首先我們要設計一下表結構：

UserInfo(用戶信息表) --------》一對一 -----------》Blog(博客信息表)

UserInfo(用戶信息表) ---------》一對多 -----------》Article UpDown(點贊表)

UserInfo(用戶信息表) ---------》一對多 -----------》Article Comment(評論表)

UserInfo(用戶信息表)----------》一對多 -----------》Article(文章)

Blog(博客信息表) ----------------》 一對多 -----------》Category(個人博客文章分類表)

Blog(博客信息表) ----------------》一對多 ------------》Tag(標簽表)

Category(個人博客文章分類表)--》 一對多 -------------》Article(文章表)

Tag(標簽表) --------------------------》多對多 -------------》Article(文章表)

Article(文章表) ------------------------》一對一 -------------》ArticleDetail(文章詳情表)

Article(文章表) ------------------------》一對多 --------------》Article UpDown(點贊表)

Article(文章表) ------------------------》一對多 ---------------》Article Comment(評論表)

from django.db import models

# Create your models here.
from django.contrib.auth.models import AbstractUser

class UserInfo(AbstractUser):
    """
    用戶信息表
    """
    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 = "用戶信息"
        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)  # 個人博客標題
    theme = models.CharField(max_length=32)  # 博客主題

    def __str__(self):
        return self.title

    class Meta:
        verbose_name = "博客"
        verbose_name_plural = verbose_name


class Category(models.Model):
    """
    個人博客文章分類
    """
    nid = models.AutoField(primary_key=True)
    title = models.CharField(max_length=32)  # 分類標題
    blog = models.ForeignKey(to="Blog", to_field="nid")  # 外鍵關聯博客，一個博客站點可以有多個分類

    def __str__(self):
        return "{}-{}".format(self.blog.title, self.title)

    class Meta:
        verbose_name = "文章分類"
        verbose_name_plural = verbose_name


class Tag(models.Model):
    """
    標簽
    """
    nid = models.AutoField(primary_key=True)
    title = models.CharField(max_length=32)  # 標簽名
    blog = models.ForeignKey(to="Blog", to_field="nid")  # 所屬博客

    def __str__(self):
        return self.title

    class Meta:
        verbose_name = "標簽"
        verbose_name_plural = verbose_name


class Article(models.Model):
    """
    文章
    """
    nid = models.AutoField(primary_key=True)
    title = models.CharField(max_length=50)  # 文章標題
    desc = models.CharField(max_length=255)  # 文章描述
    create_time = models.DateTimeField(auto_now_add=True)  # 創建時間
    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):
    """
    文章詳情表
    """
    nid = models.AutoField(primary_key=True)
    content = models.TextField()
    article = models.OneToOneField(to="Article", to_field="nid")

    class Meta:
        verbose_name = "文章詳情"
        verbose_name_plural = verbose_name


class Article2Tag(models.Model):
    """
    文章和標簽的多對多關系表
    """
    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-標簽"
        verbose_name_plural = verbose_name


class ArticleUpDown(models.Model):
    """
    點贊表
    """
    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 = "點贊"
        verbose_name_plural = verbose_name


class Comment(models.Model):
    """
    評論表
    """
    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)  # 評論內容
    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 = "評論"
        verbose_name_plural = verbose_name

python3進階開發-第一個仿博客園的項目（1）