Create namespace action table

This table will be used to record any actions associated with a
namespace when an action happened for the first time. Actions could be
the first MR that got pushed, the first issue that got created or the
first time a trial started.

app/models/namespace.rb

@@ -28,6 +28,7 @@ class Namespace < ApplicationRecord
 
   has_many :runner_namespaces, inverse_of: :namespace, class_name: 'Ci::RunnerNamespace'
   has_many :runners, through: :runner_namespaces, source: :runner, class_name: 'Ci::Runner'
+  has_many :namespace_onboarding_actions
 
   # This should _not_ be `inverse_of: :namespace`, because that would also set
   # `user.namespace` when this user creates a group with themselves as `owner`.

app/models/namespace_onboarding_action.rb

+# frozen_string_literal: true
+
+class NamespaceOnboardingAction < ApplicationRecord
+  belongs_to :namespace
+end

changelogs/unreleased/nicolasdular-namespace-onboarding-actions-table.yml

+---
+title: Create namespace onboarding actions table
+merge_request: 48018
+author:
+type: added

db/migrate/20201118093135_create_namespace_onboarding_actions.rb

+# frozen_string_literal: true
+
+class CreateNamespaceOnboardingActions < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def up
+    with_lock_retries do
+      create_table :namespace_onboarding_actions do |t|
+        t.references :namespace, index: true, null: false, foreign_key: { on_delete: :cascade }
+        t.datetime_with_timezone :created_at, null: false
+        t.integer :action, limit: 2, null: false
+      end
+    end
+  end
+
+  def down
+    with_lock_retries do
+      drop_table :namespace_onboarding_actions
+    end
+  end
+end

db/schema_migrations/20201118093135

+4be52737be2bc74e666e973fa42f17a16e652cb4fa2368c7f347c3f1f8941dbb
\ No newline at end of file

db/structure.sql

@@ -13868,6 +13868,22 @@ CREATE TABLE namespace_limits (
     temporary_storage_increase_ends_on date
 );
 
+CREATE TABLE namespace_onboarding_actions (
+    id bigint NOT NULL,
+    namespace_id bigint NOT NULL,
+    created_at timestamp with time zone NOT NULL,
+    action smallint NOT NULL
+);
+
+CREATE SEQUENCE namespace_onboarding_actions_id_seq
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+ALTER SEQUENCE namespace_onboarding_actions_id_seq OWNED BY namespace_onboarding_actions.id;
+
 CREATE TABLE namespace_root_storage_statistics (
     namespace_id integer NOT NULL,
     updated_at timestamp with time zone NOT NULL,
@@ -18018,6 +18034,8 @@ ALTER TABLE ONLY metrics_users_starred_dashboards ALTER COLUMN id SET DEFAULT ne
 
 ALTER TABLE ONLY milestones ALTER COLUMN id SET DEFAULT nextval('milestones_id_seq'::regclass);
 
+ALTER TABLE ONLY namespace_onboarding_actions ALTER COLUMN id SET DEFAULT nextval('namespace_onboarding_actions_id_seq'::regclass);
+
 ALTER TABLE ONLY namespace_statistics ALTER COLUMN id SET DEFAULT nextval('namespace_statistics_id_seq'::regclass);
 
 ALTER TABLE ONLY namespaces ALTER COLUMN id SET DEFAULT nextval('namespaces_id_seq'::regclass);
@@ -19265,6 +19283,9 @@ ALTER TABLE ONLY namespace_aggregation_schedules
 ALTER TABLE ONLY namespace_limits
     ADD CONSTRAINT namespace_limits_pkey PRIMARY KEY (namespace_id);
 
+ALTER TABLE ONLY namespace_onboarding_actions
+    ADD CONSTRAINT namespace_onboarding_actions_pkey PRIMARY KEY (id);
+
 ALTER TABLE ONLY namespace_root_storage_statistics
     ADD CONSTRAINT namespace_root_storage_statistics_pkey PRIMARY KEY (namespace_id);
 
@@ -21287,6 +21308,8 @@ CREATE INDEX index_mr_metrics_on_target_project_id_merged_at_nulls_last ON merge
 
 CREATE UNIQUE INDEX index_namespace_aggregation_schedules_on_namespace_id ON namespace_aggregation_schedules USING btree (namespace_id);
 
+CREATE INDEX index_namespace_onboarding_actions_on_namespace_id ON namespace_onboarding_actions USING btree (namespace_id);
+
 CREATE UNIQUE INDEX index_namespace_root_storage_statistics_on_namespace_id ON namespace_root_storage_statistics USING btree (namespace_id);
 
 CREATE UNIQUE INDEX index_namespace_statistics_on_namespace_id ON namespace_statistics USING btree (namespace_id);
@@ -23654,6 +23677,9 @@ ALTER TABLE ONLY merge_request_assignees
 ALTER TABLE ONLY packages_dependency_links
     ADD CONSTRAINT fk_rails_4437bf4070 FOREIGN KEY (dependency_id) REFERENCES packages_dependencies(id) ON DELETE CASCADE;
 
+ALTER TABLE ONLY namespace_onboarding_actions
+    ADD CONSTRAINT fk_rails_4504f6875a FOREIGN KEY (namespace_id) REFERENCES namespaces(id) ON DELETE CASCADE;
+
 ALTER TABLE ONLY project_auto_devops
     ADD CONSTRAINT fk_rails_45436b12b2 FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE;
 

spec/models/namespace_onboarding_action_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe NamespaceOnboardingAction do
+  it { is_expected.to belong_to :namespace }
+end

spec/models/namespace_spec.rb

@@ -19,6 +19,7 @@ RSpec.describe Namespace do
     it { is_expected.to have_one :aggregation_schedule }
     it { is_expected.to have_one :namespace_settings }
     it { is_expected.to have_many :custom_emoji }
+    it { is_expected.to have_many :namespace_onboarding_actions }
   end
 
   describe 'validations' do