在 Django 过滤器中加入两个模型

Question

I might be stupid for not finding the right keywords to look for, but here's the actual problem:
I'm trying to select database values by joining two different models in Django .
Consider the following models.py :

class Token(models.Model):
    userid = models.TextField()
    access_token = models.TextField()
    refresh_token = models.TextField(default='None', null=True)

class File(models.Model):
    userid = models.ForeignKey(Token, on_delete=models.CASCADE)
    name = models.TextField()
    link = models.TextField()
    size = models.BigIntegerField()

I'd now like to have all files from File with their corresponding access_token and userid .
I tried to do the following:

data = File.objects.filter(name__startswith='Dummystring')

How to obtain the access_token in this scenario?

Answer 1

Use values or values_list to join the tables and get the values. Use __ to do field lookups :

data = File.objects.filter(name__startswith='Dummystring') \
                   .values_list('userid__access_token', 'userid__userid')