6.2 - BBS + BLOG系统

一、简介

二、数据库

知识点：

1.继承AbstractUser
    目的：为了使用用户认证组件 auth User
    配置：AUTH_USER_MODEL = "blog.UserInfo"

    class UserInfo(AbstractUser):
        ...


2.中介模型
    多对多，第三张表自己生成。
    class Article(models.Model):
        ...
        tags = models.ManyToManyField(to='Tag', through='Article2Tag', through_fields=('article', 'tag'))

    class Article2Tag(models.Model):
        ...
        class Meta:   # 联合唯一
            unique_together = [
                ('article', 'tag'),
        ]

3.联合唯一
    class ArticleUpDown(models.Model):
        nid = models.AutoField(primary_key=True)
        user = models.ForeignKey("UserInfo", null=True, on_delete=models.CASCADE)
        article = models.ForeignKey('Article', null=True, on_delete=models.CASCADE)

        class Meta:    # 联合唯一
            unique_together = [
                ('user', 'article'),
            ]

 

from django.db import models
from django.contrib.auth.models import AbstractUser


class UserInfo(AbstractUser):
    """
    用户信息
    """
    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)

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

    def __str__(self):
        return self.username


class Blog(models.Model):
    """
    博客信息
    """
    nid = models.AutoField(primary_key=True)
    title = models.CharField(verbose_name='个人博客标题', max_length=64)
    site = models.CharField(verbose_name='个人博客后缀', max_length=32, unique=True)
    theme = models.CharField(verbose_name='博客主题', max_length=32)

    def __str__(self):
        return self.title


class Category(models.Model):
    """
    博主个人文章分类表
    """
    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 Tag(models.Model):
    """
    博主个人文章标签表
    """
    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 Article(models.Model):
    """
    文章信息
    comment_count up_count down_count 为了查询时，效率高。
    """
    nid = models.AutoField(primary_key=True)
    title = models.CharField(max_length=50, verbose_name='文章标题')
    desc = models.CharField(max_length=255, verbose_name='文章描述')
    create_time = models.DateTimeField(verbose_name='创建时间', auto_now_add=True)

    comment_count = models.IntegerField(default=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)
    tags = models.ManyToManyField(to='Tag', through='Article2Tag', through_fields=('article', 'tag'))

    def __str__(self):
        return self.title


class ArticleDetail(models.Model):
    """
    文章详细表
    """
    nid = models.AutoField(primary_key=True)
    content = models.TextField()
    article = models.OneToOneField(to='Article', to_field='nid', on_delete=models.CASCADE)


class Article2Tag(models.Model):
    """
    多对多， 文章、标签的第三张表
    """
    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:
        unique_together = [
            ('article', 'tag'),
        ]

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


class ArticleUpDown(models.Model):
    """
    点赞，踩灭表
    """
    nid = models.AutoField(primary_key=True)
    user = models.ForeignKey("UserInfo", null=True, on_delete=models.CASCADE)
    article = models.ForeignKey('Article', null=True, on_delete=models.CASCADE)

    class Meta:
        unique_together = [
            ('user', 'article'),
        ]


class Comment(models.Model):
    """
    评论表
    """
    nid = models.AutoField(primary_key=True)
    user = models.ForeignKey(verbose_name='评论者', to='UserInfo', to_field='nid', on_delete=models.CASCADE)
    article = models.ForeignKey(verbose_name='评论文章', to='Article', to_field='nid', on_delete=models.CASCADE)
    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)

    parent_comment = models.ForeignKey('self', null=True, on_delete=models.CASCADE)

    def __str__(self):
        return self.content

models.py

三、其它