Set already set pronouns to sticky

Test plan:
-migrations run

Fixes KNO-476

flag=account_pronouns

Change-Id: I95fcb90b891cc20be6f3de1e88a138ee2007a3bd
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/236947
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Rob Orton <rob@instructure.com>
QA-Review: Rob Orton <rob@instructure.com>
Product-Review: Rob Orton <rob@instructure.com>

db/migrate/20200511171508_make_existing_pronoun_fields_sticky.rb

@@ -0,0 +1,33 @@
+#
+# Copyright (C) 2020 - present Instructure, Inc.
+#
+# This file is part of Canvas.
+#
+# Canvas is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the Free
+# Software Foundation, version 3 of the License.
+#
+# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along
+# with this program. If not, see <http://www.gnu.org/licenses/>.
+
+class MakeExistingPronounFieldsSticky < ActiveRecord::Migration[5.2]
+  tag :postdeploy
+  disable_ddl_transaction!
+
+  def up
+    User.where.not(pronouns: nil).find_each do |u|
+      u.add_sis_stickiness(:pronouns)
+      u.set_sis_stickiness
+      User.where(id: u).update_all(stuck_sis_fields: u.stuck_sis_fields)
+    end
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
+end

spec/migrations/make_existing_pronoun_fields_sticky_spec.rb

@@ -0,0 +1,46 @@
+#
+# Copyright (C) 2020 - present Instructure, Inc.
+#
+# This file is part of Canvas.
+#
+# Canvas is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the Free
+# Software Foundation, version 3 of the License.
+#
+# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along
+# with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+require_relative "../spec_helper"
+require 'db/migrate/20200511171508_make_existing_pronoun_fields_sticky.rb'
+
+describe 'MakeExistingPronounFieldsSticky' do
+  describe "up" do
+    it "sets already set pronoun field as a sticky field" do
+        u = User.create!(pronouns: 'she/her')
+        User.where(id: u).update_all(stuck_sis_fields: nil)
+        MakeExistingPronounFieldsSticky.up
+        expect(u.stuck_sis_fields.to_a.join(',')).to eq 'name,sortable_name,pronouns'
+    end
+
+    it "doesn't change a non-set pronoun field as a sticky field" do
+        u = User.create!
+        expect(u.stuck_sis_fields.to_a.join(',')).to eq 'name,sortable_name'
+        MakeExistingPronounFieldsSticky.up
+        expect(u.stuck_sis_fields.to_a.join(',')).to eq 'name,sortable_name'
+    end
+
+    it "doesn't affect other set sticky fields" do
+        u = User.create!(name: 'John Doe')
+        expect(u.stuck_sis_fields.to_a.join(',')).to eq 'name,sortable_name'
+        u.update(pronouns: 'she/her')
+        MakeExistingPronounFieldsSticky.up
+        expect(u.stuck_sis_fields.to_a.join(',')).to eq 'name,sortable_name,pronouns'
+    end
+  end
+end