django.core.exceptions.ImproperlyConfigured: Requested setting INSTALLED_APPS

￡神魔★判官ぃ 2022-04-10 06:49 490阅读 0赞

1、错误描述

E:\PycharmProjects\cdk\venv\Scripts\python.exe E:/PycharmProjects/cdk/venv/diango/a10.py
    Traceback (most recent call last):
      File "E:/PycharmProjects/cdk/venv/diango/a10.py", line 3, in <module>
        class User(models.Model):
      File "E:\PycharmProjects\cdk\venv\lib\site-packages\django\db\models\base.py", line 87, in __new__
        app_config = apps.get_containing_app_config(module)
      File "E:\PycharmProjects\cdk\venv\lib\site-packages\django\apps\registry.py", line 249, in get_containing_app_config
        self.check_apps_ready()
      File "E:\PycharmProjects\cdk\venv\lib\site-packages\django\apps\registry.py", line 131, in check_apps_ready
        settings.INSTALLED_APPS
      File "E:\PycharmProjects\cdk\venv\lib\site-packages\django\conf\__init__.py", line 57, in __getattr__
        self._setup(name)
      File "E:\PycharmProjects\cdk\venv\lib\site-packages\django\conf\__init__.py", line 42, in _setup
        % (desc, ENVIRONMENT_VARIABLE))
    django.core.exceptions.ImproperlyConfigured: Requested setting INSTALLED_APPS, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.
    
    Process finished with exit code 1

2、错误原因

from django.db import models;
    
    class User(models.Model):
        full_name = models.CharField(max_length=100);
    
        def __str__(self):
            return self.full_name;
    
    class Student(models.Model):
        name = models.CharField(max_length=20);
        sex = models.CharField(max_length=2);
        age = models.IntegerField(max_length=2);
        user = models.ForeignKey(User,on_delete=models.CASCADE);
    
        def __str__(self):
            return self.name + ' ' + self.sex + ' ' + self.age;
    
    stu = Student();
    print(stu);

3、解决办法