摘要：
Django的多表查询 假设有模型 class Category(models.Model): id = models.CharField(primary_key = True,max_length = 255) type_name = models.CharField(max_length = 2 阅读全文
摘要：
构建基类表 class Base(models.Model): create_time = model.TimeField(auto_now_add=True) update_time = model.TimeField(auto_now=True) class Meta: # 告诉django这是 阅读全文