TFW you forget to run `t.timestamps` in all your migrations

20171004204107_add_timestamps_everywhere.rb

class AddTimestampsEverywhere < ActiveRecord::Migration[5.1]
  def change
    change_table :candidates do |t|
      t.timestamps default: Time.zone.now
    end

    change_table :evaluations do |t|
      t.timestamps default: Time.zone.now
    end

    change_table :interviewers do |t|
      t.timestamps default: Time.zone.now
    end

    change_table :questions do |t|
      t.timestamps default: Time.zone.now
    end

    change_table :responses do |t|
      t.timestamps default: Time.zone.now
    end

    change_table :stages do |t|
      t.timestamps default: Time.zone.now
    end

    change_table :workflows do |t|
      t.timestamps default: Time.zone.now
    end
  end
end

20171004204600_remove_default_timestamp.rb

class RemoveDefaultTimestamp < ActiveRecord::Migration[5.1]
  def change
    change_column_default :candidates, :created_at, from: Time.zone.now, to: nil
    change_column_default :candidates, :updated_at, from: Time.zone.now, to: nil

    change_column_default :evaluations, :created_at, from: Time.zone.now, to: nil
    change_column_default :evaluations, :updated_at, from: Time.zone.now, to: nil

    change_column_default :interviewers, :created_at, from: Time.zone.now, to: nil
    change_column_default :interviewers, :updated_at, from: Time.zone.now, to: nil

    change_column_default :questions, :created_at, from: Time.zone.now, to: nil
    change_column_default :questions, :updated_at, from: Time.zone.now, to: nil

    change_column_default :responses, :created_at, from: Time.zone.now, to: nil
    change_column_default :responses, :updated_at, from: Time.zone.now, to: nil

    change_column_default :stages, :created_at, from: Time.zone.now, to: nil
    change_column_default :stages, :updated_at, from: Time.zone.now, to: nil

    change_column_default :workflows, :created_at, from: Time.zone.now, to: nil
    change_column_default :workflows, :updated_at, from: Time.zone.now, to: nil
  end
end

schema.rb.patch

diff --git a/db/schema.rb b/db/schema.rb
index b41a2be..9aef2cd 100644
--- a/db/schema.rb
+++ b/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: 20171002174824) do
+ActiveRecord::Schema.define(version: 20171004204600) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -24,6 +24,8 @@ ActiveRecord::Schema.define(version: 20171002174824) do
     t.string "card_url"
     t.bigint "stage_id"
     t.boolean "active", default: true
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
     t.index ["stage_id"], name: "index_candidates_on_stage_id"
   end
 
@@ -32,11 +34,15 @@ ActiveRecord::Schema.define(version: 20171002174824) do
     t.text "purpose"
     t.text "preamble"
     t.text "prep_notes"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
   end
 
   create_table "interviewers", force: :cascade do |t|
     t.string "name", null: false
     t.string "email", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
   end
 
   create_table "interviews", force: :cascade do |t|
@@ -65,6 +71,8 @@ ActiveRecord::Schema.define(version: 20171002174824) do
     t.text "to_earn_a_5"
     t.text "notes"
     t.bigint "evaluation_id"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
     t.index ["evaluation_id"], name: "index_questions_on_evaluation_id"
     t.index ["id", "position"], name: "index_questions_on_id_and_position", unique: true
   end
@@ -77,6 +85,8 @@ ActiveRecord::Schema.define(version: 20171002174824) do
     t.text "evaluator_notes"
     t.integer "score_out_of_times_ten", default: 50
     t.bigint "interview_id"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
     t.index ["interview_id", "question_id"], name: "index_responses_on_interview_id_and_question_id", unique: true
     t.index ["interview_id"], name: "index_responses_on_interview_id"
     t.index ["question_id"], name: "index_responses_on_question_id"
@@ -87,12 +97,16 @@ ActiveRecord::Schema.define(version: 20171002174824) do
     t.integer "position"
     t.string "name"
     t.bigint "evaluation_id"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
     t.index ["evaluation_id"], name: "index_stages_on_evaluation_id"
     t.index ["workflow_id"], name: "index_stages_on_workflow_id"
   end
 
   create_table "workflows", force: :cascade do |t|
     t.string "name"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
   end
 
 end