When overriding save of a model, how to access filefield?

[FireRedDev]

Hey, i am trying to do the following:

class Upload(models.Model):
    upload_file = models.FileField(upload_to='media', blank=True, null=True)
    dataframe_from_transformed_uploadfile = PickledObjectField(blank=True, null=True, editable = False)
    pivoted_dataframe_from_transformed_uploadfile = PickledObjectField(blank=True, null=True, editable = False)
    pivotedlist_dataframe_from_transformed_uploadfile = PickledObjectField(blank=True, null=True, editable = False)
    upload_date = models.DateTimeField(auto_now_add =True)
    order_description = models.TextField(default="")

    def save(self, *args, **kwargs):
        generatereport(self)
        super(Upload, self).save(*args, **kwargs) # Call the "real" save() method.

    
def generatereport(self):
    df = pd.read_excel(os.path.join('media',self.upload_file.name))

However at the read excel part i get:

FileNotFoundError at /report/
[Errno 2] No such file or directory: 'media\\bgbrgbruckleitha_orderlist.xlsx'

If i try it with .path instead of .name i get NotImplementedError at /report/ , probably because its not supported?