首页广告数据库表分析：
定义首页广告模型类：
contents.models.py
from django.db import models
from utils.models import BaseModel
class ContentCategory(BaseModel):
"""广告内容类别"""
name = models.CharField(max_length=50, verbose_name='名称')
key = models.CharField(max_length=50, verbose_name='类别键名')
class Meta:
db_table = 'tb_content_category'
verbose_name = '广告内容类别'
verbose_name_plural = verbose_name
def __str__(self):
return self.name
class Content(BaseModel):
"""广告内容"""
category = models.ForeignKey(ContentCategory, on_delete=models.PROTECT, verbose_name='类别')
title = models.CharField(max_length=100, verbose_name='标题')
url = models.CharField(max_length=300, verbose_name='内容链接')
image = models.ImageField(null=True, blank=True, verbose_name='图片')
text = models.TextField(null=True, blank=True, verbose_name='内容')
sequence = models.IntegerField(verbose_name='排序')
status = models.BooleanField(default=True, verbose_name='是否展示')
class Meta:
db_table = 'tb_content'
verbose_name = '广告内容'
verbose_name_plural = verbose_name
def __str__(self):
return self.category.name + ': ' + self.title
商品信息数据库表分析
分析：
tb_goods_category商品类别表中有一个字段parent，类似省市区三级联动，是自关联的关系，项目页面商品也是属于三级联动，是一张自关联的表。
商品频道与商品类别是一级分类，一对一的关系，本项目中商品频道共37个
商品频道组与商品频道，属于一对多的关系，本项目中商品频道组共11个
tb_brand商品品牌： 比如：小米，华为，iphone 等品牌 tb_brand商品品牌 与tb_spu商品
属于一对多的关系
tb_spu商品 ：如 小米5,6,7,8,9,10，华为11，iphone12 等
tb_sku商品 : 如小米10，256G，黑色 联通版，移动版 64G 等
tb_sku商品中的 default_image_url （默认图片链接地址），项目中有很多图片展示，可以将默认的图片放在 tb_sku商品中的default_image_url ，其他的图片可以另外存储到 tb_sku_image sku图片中
tb_sku_specification 规格表：相当于中间表，除了主键就是外键 ，用来查询的，
tb_spu_specification 规格 - 如：商品-衣服 规格就有： 尺码 颜色 数量等
tb_specification_option规格: 保存规格的具体内容 如：尺码 S M L 数量 12件 颜色：黑色，黄色，绿色
tb_specification_option规格中的sku_id与tb_sku商品表有外键关系，以便查询具体规格
StarUML(UNREGISTERED) 画图工具软件
定义模型：
goods/models.py
from django.db import models
from utils.models import BaseModel
# Create your models here.
class GoodsCategory(BaseModel):
"""商品类别"""
name = models.CharField(max_length=10, verbose_name='名称')
parent = models.ForeignKey('self', related_name='subs', null=True, blank=True, on_delete=models.CASCADE, verbose_name='父类别')
class Meta:
db_table = 'tb_goods_category'
verbose_name = '商品类别'
verbose_name_plural = verbose_name
def __str__(self):
return self.name
class GoodsChannelGroup(BaseModel):
"""商品频道组"""
name = models.CharField(max_length=20, verbose_name='频道组名')
class Meta:
db_table = 'tb_channel_group'
verbose_name = '商品频道组'
verbose_name_plural = verbose_name
def __str__(self):
return self.name
class GoodsChannel(BaseModel):
"""商品频道"""
group = models.ForeignKey(GoodsChannelGroup, on_delete=models.CASCADE, verbose_name='频道组名')
category = models.ForeignKey(GoodsCategory, on_delete=models.CASCADE, verbose_name='顶级商品类别')
url = models.CharField(max_length=50, verbose_name='频道页面链接')
sequence = models.IntegerField(verbose_name='组内顺序')
class Meta:
db_table = 'tb_goods_channel'
verbose_name = '商品频道'
verbose_name_plural = verbose_name
def __str__(self):
return self.category.name
class Brand(BaseModel):
"""品牌"""
name = models.CharField(max_length=20, verbose_name='名称')
logo = models.ImageField(verbose_name='Logo图片')
first_letter = models.CharField(max_length=1, verbose_name='品牌首字母')
class Meta:
db_table = 'tb_brand'
verbose_name = '品牌'
verbose_name_plural = verbose_name
def __str__(self):
return self.name
class SPU(BaseModel):
"""商品SPU"""
name = models.CharField(max_length=50, verbose_name='名称')
brand = models.ForeignKey(Brand, on_delete=models.PROTECT, verbose_name='品牌')
category1 = models.ForeignKey(GoodsCategory, on_delete=models.PROTECT, related_name='cat1_spu', verbose_name='一级类别')
category2 = models.ForeignKey(GoodsCategory, on_delete=models.PROTECT, related_name='cat2_spu', verbose_name='二级类别')
category3 = models.ForeignKey(GoodsCategory, on_delete=models.PROTECT, related_name='cat3_spu', verbose_name='三级类别')
sales = models.IntegerField(default=0, verbose_name='销量')
comments = models.IntegerField(default=0, verbose_name='评价数')
desc_detail = models.TextField(default='', verbose_name='详细介绍')
desc_pack = models.TextField(default='', verbose_name='包装信息')
desc_service = models.TextField(default='', verbose_name='售后服务')
class Meta:
db_table = 'tb_spu'
verbose_name = '商品SPU'
verbose_name_plural = verbose_name
def __str__(self):
return self.name
class SKU(BaseModel):
"""商品SKU"""
name = models.CharField(max_length=50, verbose_name='名称')
caption = models.CharField(max_length=100, verbose_name='副标题')
spu = models.ForeignKey(SPU, on_delete=models.CASCADE, verbose_name='商品')
category = models.ForeignKey(GoodsCategory, on_delete=models.PROTECT, verbose_name='从属类别')
price = models.DecimalField(max_digits=10, decimal_places=2, verbose_name='单价')
cost_price = models.DecimalField(max_digits=10, decimal_places=2, verbose_name='进价')
market_price = models.DecimalField(max_digits=10, decimal_places=2, verbose_name='市场价')
stock = models.IntegerField(default=0, verbose_name='库存')
sales = models.IntegerField(default=0, verbose_name='销量')
comments = models.IntegerField(default=0, verbose_name='评价数')
is_launched = models.BooleanField(default=True, verbose_name='是否上架销售')
default_image_url = models.CharField(max_length=200, default='', null=True, blank=True, verbose_name='默认图片')
class Meta:
db_table = 'tb_sku'
verbose_name = '商品SKU'
verbose_name_plural = verbose_name
def __str__(self):
return '%s: %s' % (self.id, self.name)
class SKUImage(BaseModel):
"""SKU图片"""
sku = models.ForeignKey(SKU, on_delete=models.CASCADE, verbose_name='sku')
image = models.ImageField(verbose_name='图片')
class Meta:
db_table = 'tb_sku_image'
verbose_name = 'SKU图片'
verbose_name_plural = verbose_name
def __str__(self):
return '%s %s' % (self.sku.name, self.id)
class SPUSpecification(BaseModel):
"""商品SPU规格"""
spu = models.ForeignKey(SPU, on_delete=models.CASCADE, related_name='specs', verbose_name='商品SPU')
name = models.CharField(max_length=20, verbose_name='规格名称')
class Meta:
db_table = 'tb_spu_specification'
verbose_name = '商品SPU规格'
verbose_name_plural = verbose_name
def __str__(self):
return '%s: %s' % (self.spu.name, self.name)
class SpecificationOption(BaseModel):
"""规格选项"""
spec = models.ForeignKey(SPUSpecification, related_name='options', on_delete=models.CASCADE, verbose_name='规格')
value = models.CharField(max_length=20, verbose_name='选项值')
class Meta:
db_table = 'tb_specification_option'
verbose_name = '规格选项'
verbose_name_plural = verbose_name
def __str__(self):
return '%s - %s' % (self.spec, self.value)
class SKUSpecification(BaseModel):
"""SKU具体规格"""
sku = models.ForeignKey(SKU, related_name='specs', on_delete=models.CASCADE, verbose_name='sku')
spec = models.ForeignKey(SPUSpecification, on_delete=models.PROTECT, verbose_name='规格名称')
option = models.ForeignKey(SpecificationOption, on_delete=models.PROTECT, verbose_name='规格值')
class Meta:
db_table = 'tb_sku_specification'
verbose_name = 'SKU规格'
verbose_name_plural = verbose_name
def __str__(self):
return '%s: %s - %s' % (self.sku, self.spec.name, self.option.value)
将上表映射到数据库中：
