python之类型对象 'X' 没有属性 'DoesNotExist' 与 django

我一直收到 has no attribute DoesNotExist 错误。

有什么想法吗？

到目前为止我试过:

    try: 
        current_report = Report.objects.get(account_profile=current_profile) 
    except Report.DoesNotExist: 
        print("report doesn't exist") 
        current_report=None 

我的调试显示类型对象“Report”没有属性“DoesNotExist” 在 current_report(etc) 行:

我也试过:

from django.core.exceptions import ObjectDoesNotExist 
... 
except Report.ObjectDoesNotExist:  

和

try: 
    Report.objects.get(account_profile=current_profile) 
except Report.DoesNotExist: 
    print("report doesn't exist") 
    current_report=None 

和

try: 
    Report.objects.get(account_profile=current_profile) 
except ObjectDoesNotExist: 
    print("report doesn't exist") 
    current_report=None 

为什么类型对象“X”没有属性“DoesNotExist”？我正在使用 Django。

在我的 Models.py 中我有:

class Report(models.Model): 
    account_profile = models.ForeignKey(Profile) 
    total_visitors = models.CharField(max_length=200, blank=True, null=True) 
    last_week_visitors = models.CharField(max_length=200, blank=True, null=True) 
    new_visitors_this_wk = models.CharField(max_length=200, blank=True, null=True) 
    new_visitors_last_wk = models.CharField(max_length=200, blank=True, null=True) 
    bounce_rate = models.CharField(max_length=200, blank=True, null=True) 
    last_week_bounce_rate = models.CharField(max_length=200, blank=True, null=True) 
    percent_new_referrals = models.CharField(max_length=100, blank=True, null=True) 
    last_week_new_referrals = models.CharField(max_length=100, blank=True, null=True) 
    this_week_pg_load_time = models.CharField(max_length=100, blank=True, null=True) 
    last_week_pg_load_time = models.CharField(max_length=100, blank=True, null=True) 
    date_created = models.DateTimeField(default=datetime.now, blank=True) 
    week_number = models.CharField(max_length=10, blank=True, null=True) 
 
    #HTML table for browsers with avg session durations less than 10 seconds 
    sessions_vs_browser = models.TextField(blank=True, null=True) 
    sessions_vs_country = models.TextField(blank=True, null=True) 
    sessions_vs_device = models.TextField(blank=True, null=True) 
    total_sessions = models.CharField(max_length=100, blank=True, null=True) 
    keywords = models.ManyToManyField(Keyword) 
    referrals = models.ManyToManyField(Referral) 
    pages_speeds = models.ManyToManyField(PageSpeed) 
    bounces = models.ManyToManyField(BouncePage) 

请您参考如下方法:

导入异常，

from django.core.exceptions import ObjectDoesNotExist 

捕获它

try: 
    Report.objects.get(account_profile=current_profile) 
except ObjectDoesNotExist: 
    print("report doesn't exist") 
    current_report=None 

因为 ObjectDoesNotExist 是 Django 特有的异常，您必须导入它才能捕获它。

此外，执行 Model.ObjectDoesNotExist 也不是模型的属性