So I've been going through a lot of rails tutorial, and I get that the default for adding a new column to a database is , for example, 

```
rails generate migration add_reset_to_users reset_digest:string reset_sent_at:datetime

```

The above will add a reset\_digest in the form of a string and reset\_sent\_at in the form of a date to the migration add\_reset\_to\_users

My questions is what if I am clumsy one night at 4 AM and only call the following

```
rails generate migration add_reset_to_users reset_digest:string

```

I completely forgot about reset\_sent\_at but want to implement it the next morning. I made the mistake of adding the link directly to the db file, which was a huge mistake. 

In this case what should I do? Do I simply call a new migration such as

```
rails generate migration add_reset_sent_to_users reset_sent_at:datetime

```

or is there an even better way?