What is ActiveRecord indexing in Rails?

What is ActiveRecord indexing in Rails?

ActiveRecord indexing in Rails refers to the use of database indexes to improve query performance. By creating indexes on specific columns, you can speed up data retrieval operations.

How do I create an index in a Rails migration?

You can create an index in a Rails migration using the add_index method. For example: add_index :table_name, :column_name.

Are there any downsides to using too many indexes?

Yes, while indexes can speed up read operations, they can slow down write operations because the index needs to be updated whenever data is modified.

What are some best practices for indexing in Rails?

Some best practices include indexing columns that are frequently queried, avoiding over-indexing, and regularly monitoring query performance.