Rename `author_email` field to `author_identifier`

app/controllers/ajax/question_controller.rb

@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
+require "digest"
 require "errors"
 
 class Ajax::QuestionController < AjaxController
@@ -36,6 +37,7 @@ class Ajax::QuestionController < AjaxController
     begin
       question = Question.create!(content:             params[:question],
                                   author_is_anonymous: is_never_anonymous ? false : params[:anonymousQuestion],
+                                  author_identifier:   Digest::SHA2.new(512).hexdigest(Rails.application.secret_key_base + request.ip),
                                   user:                current_user,
                                   direct:              params[:rcpt] != 'followers')
     rescue ActiveRecord::RecordInvalid => e

db/migrate/20220613221551_rename_author_email_to_author_identifier.rb

@@ -0,0 +1,5 @@
+class RenameAuthorEmailToAuthorIdentifier < ActiveRecord::Migration[6.1]
+  def change
+    rename_column :questions, :author_email, :author_identifier
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2022_04_15_193829) do
+ActiveRecord::Schema.define(version: 2022_06_13_221551) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -39,6 +39,18 @@ ActiveRecord::Schema.define(version: 2022_04_15_193829) do
     t.index ["user_id", "created_at"], name: "index_answers_on_user_id_and_created_at"
   end
 
+  create_table "appendables", force: :cascade do |t|
+    t.string "type", null: false
+    t.bigint "user_id", null: false
+    t.bigint "parent_id", null: false
+    t.string "parent_type", null: false
+    t.text "content"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["parent_id", "parent_type"], name: "index_appendables_on_parent_id_and_parent_type"
+    t.index ["user_id", "created_at"], name: "index_appendables_on_user_id_and_created_at"
+  end
+
   create_table "comment_smiles", id: :bigint, default: -> { "gen_timestamp_id('comment_smiles'::text)" }, force: :cascade do |t|
     t.bigint "user_id"
     t.bigint "comment_id"
@@ -143,7 +155,7 @@ ActiveRecord::Schema.define(version: 2022_04_15_193829) do
     t.string "content"
     t.boolean "author_is_anonymous"
     t.string "author_name"
-    t.string "author_email"
+    t.string "author_identifier"
     t.bigint "user_id"
     t.datetime "created_at"
     t.datetime "updated_at"