Enforce unique constraint on a field For a content type (place), on creation, as the user is entering the name field, I would like to check the previous records for that field. If there is a match, I will present it to the user to prevent duplicate entries. is there way to do this?
Check out the Unique field module.


  This module performs additional validation when a node is created or updated by a user to require that a node's title, author, language, and CCK fields are unique within a given context.