update schema

app/models/dynamic_document.rb

@@ -7,8 +7,8 @@
 #  id          :bigint           not null, primary key
 #  body        :text             not null
 #  head        :text
-#  sha1        :text             not null
-#  uuid        :uuid             not null
+#  sha1        :string           not null
+#  uuid        :string           not null
 #  created_at  :datetime         not null
 #  updated_at  :datetime         not null
 #  template_id :bigint           not null