Django 项目试炼blog（1）

　　1、确定表结构

from django.contrib.auth.models import AbstractUser

class UserInfo(AbstractUser):
    """
    用户信息表, 继承session生成的auth_user表
    需要在setting中加入 AUTH_USER_MODEL = 'app01.UserInfo'
    """
    nid = models.AutoField(primary_key=True)
    telephone = models.CharField(max_length=11, null=True, unique=True)
    avatar = models.FileField(upload_to='avatars/', default='/avatars/default.png')
    create_time = models.DateTimeField(verbose_name='创建时间', auto_now_add=True)          #当前时间

    blog = models.OneToOneField(to='Blog', to_field='nid', null=True, on_delete=models.CASCADE)

    def __str__(self):
        return self.username


class Blog(models.Model):
    """用户站点"""
    nid = models.AutoField(primary_key=True)
    title = models.CharField(verbose_name='个人博客标题', max_length=64)
    site_name = models.CharField(verbose_name='站点名称', max_length=64)
    theme = models.CharField(verbose_name='博客主题', max_length=32)

    def __str__(self):
        return self.title


class Tag(models.Model):
    """博客标签"""
    nid = models.AutoField(primary_key=True)
    title = models.CharField(verbose_name='标签名称', max_length=32)

    blog = models.ForeignKey(verbose_name='所属博客', to='Blog', to_field='nid', on_delete=models.CASCADE)

    def __str__(self):
        return self.title


class Category(models.Model):
    """博主文章分类"""
    nid = models.AutoField(primary_key=True)
    title = models.CharField(verbose_name='分类标题', max_length=32)

    blog = models.ForeignKey(verbose_name='所属博客', to='Blog', to_field='nid', on_delete=models.CASCADE)

    def __str__(self):
        return self.title


class Article(models.Model):
    """博客文章"""
    nid = models.AutoField(primary_key=True)
    title = models.CharField(verbose_name='文章标题', max_length=50)
    desc = models.CharField(verbose_name='文章秒速', max_length=255)
    create_time = models.DateTimeField(verbose_name='创建时间', auto_now_add=True)
    content = models.TextField()

    comment_count = models.IntegerField(default=0)  #评论数默认为0
    up_count = models.IntegerField(default=0)
    down_count = models.IntegerField(default=0)

    user = models.ForeignKey(verbose_name='作者', to='UserInfo', to_field='nid', on_delete=models.CASCADE)
    category = models.ForeignKey(to='Category', to_field='nid', null=True, on_delete=models.CASCADE)
    tag = models.ManyToManyField(
        to='Tag',
        through='Article2Tag',
        through_fields=('article', 'tag'))  #创建中间模型，自己生成多对多的对应关系表

    def __str__(self):
        return self.title


class Article2Tag(models.Model):
    nid = models.AutoField(primary_key=True)
    article = models.ForeignKey(verbose_name='文章', to='Article', to_field='nid', on_delete=models.CASCADE)
    tag = models.ForeignKey(verbose_name='标签', to='Tag', to_field='nid', on_delete=models.CASCADE)

    class Meta:   # 联合唯一 ，字段不能重复
        unique_together = [
            ('article', 'tag'),
        ]

    def __str__(self):
        v = self.article.title + '---' + self.tag.title
        return v


class ArticleUpDown(models.Model):
    """点赞表,用户1对文章2进行了T操作"""

    nid = models.AutoField(primary_key=True)
    user = models.ForeignKey(to='UserInfo', to_field='nid', null=True, on_delete=models.CASCADE)
    article = models.ForeignKey(to='Article', to_field='nid', null=True, on_delete=models.CASCADE)
    is_up = models.BooleanField(default=True)

    class Meta:   # 联合唯一 ，字段不能重复
        unique_together = [
            ('article', 'user'),
        ]


class Comment(models.Model):
    """评论表"""
    nid = models.AutoField(primary_key=True)
    content = models.CharField(verbose_name='评论内容', max_length=255)
    create_time = models.DateTimeField(verbose_name='创建时间', auto_now_add=True)  # 当前时间

    article = models.ForeignKey(verbose_name='评论文章', to='Article',to_field='nid', on_delete=models.CASCADE)
    user = models.ForeignKey(to='UserInfo', to_field='nid', null=True, on_delete=models.CASCADE)

    parent_comment = models.ForeignKey('self',null=True,on_delete=models.CASCADE)  #建立评论树

    def __str__(self):
        return self.content

---

2、重点内容：

　　想在session自建表auth-user表中增加字段，需要继承AbstractUser来实现，并且需要在项目配置文件中加入  AUTH_USER_MODEL = '应用名.表名'

AUTH_USER_MODEL = 'app01.UserInfo'

　　

　　  评论表表中的树结构