model格式

from django.db import models
from django.utils.html import format_html
# Create your models here.


class CategoryModel(models.Model):
    name = models.CharField(max_length=100,  null=False, verbose_name='类别名称')

    def __str__(self):
        return '类别:%s' % (self.name)

    def __repr__(self):
        return self.__str__()


#产品表
#blank=True，允许后台表单上传时候为空，颜色会变为灰色
#verbose_name=字段后台表单名称。
class ProductModel(models.Model):
    name = models.CharField(max_length=100, null=False,verbose_name='产品名称')
    prodectImg = models.FileField(upload_to='./static/upload/',blank=True,verbose_name='产品图片')
    brief = models.TextField(null=False,verbose_name='产品详情')
    pub_date = models.DateTimeField('发布时间', null=True,blank=True)
    category = models.ForeignKey(CategoryModel,on_delete=models.CASCADE)

    
    def __str__(self):
        return '%s产品:%s'%(self.id,self.name)
    
    def __repr__(self):
        return self.__str__()



    def imgShow(self):
        imgPath = str(self.prodectImg)
        # print(self.titleImg)
        imgPath = '/'+ imgPath
        # return '<img style="height:150px;auto;" src="%s" />'%imgPath

        return format_html(
            '<img style="height:150px;auto;" src="{}" />',
            imgPath,
        )

    def showProduct(self):
        return format_html(
            '<a href="/product/{}">{}</a>',
            self.id,
            self.name
        )

    class Meta:
        verbose_name = '产品管理'
        verbose_name_plural = '产品管理'


class OrderModel(models.Model):
    product = models.ForeignKey(ProductModel, on_delete=models.CASCADE)
    num = models.IntegerField()
    price = models.CharField(max_length=100)
    allPrice = models.CharField(max_length=100)

    def __str__(self):
        return '订单id:%s' % self.id

    def __repr__(self):
        return self.__str__()

    class Meta:
        verbose_name = '订单管理'
        verbose_name_plural = verbose_name



#1对1的操作
class zhangfu(models.Model):
    name = models.CharField(max_length=50)


class qizi(models.Model):
    name = models.CharField(max_length=50)
    zhangfu = models.OneToOneField('zhangfu', on_delete=models.CASCADE)


#1对多和1对1的操作
# p1 = ProductModel(name='xxx',brief='xxxx')

# order1 = OrderModel(product=p1,num='xxx',price='xxxxx')





#多对多的操作
#假设1篇文章可以在多个类别里，1个类别可以放多篇文章
#老师跟学生关系
class Student(models.Model):
    name = models.CharField(max_length=50)
    age = models.IntegerField(default=15)


class Teacher(models.Model):
    name = models.CharField(max_length=50)
    age = models.IntegerField(default=35)
    student = models.ManyToManyField('Student')

#多对多添加的操作
# t1 = Teacher(name='xxx')
# t1.student.set([多个学生对象])


# class SwiperModel(models.Model):
#     title = models.CharField(max_length=100, null=False)
#     swiperImg = models.FileField(upload_to='./static/upload/')

#     def imgShow(self):
#         imgPath = str(self.swiperImg)
#         # print(self.titleImg)
#         imgPath = imgPath.replace('static/', '')
#         return format_html(
#             '<img style="height:150px;auto;" src="/jingtai/{}" />',
#             imgPath,
#         )

#     class Meta:
#         verbose_name = '首页轮播图管理'
#         verbose_name_plural = '首页轮播图管理'