __str__(self):
return self.name
class Traveler(models.Model):
born_country = models.ForeignKey(Country, models.CASCADE)
living_country = models.ForeignKey(
Country, models.CASCADE, related_name="living_country_set"
)
favorite_country_to_vacation = models.ForeignKey(
Country,
models.CASCADE,
related_name="favorite_country_to_vacation_set",
limit_choices_to={"continent": Country.ASIA},
)
class Square(models.Model):
side = models.IntegerField()
area = models.GeneratedField(
db_persist=True,
expression=models.F("side") * models.F("side"),
output_field=models.BigIntegerField(),
)
class Meta:
required_db_features = {"supports_stored_generated_columns"}