Change file name before saving file in Django

Question

I have the following code to rename my files when loading in django admin (in models.py)

def get_file_path(instance, filename):
    ext = filename.split('.')[-1]
    filename = "%s.%s" % (uuid.uuid4(), ext)
    return os.path.join('directory/', filename)

class Archivo(models.Model):
    archivo = models.FileField(upload_to = get_file_path)

This works for me, but I want to dynamically transfer the directory, something like this:

def get_file_path(instance, filename, directory_string_var):
    ext = filename.split('.')[-1]
    filename = "%s.%s" % (uuid.uuid4(), ext)
    return os.path.join(directory_string_var, filename)

If I do this, I cannot pass the directory parameter (variable) to the method in the upload_to option of the "archivo" field.

Answer 1

- ( , ), upload_to strftime, / .

archivo = models.FileField(upload_to = 'path/%Y/%M/%D/')

:

def get_file_path(instance, filename):
    ext = filename.split('.')[-1]
    filename = "%s.%s" % (uuid.uuid4(), ext)
    return os.path.join(instance.directory_string_var, filename)

class Archivo(models.Model):
    archivo = models.FileField(upload_to = get_file_path)
    directory_string_var = 'default_directory_string_var'