Storing Files on Model Instances

So far, we have manually managed the uploading and saving of files. You can also associate a file with a model instance by assigning the path to which it was saved to a CharField. However, as with much of Django, this capability (and more) is already provided with the models.FileField class. FileField instances do not actually store the file data; instead, they store the path where the file is stored (like a CharField would), but they also provide helper methods. These methods assist with loading files (so you do not have to manually open them) and generating disk paths for you based on the ID of the instance (or other attributes).

FileField can accept two specific optional arguments in its constructor (as well as the base Field arguments, such as required, unique, help_text, and so on):

• max_length: Like max_length in the form's ImageField, this is the maximum length of the filename that is allowed.
• upload_to: The upload_to argument...