Django的存储模型

Question

值如何我在data领域使用id_logs model从information model

# Create your models here. 
class information(models.Model): 
    id_=models.CharField(max_length=50) 
    modelno=models.CharField(max_length=50) 

    def __str__(self): 
     return self.id_ 

class logs(models.Model): 
    info=models.ForeignKey(information, on_delete=models.CASCADE) 
    data = models.TextField(blank=True, null=True) 
    updated = models.DateTimeField(auto_now=True) 

我试过，但失败

try: 
obj=information.objects.get(id_=21) #21 is example id 
obj.logs.create(data=5000) #need to store 5000 
except: 
print("exception")    #always throwing exception not saving 

Answer 1

使用

obj.logs_set.create(data=5000) 

或者你储存值应该定义related_name田间信息一样，

info=models.ForeignKey(information, on_delete=models.CASCADE,related_name="logs") 

那么你可以使用像

obj.logs.create(data=5000)