Create Clusters::ServerlessDomain model

To store the association between a serverless domain and a cluster

app/models/serverless/domain_cluster.rb

+# frozen_string_literal: true
+
+module Serverless
+  class DomainCluster < ApplicationRecord
+    self.table_name = 'serverless_domain_cluster'
+
+    belongs_to :pages_domain
+    belongs_to :knative, class_name: 'Clusters::Applications::Knative', foreign_key: 'clusters_applications_knative_id'
+    belongs_to :creator, class_name: 'User', optional: true
+
+    validates :pages_domain, :knative, :uuid, presence: true
+    validates :uuid, uniqueness: true, length: { is: 14 }
+  end
+end

db/migrate/20191127030005_create_serverless_domain_cluster.rb

+# frozen_string_literal: true
+
+class CreateServerlessDomainCluster < ActiveRecord::Migration[5.2]
+  DOWNTIME = false
+
+  def change
+    create_table :serverless_domain_cluster, id: false, primary_key: :uuid do |t|
+      t.references :pages_domain, null: false, foreign_key: { on_delete: :cascade }
+      t.references :clusters_applications_knative, null: false,
+                   foreign_key: { to_table: :clusters_applications_knative, on_delete: :cascade },
+                   index: { name: :idx_serverless_domain_cluster_on_clusters_applications_knative, unique: true }
+      t.references :creator, name: :created_by, foreign_key: { to_table: :users, on_delete: :nullify }
+      t.timestamps_with_timezone null: false
+      t.string :uuid, null: false, limit: 14, primary_key: true
+    end
+  end
+end

db/schema.rb

@@ -3632,6 +3632,17 @@ ActiveRecord::Schema.define(version: 2019_12_08_071112) do
     t.index ["issue_id"], name: "index_sentry_issues_on_issue_id", unique: true
   end
 
+  create_table "serverless_domain_cluster", primary_key: "uuid", id: :string, limit: 14, force: :cascade do |t|
+    t.bigint "pages_domain_id", null: false
+    t.bigint "clusters_applications_knative_id", null: false
+    t.bigint "creator_id"
+    t.datetime_with_timezone "created_at", null: false
+    t.datetime_with_timezone "updated_at", null: false
+    t.index ["clusters_applications_knative_id"], name: "idx_serverless_domain_cluster_on_clusters_applications_knative", unique: true
+    t.index ["creator_id"], name: "index_serverless_domain_cluster_on_creator_id"
+    t.index ["pages_domain_id"], name: "index_serverless_domain_cluster_on_pages_domain_id"
+  end
+
   create_table "service_desk_settings", primary_key: "project_id", id: :bigint, default: nil, force: :cascade do |t|
     t.string "issue_template_key", limit: 255
   end
@@ -4688,6 +4699,9 @@ ActiveRecord::Schema.define(version: 2019_12_08_071112) do
   add_foreign_key "self_managed_prometheus_alert_events", "environments", on_delete: :cascade
   add_foreign_key "self_managed_prometheus_alert_events", "projects", on_delete: :cascade
   add_foreign_key "sentry_issues", "issues", on_delete: :cascade
+  add_foreign_key "serverless_domain_cluster", "clusters_applications_knative", on_delete: :cascade
+  add_foreign_key "serverless_domain_cluster", "pages_domains", on_delete: :cascade
+  add_foreign_key "serverless_domain_cluster", "users", column: "creator_id", on_delete: :nullify
   add_foreign_key "service_desk_settings", "projects", on_delete: :cascade
   add_foreign_key "services", "projects", name: "fk_71cce407f9", on_delete: :cascade
   add_foreign_key "slack_integrations", "services", on_delete: :cascade

spec/factories/serverless/domain_cluster.rb

+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :serverless_domain_cluster, class: Serverless::DomainCluster do
+    pages_domain { create(:pages_domain) }
+    knative { create(:clusters_applications_knative) }
+    creator { create(:user) }
+    uuid { SecureRandom.hex(7) }
+  end
+end

spec/models/serverless/domain_cluster_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Serverless::DomainCluster do
+  subject { create(:serverless_domain_cluster) }
+
+  describe 'validations' do
+    it { is_expected.to validate_presence_of(:pages_domain) }
+    it { is_expected.to validate_presence_of(:knative) }
+    it { is_expected.to validate_presence_of(:uuid) }
+
+    it { is_expected.to validate_uniqueness_of(:uuid) }
+    it { is_expected.to validate_length_of(:uuid).is_equal_to(14) }
+  end
+
+  describe 'associations' do
+    it { is_expected.to belong_to(:pages_domain) }
+    it { is_expected.to belong_to(:knative) }
+    it { is_expected.to belong_to(:creator).optional }
+  end
+end