What are Django QuerySets and how do I use them?

What are Django QuerySets and how do I use them?

Django QuerySets are a way to retrieve data from your database in a flexible and efficient manner. They allow you to filter, order, and manipulate data easily.

Can you give me an example of a simple QuerySet?

Sure! For example, if you have a model called Book, you can retrieve all books with Book.objects.all().

How do I filter QuerySets?

You can filter QuerySets using the filter() method. For instance, Book.objects.filter(author='John Doe') will return all books by John Doe.

What about ordering the results?

You can order QuerySets using the order_by() method. For example, Book.objects.order_by('title') will order the books by their title.