Django BBS项目 models.py 文件

from django.db import models
# Create your models here.
"""
    先写普通字段，之后再写外键字段   
"""
from django.contrib.auth.models import AbstractUser
# 用户表
class UserInfo(AbstractUser):
    phone = models.BigIntegerField(verbose_name='手机号',null=True)
    # 头像
    avatar = models.FileField(upload_to='avatar/', default='avatar/tou.jfif', verbose_name='用户头像')
    # """
    #     给avatar字段文件对象 该文件会自动存储到avatar文件夹下，然后avatar字段只保存文件路径avatar/tou.jfif
    # """
    create_time = models.DateField(auto_now_add=True)
    blog = models.OneToOneField(to='Blog', null=True)
# 个人站点表
class Blog(models.Model):
    site_name = models.CharField(verbose_name='站点名称', max_length=32)
    site_title = models.CharField(verbose_name='站点标题', max_length=32)
#     简单的模拟，认识样式内部原理的操作
    site_theme = models.CharField(verbose_name='站点样式', max_length=64)
# 文章分类
class Category(models.Model):
    name = models.CharField(verbose_name='文章分类', max_length=32)
    blog = models.ForeignKey(to='Blog', null=True)
class Tag(models.Model):
    name = models.CharField(verbose_name='文章标签', max_length=32)
    blog = models.ForeignKey(to='Blog', null=True)
# 文章表
class Article(models.Model):
    title = models.CharField(verbose_name='文章标题', max_length=64)
    desc = models.CharField(verbose_name='文章简介', max_length=255)
    # 文章内容，内容一般都有好多，一般情况下都使用，TextField
    content = models.TextField(verbose_name='文章内容')
    create_time = models.DateField(auto_now_add=True)
    # 数据库字段优化
    up_num = models.BigIntegerField(verbose_name='点菜数', default=0)
    down_num = models.BigIntegerField(verbose_name='点踩数',default=0)
    comment_num = models.BigIntegerField(verbose_name='评论数', default=0)
    blog = models.ForeignKey(to='Blog', null=True)
    category = models.ForeignKey(to=Category, null=True)
    tags = models.ManyToManyField(to='Tag',
                                  through='Article2Tag',
                                  through_fields=('article','tag')
                                  )
class Article2Tag(models.Model):
    article = models.ForeignKey(to='Article')
    tag = models.ForeignKey(to='Tag')
class UpAndDown(models.Model):
    user = models.ForeignKey(to='UserInfo')
    article = models.ForeignKey(to='Article')
    is_up = models.BooleanField()  # 传布尔值  存0/1
class Comment(models.Model):
    user = models.ForeignKey(to='UserInfo')
    article = models.ForeignKey(to='Article')
    content = models.CharField(verbose_name='评论内容', max_length=255)
    comment_time = models.DateTimeField(verbose_name='评论时间', auto_now_add=True)
    # 子关联
    parent = models.ForeignKey(to='self', null=True)  # 有些评论就是根评论