ObjectDoesNotExist是django.core.exceptions.ObjectDoesNotExist的异常类,用于捕获单个对象查询时未找到对象的情况。例如: from django.core.exceptions import ObjectDoesNotExist from myapp.models import MyModel try: obj = MyModel.objects.get(id=1) except ObjectDoesNotExist: print("Object does not exist") 复制...
from django.core.exceptions import ObjectDoesNotExist from myapp.models import MyModel try: my_object = MyModel.objects.get(id=1) except ObjectDoesNotExist: print("Object does not exist") 复制代码 在上面的示例中,如果id为1的MyModel对象不存在,则会捕获ObjectDoesNotExist异常,并打印"Object does not ...
So I know that the ids returned from the form are in the database yet I keep getting the error object does not exist. Whats wrong with my code? The stack trace says that the error is happening on: image = Image.objects.get(id=objects) ...
总结:ObjectDoesNotExist 和 DoesNotExist 表达的意思是相同的,只是写法不同,一个需要导入,一个是model的属性,如何使用看大家的个人习惯就好。 补充知识:Django入门:DoesNotExist: User matching query does not exist. 先说说引发该问题的具体代码 User.objects.filter(username=’sss’).get().username 当在py脚本中...
then applying additional migrations. but regardless of how I order app migrations does not change err or allow migration to complete. I have also tried migrations with--fake-initial. it looks like it is calling a site object before creating site model. ...
('object' 表示单数,'objects' 表示 count 不同于1时的所有情况,不论其值如何) 例如: from django.http import HttpResponse from django.utils.translation import ngettext def hello_world(request, count): page = ngettext( 'there is %(count)d object', 'there are %(count)d objects', count, ) ...
Seeget()for further information onObjectDoesNotExistandDoesNotExist. FieldDoesNotExist¶ exceptionFieldDoesNotExist[source]¶ TheFieldDoesNotExistexception is raised by a model’s_meta.get_field()method when the requested field does not exist on the model or on the model’s parents. ...
django 'set' object does not support indexing 在定义Model之后使用syncdb 同步的时候报出这个错误,检查之后发现是用错了。在model的Meta里面,排序这些用的应该是 ordering = ['last','first','middle'] unique_together= ['first','last','middle']...
错误: No module named 模块名称 找不到模块，需要将模块添加到Python的搜索目录中。 方法一、在运行时...
# Choice object, does the INSERT statement, adds the choice to the set # of available choices and returns the new Choice object. Django creates # a set to hold the "other side" of a ForeignKey relation # (e.g. a question's choice) which can be accessed via the API. ...