Initial commit

app/models/import.rb

@@ -0,0 +1,10 @@
+class Import < ApplicationRecord
+  belongs_to :project
+  belongs_to :releasable, polymorphic: true, optional: true
+
+  enum status: %i[ pending started finished failed ]
+
+  has_one_attached :file
+
+  validates :file, content_type: ["application/pdf"]
+end