Five Common Rails Mistakes

<i>Without schema constraints, your data will slowly corrode due to bugs in your codebase until you can’t depend on any fields being populated.</i><p>Don't tell that to the NoSQL people.<p><i>use :limit =&#62; N to size your string columns appropriately. Strings default to 255 characters and phone probably doesn’t need to be that big, does it?</i><p>Is this a Rails limitation? A lot of DBs, like Postgres, treat all strings as varchar anyway.

I'm interested in point 4: use SQL. Is there a way of doing a find that only returns the primary key value and then do a delete only based on this value <i>without</i> using SQL and only via Active Record?

Is Rails as prevalent as it once was, or has something emerged to overtake it for whatever it is that Rails excels at?

Forgot 6: Using Rails.