I have a simple MySQL table with one column: name.

I would like to define a unique constraint on this column.

I can do:

class MyModel < ActiveRecord::Base
  validates_uniqueness_of :my_column_name
end

but it will work only at the application level, not at the database level.

What would you suggest ?

mysql ruby-on-rails ruby-on-rails-3 unique unique-constraint
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