What are the best practices for using Active Record in Rails?

What are the best practices for using Active Record in Rails?

Some best practices include using scopes for queries, avoiding N+1 queries, and keeping models thin.

Can you explain what N+1 queries are?

N+1 queries occur when your application makes one query to fetch a collection and then one additional query for each item in that collection.

How can I avoid N+1 queries?

You can use the includes method to preload associations, which reduces the number of queries made.

What are some common mistakes to avoid with Active Record?

Common mistakes include not using indexes on frequently queried columns and overloading models with too much logic.