BBS数据库设计

数据库设计由来

项目的开发一般由架构师来先进行架构，核算开发成本和项目周期，配合前端，UI攻城狮，运维，DBA，项目经理，后端等

数据库设计环节可以说是整个动态网页项目的基础核心部分，合理的数据库设计，对用户体验，后期项目优化，维护，重构都有重要作用

好的数据库设计能力是架构师应有的技术指标，也是DBA的基准

废话不多说，上图：

数据库表（models.py）

from django.db import models

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", verbose_name="头像")
    create_time = models.DateTimeField(auto_now_add=True)

    blog = models.OneToOneField(to="Blog", to_field="nid", null=True)

    def __str__(self):
        return self.username

    class Meta:
        verbose_name = "用户"
        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
    site = models.CharField(max_length=32, unique=True)  # 个人博客后缀
    theme = models.CharField(max_length=32)  # 博客主题

    def __str__(self):
        return self.title

    class Meta:
        verbose_name = "blog站点"
        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 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,verbose_name="文章标题")  # 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
    comment_count=models.IntegerField(verbose_name="评论数" ,default=0)
    up_count=models.IntegerField(verbose_name="点赞数",default=0)
    down_count=models.IntegerField(verbose_name="踩数",default=0)   #因为查询评论数大于评论数所以可以直接定义一个字段，不用跨表查询，但后期需要在评论数中增加一条

    category = models.ForeignKey(to="Category", to_field="nid", null=True)
    user = models.ForeignKey(to="UserInfo", to_field="nid")
    tags = models.ManyToManyField(  # 中介模型
            to="Tag",
            through="Article2Tag",
            through_fields=("article", "tag"),  # 注意顺序！！！
    )

    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")

    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="文章点赞"
        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