Why is Django unable to run properly?-CodePudding

I am recently working on Django following the description from the book Python Crash Course. I followed every step and tried to restart from the beginning a couple of times, still unable to solve the problem(Even reinstalled MacOS to get a cleaner desktop). Here is my code:


class Topic(models.Model):
    '''A topic the user is learning about'''
    text = models.CharField(max_length=200)
    date_added = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        '''Return a string represent model'''
        return self.text

The tracebacks are below:

Traceback (most recent call last):
  File "/Users/bryan/Desktop/python/learning_log/learning_logs/models.py", line 3, in <module>
    class Topic(models.Model):
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/django/db/models/base.py", line 108, in __new__
    app_config = apps.get_containing_app_config(module)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/django/apps/registry.py", line 253, in get_containing_app_config
    self.check_apps_ready()
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/django/apps/registry.py", line 135, in check_apps_ready
    settings.INSTALLED_APPS
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/django/conf/__init__.py", line 82, in __getattr__
    self._setup(name)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/django/conf/__init__.py", line 63, in _setup
    raise ImproperlyConfigured(
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.
[Finished in 304ms with exit code 1]
[cmd: ['python3', '-u', '/Users/bryan/Desktop/python/learning_log/learning_logs/models.py']]
[dir: /Users/bryan/Desktop/python/learning_log/learning_logs]
[path: /Library/Frameworks/Python.framework/Versions/3.10/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin]

Edit: The code is in the file models.py

CodePudding user response：

There is small mistake you are trying to access the text in __str__ method and due to which it failed in order to access the text you need to change the code like self.text

def __str__(self):
    '''Return a string represent model'''
    return self.text

CodePudding user response：

It seems like the error is happening because you're running the models.py file directly. In working with Django, you rarely run a .py file directly. Usually you run some commands in the terminal, and then you interact with your project in a browser.

Are you working in an active virtual environment?
Have you run the makemigrations command for your app?
Have you run python manage.py migrate?
What happens when you run python manage.py runserver?