extract email assets

app/models/email_message_asset.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: email_message_assets
+#
+#  id         :bigint           not null, primary key
+#  data       :text             not null
+#  sha1       :string           not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#  account_id :bigint           not null
+#
+# Indexes
+#
+#  index_email_message_assets_on_account_id_and_sha1  (account_id,sha1) UNIQUE
+#
+# Foreign Keys
+#
+#  fk_rails_...  (account_id => accounts.id)
+#
+class EmailMessageAsset < ApplicationRecord
+  belongs_to :account
+
+  before_validation :set_sha1, on: :create
+
+  def set_sha1
+    self.sha1 = Digest::SHA1.hexdigest(data.to_s)
+  end
+end