Description: Prefetch Related is a method in Django that optimizes database queries by preloading related objects. This approach is particularly useful in applications that handle relationships between models, such as one-to-many or many-to-many. By using Prefetch Related, Django performs a single query to fetch the main set of objects while simultaneously loading related objects in a second query, significantly reducing the total number of database queries. This is crucial for improving application performance, as it avoids the well-known ‘N+1 queries’ problem, where multiple unnecessary queries are made when accessing related data. Prefetch Related is easy to implement and can be used in conjunction with other query optimizations, such as Select Related, allowing developers to create more efficient and faster applications. In summary, this method not only enhances application speed but also optimizes resource usage on the database server, which is essential in high-traffic production environments.
