Use NumberType rather than DecimalColumn in cookbook
Use NumberType rather than DecimalColumn in cookbook

Computer takes a ColumnType instance, not a Column object.
captainsafia/agate,flother/agate,onyxfish/agate,wireservice/agate,JoeGermuska/agate,dwillis/agate,eads/journalism,TylerFisher/agate,onyxfish/journalism