我是 Django 的新手。如何将 COALESCE sql 查询集写入 django orm。
query = 'SELECT COALESCE(max(CAST(order_no as UNSIGNED)), 0) as o,id from nanossc_Sales_master'
模型.py
class Sales_master(models.Model):
slno = models.IntegerField(blank=True, null=True)
order_no = models.CharField(max_length=50, blank=True, null=True)
type = models.CharField(max_length=50, blank=True, null=True)
customer_id = models.CharField(max_length=50, blank=True, null=True)
customer_name = models.CharField(max_length=50, blank=True, null=True)
brand_name = models.CharField(max_length=50, blank=True, null=True)
name = models.CharField(max_length=50, blank=True, null=True)