#306

backend/app/models/material.rb

@@ -1,6 +1,9 @@
 class Material < ApplicationRecord
   include MyDiscard
 
+  SOURCE_KINDS = ['uri', 'google_drive_path', 'google_drive_file',
+                  'legacy_drive_path'].freeze
+
   default_scope -> { kept }
 
   belongs_to :parent, class_name: 'Material', optional: true
@@ -20,7 +23,7 @@ class Material < ApplicationRecord
 
   validates :tag_id, uniqueness: true, allow_nil: true
   validates :source_kind,
-            inclusion: { in: MaterialSyncSuppression::SOURCE_KINDS },
+            inclusion: { in: SOURCE_KINDS },
             allow_blank: true
 
   validate :file_must_be_attached