How can I handle errors during Rails migrations?

How can I handle errors during Rails migrations?

You can handle errors in Rails migrations by using the rescue block to catch exceptions and log them.

Can you give me an example of using rescue in a migration?

Sure! You can wrap your migration code in a begin...rescue block like this:

class AddColumnToUsers < ActiveRecord::Migration[6.0]
  def change
    begin
      add_column :users, :new_column, :string
    rescue ActiveRecord::StatementInvalid => e
      Rails.logger.error "Migration failed: \\#{e.message}"
    end
  end
end

What should I do if a migration fails?

If a migration fails, you can roll back the migration using rails db:rollback and fix the issue before trying again.

Are there any tools to help with migration error handling?

Yes, tools like ActiveRecord::Migration provide methods to manage migrations, and gems like better_errors can help debug issues.