LAPTOP i7

Django Reminder Delete File when deleting object

For Django FileField objects and object of its subclasses, when using the objects delete() method, it will only delete the object record from the database, the file will remain in the appointed location in your servers filesystem.

After a few research, it is a deliberate design in Django to prevent unwanted mess in database when rolling back an record (not sure how this is doable though, leave comments if you know how :D).

So, we have to explicitly delete the file from the filesystem ourselves using

FileFieldObject.file_field.storage.delete(filepath)

A simple implementation to delete the file when delete the file object from db would be like this:

f = FileFieldObject #replace with your models .objects.get() here

storage = f.file_field.storage

#field_field is the property in your model which is an object of class model.FileField

path = f.field_field.path

storage.delete(path) #delete file from disk
f.delete() #delete record from db

Detect when a user stops typing with jQuery

When writing forms I frequently find I need to do some of my validation server side(for example checking if a username is already taken) but want to have a responsive real-time field validation displayed to the user. Obviously this effect can be achieved using AJAX but if you want to validate while the user is typing sending an AJAX request on every keypress is a very inefficient way of doing things. It seems to me that a "onInputFinished" event is needed so that you can detect and take action when a user stops typing in an input field.