Remove DB timestamp defaults

This removes the DB timestamp column defaults, and manages those values
in the model domain object instead.

app/models/wiki_page/meta.rb

@@ -74,9 +74,9 @@ class WikiPage
 
       if persisted?
         transaction do
-          slugs.canonical.update_all(updated_at: Time.now, canonical: false)
+          slugs.canonical.update_all(canonical: false)
           page_slug = slugs.create_with(canonical: true).find_or_create_by(slug: slug)
-          page_slug.update_columns(canonical: true, updated_at: Time.now) unless page_slug.canonical?
+          page_slug.update_columns(canonical: true) unless page_slug.canonical?
         end
       else
         slugs.new(slug: slug, canonical: true)
@@ -91,21 +91,30 @@ class WikiPage
       self.canonical_slug = wiki_page.slug
     end
 
+    def update_columns(attrs = {})
+      super(attrs.reverse_merge(updated_at: Time.now.utc))
+    end
+
+    def self.update_all(attrs = {})
+      super(attrs.reverse_merge(updated_at: Time.now.utc))
+    end
+
     private
 
     def update_wiki_page_attributes(page)
-      update_columns(title: page.title, updated_at: Time.now) unless page.title == title
+      update_columns(title: page.title) unless page.title == title
     end
 
     def insert_slugs(strings, is_new, canonical_slug)
-      creation = Time.now
+      creation = Time.now.utc
 
       slug_attrs = strings.map do |slug|
         {
           wiki_page_meta_id: id,
           slug: slug,
           canonical: (is_new && slug == canonical_slug),
-          created_at: creation
+          created_at: creation,
+          updated_at: creation
         }
       end
       slugs.insert_all(slug_attrs) unless !is_new && slug_attrs.size == 1

app/models/wiki_page/slug.rb

@@ -14,5 +14,13 @@ class WikiPage
     }
 
     scope :canonical, -> { where(canonical: true) }
+
+    def update_columns(attrs = {})
+      super(attrs.reverse_merge(updated_at: Time.now.utc))
+    end
+
+    def self.update_all(attrs = {})
+      super(attrs.reverse_merge(updated_at: Time.now.utc))
+    end
   end
 end

db/migrate/20200302152516_add_wiki_slug.rb

@@ -6,14 +6,14 @@ class AddWikiSlug < ActiveRecord::Migration[6.0]
   def change
     create_table :wiki_page_meta, id: :serial do |t|
       t.references :project, index: true, foreign_key: { on_delete: :cascade }, null: false
-      t.timestamps_with_timezone null: false, default: -> { 'NOW()' }
+      t.timestamps_with_timezone null: false
       t.string :title, null: false, limit: 255
     end
 
     create_table :wiki_page_slugs, id: :serial do |t|
       t.boolean :canonical, default: false, null: false
       t.references :wiki_page_meta, index: true, foreign_key: { on_delete: :cascade }, null: false
-      t.timestamps_with_timezone null: false, default: -> { 'NOW()' }
+      t.timestamps_with_timezone null: false
       t.string :slug, null: false, limit: 2048
       t.index [:slug, :wiki_page_meta_id], unique: true
       t.index [:wiki_page_meta_id], name: 'one_canonical_wiki_page_slug_per_metadata', unique: true, where: "(canonical = true)"

db/schema.rb

@@ -4669,8 +4669,8 @@ ActiveRecord::Schema.define(version: 2020_03_13_123934) do
 
   create_table "wiki_page_meta", id: :serial, force: :cascade do |t|
     t.bigint "project_id", null: false
-    t.datetime_with_timezone "created_at", default: -> { "now()" }, null: false
-    t.datetime_with_timezone "updated_at", default: -> { "now()" }, null: false
+    t.datetime_with_timezone "created_at", null: false
+    t.datetime_with_timezone "updated_at", null: false
     t.string "title", limit: 255, null: false
     t.index ["project_id"], name: "index_wiki_page_meta_on_project_id"
   end
@@ -4678,8 +4678,8 @@ ActiveRecord::Schema.define(version: 2020_03_13_123934) do
   create_table "wiki_page_slugs", id: :serial, force: :cascade do |t|
     t.boolean "canonical", default: false, null: false
     t.bigint "wiki_page_meta_id", null: false
-    t.datetime_with_timezone "created_at", default: -> { "now()" }, null: false
-    t.datetime_with_timezone "updated_at", default: -> { "now()" }, null: false
+    t.datetime_with_timezone "created_at", null: false
+    t.datetime_with_timezone "updated_at", null: false
     t.string "slug", limit: 2048, null: false
     t.index ["slug", "wiki_page_meta_id"], name: "index_wiki_page_slugs_on_slug_and_wiki_page_meta_id", unique: true
     t.index ["wiki_page_meta_id"], name: "index_wiki_page_slugs_on_wiki_page_meta_id"