django使用bulk_update批量更新数据

一、第一步，导入bulk_update包
from bulk_update.helper import bulk_update
二、写一个类

class CommonQuerySet(models.QuerySet):

    def bulk_update(self, objs, update_fields=None,
                    exclude_fields=None, batch_size=None):
        self._for_write = True
        using = self.db

        return bulk_update(
            objs, update_fields=update_fields,
            exclude_fields=exclude_fields, using=using,
            batch_size=batch_size)

　　

三、第三步，在需要使用批量更新的model类中，添加一行代码

class Track(models.Model):
    album = models.ForeignKey(Album, related_name='tracks', on_delete=models.CASCADE)
    order = models.IntegerField()
    title = models.CharField(max_length=100)
    duration = models.IntegerField()
     objects =CommonQuerySet.as_manager() 
　　

　　class Meta: 
　　　　unique_together = ('album', 'order') ordering = ['order']

　　

方法二：

第一步导入包

from django_bulk_update.helper import bulk_update
第二步使用

        prescription_item_objs = []
        for prescription_item_list in prescription_item_data:
            for i in prescription_item_list:
                prescription_dic[i.get('id')] = i.get('weight')
        for i in prescription_item_qs:
            i.weight = prescription_dic.get(i.id)
            prescription_item_objs.append(i)
        print(prescription_item_objs)
        bulk_update(
            prescription_item_objs, update_fields=['weight',]
        )