与我提出的问题类似,如果我想列出模型中的所有外键关系,是否有方法自动检测这些关系(向前和向后)?
具体来说,如果模型1显示

class Mdl_one(models.Model):
    name = models.CharField(max_length=30)

模型2显示
class Mdl_two(models.Model):
    mdl_one = models.ForeignKey(Mdl_one)
    name = models.CharField(max_length=30)

有没有什么meta命令可以从mdlOne运行(比如Model_one().meta.one_to_many)来告诉我mdl2与它有一对多的外键关系?简单地说,mdl1和mdl2是可以连接的,不一定有任何两个对象是实际的吗?

最佳答案

这是你要找的:

yourModel._meta.get_all_related_objects()

示例(编辑):
class Alumne(models.Model):
    id_alumne = models.AutoField(primary_key=True)
    grup = models.ForeignKey(Grup, db_column='id_grup')
    nom_alumne = models.CharField("Nom",max_length=240)
    cognom1alumne = models.CharField("Cognom1",max_length=240)
    cognom2alumne = models.CharField("Cognom2",max_length=240, blank=True)
    ...

class Expulsio(models.Model):                             <---!
    alumne = models.ForeignKey(Alumne, db_column='id_alumne')
    dia_expulsio = models.DateField(blank=True)
    ...


>>> from alumnes.models import Alumne as A
>>> for x in A._meta.get_all_related_objects():
...     print x.name
...
horaris:alumneexclosdelhorari
presencia:controlassitencia
incidencies:entrevista
incidencies:expulsio                                      <---!
incidencies:incidencia
incidencies:incidenciadaula
seguimentTutorial:seguimenttutorial

10-08 00:44