1. 解释“django matching query does not exist”错误的含义 “django matching query does not exist”错误通常发生在Django框架中,当你尝试查询数据库时,但没有找到任何匹配指定条件的记录。这通常会导致DoesNotExist异常被抛出。这个错误表明你的查询条件没有返回任何结果,而你的代码没有正确处理这种情况。 2. 可能...
在或者geattr / hasattr / obj. item 会抛出异常 无法通过判断处理 捕获异常 try: tmp_data['demand_dept_name'] = data.demand_dept.name exceptException: pass
某天,运行django项目,报错: (1449, "The user specified as a definer ('mysql.infoschema'@'localhost') does not exist") 解决方案 原理:给 mysql.infoschema 用户添加权限 具体步骤: 依次执行命令: create user 'mysql.infoschema'@'%' identified by '密码'; grant all privileges on *.* to 'mysql.inf...
File "django\utils\autoreload.py", line 256, in restart_with_reloader File "django\utils\autoreload.py", line 243, in get_child_arguments RuntimeError: Script runserver does not exist. [7964] Failed to execute script manage 解决方案: ...
django之异常错误3(Student matching query does not exist.) 错误提示: DoesNotExist at /blog/test2/ Student matching query does not exist. 说明:错误提示说明错误在test2中,查找数据库的表student的数据不存在,可能是索引存在错误,超过了取值的范围。 无语言基础,自学python所做的各种笔记,欢迎大牛指点....
As I said above, If I split files into two or removeAddFieldorRenameModel-- exception is gone. Problem not reproduced withCharField, but reproduced withForeignKey. models.py: from django.db import models class NewModel(models.Model): name = models.SlugField(max_length=100, null=True) ...
line 1502, in add_q clause, _ = self._add_q(q_object, self.used_aliases) File "/home/vboxuser/Desktop/django/lib/python3.8/site-packages/django/db/models/sql/query.py", line 1533, in _add_q child_clause, needed_inner = self.build_filter( File "/home/vboxuser/Desktop/django/lib...
psycopg2.errors.UndefinedTable: relation "sso_server_consumer" does not exist -- this is the error I am getting as soon as I run the above code in django shell. Can someone please help me on how to solve this error? I have run both makemigrations and migrate commands. But, still getting...
ForemanTasks::TaskError: Task xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx: Katello::Errors::Pulp3Error: cursor "_django_curs_140591872157504_1" does not exist /opt/theforeman/tfm/root/usr/share/gems/gems/katello-3.18.1.55/lib/katello/tasks/pulp3_migration.rake:43:in `block (2 levels) in <top (...
1.django的get方法是从数据库的取得一个匹配的结果,返回一个对象,如果记录不存在的话,它会报错。 3.django的filter方法是从数据库的取得匹配的结果,返回一个对象列表,如果记录不存在的话,它会返回[]。 4.如果你用django的get去取得关联表的数据的话,无论关联表有多少记录的都不会报错。