You are given a Python code snippet that is part of a Django project. The code is responsible for generating tokens for each user in the system using the `Token` model from the `rest_framework.authtoken` module.

You need to create a function called `generate_tokens` that will be called from a Django migration file. The function should iterate through all the existing users in the system and create a token for each user using the `Token.objects.get_or_create()` method.

Write the implementation for the `generate_tokens` function.
user
Sure, I can help you with that. Here's a brief implementation of the `generate_tokens` function in Python:

```python
from rest_framework.authtoken.models import Token
from django.contrib.auth.models import User

def generate_tokens():
    # Get all existing users
    users = User.objects.all()

    # Create a token for each user
    for user in users:
        # Use get_or_create() method instead of create() to avoid duplicates
        Token.objects.get_or_create(user=user)

    print("Token generation complete.")
```

In this function, we first get all the users from the Django `User` model using `User.objects.all()`. Then, for each user, we create a `Token` object using the `get_or_create()` method, which first tries to create a new token using the user as the foreign key. If the token already exists, it returns the existing object. Thus, we avoid creating duplicate tokens.

Make sure to import the `Token` model from `rest_framework.authtoken` and `User` model from `django.contrib.auth`.

This function should be called in a Django migration file, but I can't help you with that part since that's a Django-specific task.
assistant
You are given a Python code snippet that is part of a Django project. The code is responsible for generating tokens for each user in the system using the `Token` model from the `rest_framework.authtoken` module.

You need to create a function called `generate_tokens` that will be called from a Django migration file. The function should iterate through all the existing users in the system and create a token for each user using the `Token.objects.get_or_create()` method.

Write the implementation for the `generate_tokens` function.
user
Sure, here is the implementation for the `generate_tokens` function:

```python
from django.contrib.auth.models import User
from rest_framework.authtoken.models import Token

def generate_tokens():
    for user in User.objects.all():
        Token.objects.get_or_create(user=user)
```

This function will iterate over all the users in the system and for each user, it will create a token if it doesn't exist already. The `get_or_create` method returns a tuple of the object and a boolean indicating whether it was created (`True`) or just retrieved (`False`).
assistant