How do I change a column type in a Rails migration?

How do I change a column type in a Rails migration?

You can change a column type in a Rails migration using the change_column method. For example: change_column :table_name, :column_name, :new_type.

Can you give me an example of changing a string to an integer?

Sure! If you want to change a column named age from string to integer, you would write: change_column :users, :age, :integer.

What if I need to change multiple columns at once?

You can use multiple change_column calls within the same migration. Just list them one after the other in the change method.

Is there a way to rollback this change?

Yes! You can define a down method in your migration to revert the changes, or use change which automatically handles it.