transferred Code Ocean from original repository to GitHub

app/models/concerns/context.rb

@@ -0,0 +1,20 @@
+module Context
+  extend ActiveSupport::Concern
+
+  included do
+    has_many :files, as: :context, class: CodeOcean::File
+    accepts_nested_attributes_for :files
+  end
+
+  def add_file(file_attributes)
+    file = files.create(file_attributes)
+    save
+    file
+  end
+
+  def add_file!(file_attributes)
+    file = files.create!(file_attributes)
+    save!
+    file
+  end
+end