python3进阶开发-第一个仿博客园的项目（1）详解编程语言

from django.db import models 
 
# Create your models here. 
from django.contrib.auth.models import AbstractUser 
 
class UserInfo(AbstractUser): 
    """ 
    用户信息表 
    """ 
    nid = models.AutoField(primary_key=True) 
    phone = models.CharField(max_length=11, null=True, unique=True) 
    avatar = models.FileField(upload_to="avatars/", default="avatars/default.png") 
 
    blog = models.OneToOneField(to="Blog", to_field="nid", null=True) 
 
    def __str__(self): 
        return self.username 
 
    class Meta: 
        verbose_name = "用户信息" 
        verbose_name_plural = verbose_name 
 
 
class Blog(models.Model): 
    """ 
    博客信息 
    """ 
    nid = models.AutoField(primary_key=True) 
    title = models.CharField(max_length=64)  # 个人博客标题 
    theme = models.CharField(max_length=32)  # 博客主题 
 
    def __str__(self): 
        return self.title 
 
    class Meta: 
        verbose_name = "博客" 
        verbose_name_plural = verbose_name 
 
 
class Category(models.Model): 
    """ 
    个人博客文章分类 
    """ 
    nid = models.AutoField(primary_key=True) 
    title = models.CharField(max_length=32)  # 分类标题 
    blog = models.ForeignKey(to="Blog", to_field="nid")  # 外键关联博客，一个博客站点可以有多个分类 
 
    def __str__(self): 
        return "{}-{}".format(self.blog.title, self.title) 
 
    class Meta: 
        verbose_name = "文章分类" 
        verbose_name_plural = verbose_name 
 
 
class Tag(models.Model): 
    """ 
    标签 
    """ 
    nid = models.AutoField(primary_key=True) 
    title = models.CharField(max_length=32)  # 标签名 
    blog = models.ForeignKey(to="Blog", to_field="nid")  # 所属博客 
 
    def __str__(self): 
        return self.title 
 
    class Meta: 
        verbose_name = "标签" 
        verbose_name_plural = verbose_name 
 
 
class Article(models.Model): 
    """ 
    文章 
    """ 
    nid = models.AutoField(primary_key=True) 
    title = models.CharField(max_length=50)  # 文章标题 
    desc = models.CharField(max_length=255)  # 文章描述 
    create_time = models.DateTimeField(auto_now_add=True)  # 创建时间 
    category = models.ForeignKey(to="Category", to_field="nid", null=True) 
 
    user = models.ForeignKey(to="UserInfo", to_field="nid") 
 
    tags = models.ManyToManyField( 
        to="Tag", 
        through="Article2Tag", 
        through_fields=("article", "tag"), 
    ) 
 
    def __str__(self): 
        return self.title 
 
    class Meta: 
        verbose_name = "文章" 
        verbose_name_plural = verbose_name 
 
 
class ArticleDetail(models.Model): 
    """ 
    文章详情表 
    """ 
    nid = models.AutoField(primary_key=True) 
    content = models.TextField() 
    article = models.OneToOneField(to="Article", to_field="nid") 
 
    class Meta: 
        verbose_name = "文章详情" 
        verbose_name_plural = verbose_name 
 
 
class Article2Tag(models.Model): 
    """ 
    文章和标签的多对多关系表 
    """ 
    nid = models.AutoField(primary_key=True) 
    article = models.ForeignKey(to="Article", to_field="nid") 
    tag = models.ForeignKey(to="Tag", to_field="nid") 
 
    def __str__(self): 
        return "{}-{}".format(self.article, self.tag) 
 
    class Meta: 
        unique_together = (("article", "tag"),) 
        verbose_name = "文章-标签" 
        verbose_name_plural = verbose_name 
 
 
class ArticleUpDown(models.Model): 
    """ 
    点赞表 
    """ 
    nid = models.AutoField(primary_key=True) 
    user = models.ForeignKey(to="UserInfo", null=True) 
    article = models.ForeignKey(to="Article", null=True) 
    is_up = models.BooleanField(default=True) 
 
    class Meta: 
        unique_together = (("article", "user"),) 
        verbose_name = "点赞" 
        verbose_name_plural = verbose_name 
 
 
class Comment(models.Model): 
    """ 
    评论表 
    """ 
    nid = models.AutoField(primary_key=True) 
    article = models.ForeignKey(to="Article", to_field="nid") 
    user = models.ForeignKey(to="UserInfo", to_field="nid") 
    content = models.CharField(max_length=255)  # 评论内容 
    create_time = models.DateTimeField(auto_now_add=True) 
    parent_comment = models.ForeignKey("self", null=True) 
 
    def __str__(self): 
        return self.content 
 
    class Meta: 
        verbose_name = "评论" 
        verbose_name_plural = verbose_name