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ruby on rails - activerecord find all NOT included in an array

I have an array of team names from another part of code and I want to find all the Teams not in that array. I've tried the following and it doesn't work.

@team_exclude_list = ['Team 1', 'Team 2', 'Team 3']
@teams = Team.where("name != ?", @team_exclude_list)

This is in Rails 3 and the Googles aren't giving me much love.

question from:https://stackoverflow.com/questions/4327202/activerecord-find-all-not-included-in-an-array

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I've never done this with a string field, but perhaps this will work:

@teams = Team.where("name NOT IN (?)", @team_exclude_list)

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