Foreign key from one app into another in Django

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I"m wondering if it"s possible to define a foreign key in a models.py file in Django that is a reference to a table in another app?

In other words, I have two apps, called cf and profiles, and in cf/models.py I have (amongst other things):

class Movie(models.Model):
    title = models.CharField(max_length=255)

and in profiles/models.py I want to have:

class MovieProperty(models.Model):
    movie = models.ForeignKey(Movie)

But I can"t get it to work. I"ve tried:

    movie = models.ForeignKey(cf.Movie)

and I"ve tried importing cf.Movie at the beginning of models.py, but I always get errors, such as:

NameError: name "User" is not defined

Am I breaking the rules by trying to tie two apps together in this way, or have I just got the syntax wrong?

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Foreign key from one app into another in Django __del__: Questions

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5 answers

I would like to know how to put a time delay in a Python script.

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Answer #1

import time
time.sleep(5)   # Delays for 5 seconds. You can also use a float value.

Here is another example where something is run approximately once a minute:

import time
while True:
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    time.sleep(60) # Delay for 1 minute (60 seconds).

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Answer #2

You can use the sleep() function in the time module. It can take a float argument for sub-second resolution.

from time import sleep
sleep(0.1) # Time in seconds

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Path objects from the Python 3.4+ pathlib module also expose these instance methods:

We hope this article has helped you to resolve the problem. Apart from Foreign key from one app into another in Django, check other __del__-related topics.

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Olivia Lehnman

Vigrinia | 2023-03-22

Thanks for explaining! I was stuck with Foreign key from one app into another in Django for some hours, finally got it done 🤗. I am just not quite sure it is the best method

Chen Richtgofen

Milan | 2023-03-22

File handling is always a bit confusing 😭 Foreign key from one app into another in Django is not the only problem I encountered. I just hope that will not emerge anymore

Olivia Richtgofen

California | 2023-03-22

re Python module is always a bit confusing 😭 Foreign key from one app into another in Django is not the only problem I encountered. I am just not quite sure it is the best method

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