Question

我有一个模特：

class Model(models.Model):
    name =

我想为模型对象的每个组合存储一些值。这些值可以及时更改，并且它们不会通过数学函数链接。什么是最聪明的方法呢？

也许我可以使用这个模型：

class Model_Relation(models.Model):
    model1 = models.ForeignKey(Model, null=True, on_delete=models.PROTECT, 
        related_name='model1_relation')
    model2 = models.ForeignKey(Model, null=True, on_delete=models.PROTECT, 
        related_name='model2_relation')
    value1 = models.ForeignKey(Something, to_field='name',
        on_delete=models.PROTECT, default ='something1'
        related_name='...')
    value2 = models.ForeignKey(Anotherthing, to_field='name',
        on_delete=models.PROTECT, default ='anotherthing1'
        related_name='...')
    value3 = ...

    class Meta:
        unique_together = ("model1", "model2")

但写下所有的关系很长......

它可以帮助我在populate_script上设置默认值

for m1 in model.all():
    for m2 in model.all():
        m1.name_m2.name = add_model_relation(m1, m2, 'something1', 
            'anotherthing1', '...')

然后只在必要的地方进行更改，但无论如何都需要很长时间......

也许最好为模特添加一些字段或......我不知道......有什么建议吗？

编辑：使用直通字段：

class Model(models.Model):
    name = models.CharField(max_length=32, unique=True)
    relations = models.ManyToManyField('self', 
        related_name='...', through='Model_Relation')

class Model_Relation(models.Model):
    model1 = models.ForeignKey(Model, null=True, on_delete=models.PROTECT, 
        related_name='model1_relation')
    model2 = models.ForeignKey(Model, null=True, on_delete=models.PROTECT, 
        related_name='model2_relation')
    value1 = models.ForeignKey(Something, to_field='name',
        on_delete=models.PROTECT, default ='something1'
        related_name='...')
    value2 = models.ForeignKey(Anotherthing, to_field='name',
        on_delete=models.PROTECT, default ='anotherthing1'
        related_name='...')
    value3 = ...

    class Meta:
        unique_together = ("model1", "model2")

做三个m2m，每个值加一个？因此，只有在必要时才能确定关系

建立关系矩阵并填充它

0 个答案: