我不知道如何找到解决方案，但让我们从头开始。
这些是我的模型：
class Animal(models.Model):
SPECIES = (
("DOG", "DOG"),
("CAT", "CAT"),
)
species = models.CharField(max_length=4, choices=SPECIES)
name = models.CharField(max_length=20)
weight = models.PositiveSmallIntegerField(null=False, blank=False)
age = models.PositiveSmallIntegerField(null=False, blank=False)
color = models.CharField(max_length=10)
isill = models.BooleanField(null=False)
isagressive = models.BooleanField(null=False)
isadopted = models.BooleanField(null=False)
isreturned = models.NullBooleanField()
whichbox = models.CharField(max_length=5)
photo = models.ImageField(null=True, blank=True)
def __str__(self):
return self.name
class MedicalHistory(models.Model):
animal = models.ForeignKey(Animal, on_delete=models.CASCADE)
disease = models.CharField(max_length=100)
medicine = models.CharField(max_length=20, null=True, blank=True)
therapy = models.CharField(max_length=50)
howmuchmed = models.CharField(max_length=50)
daterecord = models.DateField
def __str__(self):
return self.disease …