What is the difference between eager loading and lazy loading in Rails?

What is the difference between eager loading and lazy loading in Rails?

Eager loading loads all associated records at once, while lazy loading loads them only when accessed. This can impact performance.

Can you give me an example of when to use eager loading?

Sure! Use eager loading when you know you'll need associated records, like displaying a list of authors with their books.

What are the performance implications of using lazy loading?

Lazy loading can lead to N+1 query problems, where multiple queries are made, slowing down performance.

How can I implement eager loading in my Rails app?

You can implement eager loading using the includes method in your queries, like Post.includes(:comments).all.