diff --git a/app/models/studium.rb b/app/models/studium.rb
index 7411b30..d67e8a6 100755
--- a/app/models/studium.rb
+++ b/app/models/studium.rb
@@ -1,6 +1,9 @@
 class Studium < ActiveRecord::Base
   attr_accessible :desc, :name, :typ, :zahl
   has_many :modulgruppen, inverse_of: :studium, :class_name => "Modulgruppe"
-  validates :zahl, :uniqueness => true
+  
+  validates :typ, :inclusion => {:in => ["Bachelor","Master"] }
+  validates :name, :uniqueness => true, :presence=>true
+  validates :zahl, :uniqueness => true, :presence=>true
   translates :desc,:shortdesc, :versioning =>true,:fallbacks_for_empty_translations => true
 end