多表创建，一对一，一对多，多对多

'''
1  models  导入模块

from django.contrib.auth.models import AbstractUser

2 settings　注册

AUTH_USER_MODEL = 'app01.UserInfo'

3  创建表

4 创建表关系 多表创建，一对一，一对多，多对多

'''



from django.db import models

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


class UserInfo(AbstractUser):
    phone = models.BigIntegerField(verbose_name='手机号',null=True)
    # 头象
    avatar = models.FileField(upload_to='avatar/',default='avatar/default.png')
    '''
    给avatar字段传文件对象，该文件会自动存储到avatar 文件下然后avatar字段只保个子文件的路径
    '''
    create_time = models.DateField(auto_now_add=True)
    # 外键字段
    blog = models.OneToOneField(to='Blog',null=True,on_delete=models.CASCADE)

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)

    # 存css ,js 样式路径
    site_theme = models.CharField(verbose_name='站点样式',max_length=64)

class Category(models.Model):
    name = models.CharField(verbose_name='文章分类',max_length=32)
    # 外键字段
    blog = models.ForeignKey(to='Blog',null=True,on_delete=models.CASCADE)

class Tag(models.Model):
    name = models.CharField(verbose_name='文章标签',max_length=32)
    # 外键字段
    blog = models.ForeignKey(to='Blog',null=True,on_delete=models.CASCADE)

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)
    # 文章内容有很多 一般情况下都是使用TextField,
    content = models.TextField(verbose_name='文章内容')
    create_time = models.DateField(auto_now_add=True)

    #   数据库字段设计优化
    up_num = models.BigIntegerField(verbose_name='点赞数',default=0)
    down_num = models.BigIntegerField(verbose_name='点踩数',default=0)
    comment_num = models.BigIntegerField(verbose_name='评论数',default=0)
    # 外键字段
    blog = models.ForeignKey(to='Blog',null=True,on_delete=models.CASCADE)
    category = models.ForeignKey(to='Category',null=True,on_delete=models.CASCADE)

    #多对多
    tags = models.ManyToManyField(to=Tag,
                                  through='Article2Tag',
                                  through_fields=('article','tag'),
                                  )

    #多对多三个种创建 ，半自动

class Article2Tag(models.Model):
    article = models.ForeignKey(to='Article',on_delete=models.CASCADE)

    tag =models.ForeignKey(to='Tag',on_delete=models.CASCADE)


class UpAndDown(models.Model):
    user = models.ForeignKey(to='UserInfo',on_delete=models.CASCADE)
    article = models.ForeignKey(to='Article',on_delete=models.CASCADE)
    is_up = models.BooleanField() # 传布尔值 存0、1

class Comment(models.Model):
    user = models.ForeignKey(to='UserInfo',on_delete=models.CASCADE)
    article = models.ForeignKey(to='Article',on_delete=models.CASCADE)
    content = models.CharField(verbose_name='评论内容',max_length=255)
    content_time =models.DateField(verbose_name='评论时间', auto_now_add=True)

    # 自关联
    parent = models.ForeignKey(to='self',null=True,on_delete=models.CASCADE)