两个方法其实是一种,用哪个都行,看实例:
方法一:
从list_filter中的字符串,找到model对象的字段,然后得到这个外键对应的类
![](https://images2017.cnblogs.com/blog/706175/201711/706175-20171102171626966-1538587838.jpg)
![](https://images2017.cnblogs.com/blog/706175/201711/706175-20171102171627248-433720234.jpg)
![](https://images2017.cnblogs.com/blog/706175/201711/706175-20171102171627513-860323763.jpg)
![](https://images2017.cnblogs.com/blog/706175/201711/706175-20171102171627857-1551442879.jpg)
![](https://images2017.cnblogs.com/blog/706175/201711/706175-20171102171628107-748383816.jpg)
![](https://images2017.cnblogs.com/blog/706175/201711/706175-20171102171628388-625735878.jpg)
循环,把list_filter中对应的类所有对象
![](https://images2017.cnblogs.com/blog/706175/201711/706175-20171102171628654-64588005.jpg)
![](https://images2017.cnblogs.com/blog/706175/201711/706175-20171102171628951-2010232478.jpg)
方法二:
![](https://images2017.cnblogs.com/blog/706175/201711/706175-20171102171629154-1981027375.png)
![](https://images2017.cnblogs.com/blog/706175/201711/706175-20171102171629498-1821678968.png)
两方法实际上是一样的,导入方式和使用方式不同:
方法一:
导入:from django.db.models.fields.related import ForeignKey,ManyToManyField
使用:field.rel.to
方法二:
导入:from django.db.models import ForeignKey,ManyToManyField
使用:field.rel.model