在 Django 中设计爬虫系统的数据模型与多对多关系

# Django models.py
from django.db import modelsfrom django.utils import timezonefrom myapp.models.model_account import User
class SpiderTask(models.Model):    """爬虫任务表"""    PLATFORM_CHOICES = (        (1, 'Amazon'),        (2, 'Etsy'),        (3, 'Temu'),        (4, 'WalMart')    )    STATUS_CHOICES = (        (0, '进行中'),        (1, '已完成'),        (2, '异常'),    )    TYPE_CHOICES = (        (1, '列表页'),        (2, '详情页'),    )
    id = models.AutoField(primary_key=True, verbose_name='自增id')    user = models.ForeignKey(User, on_delete=models.CASCADE, verbose_name='用户')    platform = models.IntegerField(default=1, choices=PLATFORM_CHOICES, verbose_name='平台')    name = models.CharField(verbose_name="爬虫名称", max_length=255)    start_url = models.URLField(verbose_name="起始url", max_length=500, null=False)    spider_type = models.IntegerField(choices=TYPE_CHOICES, default=1, verbose_name='采集页面类型')    description = models.TextField(verbose_name="描述备注等", max_length=500, null=True, blank=True)    completed = models.IntegerField(choices=STATUS_CHOICES, default=0, verbose_name='完成状态')    created_at = models.DateTimeField(default=timezone.now, verbose_name='加入任务时间')    collection_status = models.IntegerField(choices=STATUS_CHOICES, default=0, verbose_name='采集状态')    completed_at = models.DateTimeField(null=True, blank=True, verbose_name='完成时间')
    products = models.ManyToManyField('SpiderProduct', verbose_name='关联商品', related_name='tasks')
    class Meta:        verbose_name = '爬虫任务'        verbose_name_plural = '爬虫任务'        unique_together = [['user', 'start_url']]
    def __str__(self):        return f"{self.platform} - {self.name}"

class SpiderProduct(models.Model):    """爬虫结果表"""    # 省略字段定义...
    class Meta:        verbose_name = '爬虫结果'        verbose_name_plural = '爬虫结果'
    def __str__(self):        return self.title