Introducing Semesters

app/models/semester.rb

@@ -1,3 +1,4 @@
+
 # == Schema Information
 #
 # Table name: semesters
@@ -12,6 +13,37 @@
 #
 
 class Semester < ActiveRecord::Base
+  attr_accessible :name, :nummer, :ssws, :lva_ids
   has_and_belongs_to_many :lvas
-  attr_accessible :name, :nummer, :ss, :ws
+  belongs_to :studium, :foreign_key => "studium_id"
+  validates :name, :presence => true
+  validates :nummer, :presence => true
+  validates :ssws, :presence => true
+  class << self
+    def batch_add(name, type, target)
+      if type == "Bachelor"
+        length = 6
+      else
+        length = 4
+      end
+      for i in 1..length
+        semester =Semester.new()
+        semester.name = i.to_s + ". " + name
+        semester.nummer = i
+        if i % 2 == 0
+          semester.ssws = "SS"
+        else
+          semester.ssws = "WS"
+        end
+        semester.save
+        target << semester
+      end
+    end
+
+    def batch_destroy(studium)
+      for m in studium.semester
+        m.destroy
+      end
+    end
+  end
 end