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Using a mutiple collection select form helper with habtm or has many associations in Rails (See related posts)

// where user has and belongs to many roles

# in your view
<%= collection_select :user, :role_ids, Role.find(:all, :order => 'name ASC'), :id, :name, { :selected => @user.role_ids }, { :multiple => true, :name => 'user[role_ids][]' } -%>
to rails form habtm select collection view association has_many by davenolan on Mon Jul 30 04:58:54 -0400 2007

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