Add search form for hidden content

Added search for comments and proposal_notifications, added tsv column
for search and rake tasks to update/create tsv vector.

spec/lib/tasks/db_spec.rb

@@ -0,0 +1,39 @@
+require "rails_helper"
+
+describe "rake db:calculate_tsv" do
+  before { Rake::Task["db:calculate_tsv"].reenable }
+
+  let :run_rake_task do
+    Rake.application.invoke_task("db:calculate_tsv")
+  end
+
+  it "calculates the tsvector for comments, including hidden ones" do
+    comment = create(:comment)
+    hidden = create(:comment, :hidden)
+    comment.update_column(:tsv, nil)
+    hidden.update_column(:tsv, nil)
+
+    expect(comment.reload.tsv).to be nil
+    expect(hidden.reload.tsv).to be nil
+
+    run_rake_task
+
+    expect(comment.reload.tsv).not_to be nil
+    expect(hidden.reload.tsv).not_to be nil
+  end
+
+  it "calculates the tsvector for proposal notifications, including hidden ones" do
+    notification = create(:proposal_notification)
+    hidden = create(:proposal_notification, :hidden)
+    notification.update_column(:tsv, nil)
+    hidden.update_column(:tsv, nil)
+
+    expect(notification.reload.tsv).to be nil
+    expect(hidden.reload.tsv).to be nil
+
+    run_rake_task
+
+    expect(notification.reload.tsv).not_to be nil
+    expect(hidden.reload.tsv).not_to be nil
+  end
+end