Finish MVP for content editing

app/models/editable_content.rb

@@ -1,4 +1,12 @@
 class EditableContent < ApplicationRecord
   validates :key, presence: true,
-                  uniqueness: { scope: :path }
+                  uniqueness: { scope: :context }
+
+  def has_content?
+    content.present?
+  end
+
+  def is_empty?
+    content.blank?
+  end
 end