How do I remove an index in a Rails migration?

How do I remove an index in a Rails migration?

To remove an index in a Rails migration, you can use the remove_index method. For example: remove_index :table_name, :column_name.

Can I remove multiple indexes at once?

Yes, you can remove multiple indexes by calling remove_index multiple times or by using the remove_indexes method if you have a list of indexes.

What if I don't remember the index name?

If you don't remember the index name, you can check the schema file or use the ActiveRecord::Base.connection.indexes(:table_name) method to list all indexes.

Is there a way to check if an index exists before removing it?

Yes, you can use if index_exists?(:table_name, :column_name) to check if the index exists before attempting to remove it.