1、Django Admin学习模型

此专栏应用环境和模型基于此文

开发环境

系统：windows11

开发工具：vscode

开发语言：python 3.8

开发框架：django 3.2

数据库：mysql8.4.1

项目目录

settings

注册两个应用

python 复制代码

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'Entities',
    'Events',
]

Entities应用

models

python 复制代码

from django.db import models


class Category(models.Model):
    name = models.CharField(max_length=100)
    class Meta:
        verbose_name_plural = "Categories"
    def __str__(self):
        return self.name

class Origin(models.Model):
    name = models.CharField(max_length=100)
    def __str__(self):
        return self.name

class Entity(models.Model):
    GENDER_MALE = "Male"
    GENDER_FEMALE = "Female"
    GENDER_OTHERS = "Others/Unknown"
    name = models.CharField(max_length=100)
    alternative_name = models.CharField(
        max_length=100, null=True, blank=True
    )
    category = models.ForeignKey(Category, on_delete=models.CASCADE, verbose_name='类别')
    origin = models.ForeignKey(Origin, on_delete=models.CASCADE)
    gender = models.CharField(
        max_length=100,
        choices=(
            (GENDER_MALE, GENDER_MALE),
            (GENDER_FEMALE, GENDER_FEMALE),
            (GENDER_OTHERS, GENDER_OTHERS),
        )
    )
    description = models.TextField()
    def __str__(self):
        return self.name
    class Meta:
        abstract = True

class Hero(Entity):
    class Meta:
        verbose_name_plural = "Heroes"
    is_immortal = models.BooleanField(default=True)
    benevolence_factor = models.PositiveSmallIntegerField(
        help_text="How benevolent this hero is?"
    )
    arbitrariness_factor = models.PositiveSmallIntegerField(
        help_text="How arbitrary this hero is?"
    )
    # relationships
    father = models.ForeignKey(
        "self", related_name="+", null=True, blank=True, on_delete=models.SET_NULL
    )
    mother = models.ForeignKey(
        "self", related_name="+", null=True, blank=True, on_delete=models.SET_NULL
    )
    spouse = models.ForeignKey(
        "self", related_name="+", null=True, blank=True, on_delete=models.SET_NULL
    )

class Villain(Entity):
    is_immortal = models.BooleanField(default=False)
    malevolence_factor = models.PositiveSmallIntegerField(
        help_text="How malevolent this villain is?"
    )
    power_factor = models.PositiveSmallIntegerField(
        help_text="How powerful this villain is?"
    )
    is_unique = models.BooleanField(default=True)
    count = models.PositiveSmallIntegerField(default=1)

admin

python 复制代码

from django.contrib import admin  
from .models import Category, Origin, Hero, Villain  
  
admin.site.register(Category)  
admin.site.register(Origin)  
admin.site.register(Hero)  
admin.site.register(Villain)

Events应用

models

python 复制代码

from django.db import models
from Entities.models import Hero, Villain


class Epic(models.Model):
    name = models.CharField(max_length=255)
    participating_heroes = models.ManyToManyField(Hero)
    participating_villains = models.ManyToManyField(Villain)

class Event(models.Model):
    epic = models.ForeignKey(Epic, on_delete=models.CASCADE)
    details = models.TextField()
    years_ago = models.PositiveIntegerField()

class EventHero(models.Model):
    event = models.ForeignKey(Event, on_delete=models.CASCADE)
    hero = models.ForeignKey(Hero, on_delete=models.CASCADE)
    is_primary = models.BooleanField()

class EventVillain(models.Model):
    event = models.ForeignKey(Event, on_delete=models.CASCADE)
    hero = models.ForeignKey(Villain, on_delete=models.CASCADE)
    is_primary = models.BooleanField()

admin

python 复制代码

from django.contrib import admin  
from .models import Epic, Event, EventHero, EventVillain  
  
admin.site.register(Epic)  
admin.site.register(Event)  
admin.site.register(EventHero)  
admin.site.register(EventVillain)

呈现：

此之前，需设置settings时区，语言，创建管理员