Fix migrations and update schema

db/migrate/20090907095812_canonical.rb

@@ -1,9 +1,9 @@
 class Canonical< ActiveRecord::Migration
 	def self.up
 		add_column :wiki_pages, :canonical_title, :string
-		WikiPage.find(:all).each do |wiki|
-			wiki.update_attribute(:canonical_title, wiki.title.pretty_url)
-		end
+		#WikiPage.find(:all).each do |wiki|
+		#	wiki.update_attribute(:canonical_title, wiki.title.pretty_url)
+		#end
 	end
 
 	def self.down

db/migrate/20150906010325_add_not_null.rb

@@ -0,0 +1,38 @@
+class AddNotNull < ActiveRecord::Migration
+  def up
+    change_column_null :courses, :period, false, "0000.0"
+
+    change_column_null :wiki_pages, :canonical_title, false, ""
+    change_column_null :wiki_pages, :position, false, 0
+    change_column_null :wiki_pages, :created_at, false, Time.now
+    change_column_null :wiki_pages, :updated_at, false, Time.now
+
+    change_column_null :wiki_page_versions, :wiki_page_id, false, WikiPage.first.id
+    change_column_null :wiki_page_versions, :version, false, 1
+    change_column_null :wiki_page_versions, :course_id, false, Course.first.id
+    change_column_null :wiki_page_versions, :user_id, false, User.first.id
+    change_column_null :wiki_page_versions, :description, false, ''
+    change_column_null :wiki_page_versions, :title, false, ''
+    change_column_null :wiki_page_versions, :content, false, ''
+    change_column_null :wiki_page_versions, :created_at, false, Time.now
+    change_column_null :wiki_page_versions, :updated_at, false, Time.now
+    change_column_null :wiki_page_versions, :position, false, 0
+
+    WikiPage.with_deleted.where(canonical_title: '').each do |wp|
+      wp.update_attribute(:canonical_title, wp.title.pretty_url)
+    end
+
+  end
+
+  def down
+    change_column_null :courses, :period, true
+
+    change_column_null :wiki_pages, :canonical_title, true
+    change_column_null :wiki_pages, :position, true
+    change_column_null :wiki_pages, :created_at, true
+    change_column_null :wiki_pages, :updated_at, true
+
+    change_column_null :wiki_page_versions, :created_at, true
+    change_column_null :wiki_page_versions, :updated_at, true
+  end
+end

db/migrate/20150906014206_remove_unversioned_field.rb

@@ -0,0 +1,8 @@
+class RemoveUnversionedField < ActiveRecord::Migration
+  def up
+    remove_column :wiki_page_versions, :position
+  end
+
+  def down
+  end
+end