Added count for label, assignee, and milestone lists

changelogs/unreleased/ccr-48800-ping_for_boards.yml

+---
+title: Adds count for different board list types (label lists, assignee lists, and
+  milestone lists) to usage statistics.
+merge_request: 21208
+author:
+type: changed

db/migrate/20180815175440_add_index_on_list_type.rb

+# frozen_string_literal: true
+class AddIndexOnListType < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :lists, :list_type
+  end
+
+  def down
+    remove_concurrent_index :lists, :list_type
+  end
+end

db/schema.rb

@@ -1135,6 +1135,7 @@ ActiveRecord::Schema.define(version: 20180816193530) do
   add_index "lists", ["board_id", "label_id"], name: "index_lists_on_board_id_and_label_id", unique: true, using: :btree
   add_index "lists", ["label_id"], name: "index_lists_on_label_id", using: :btree
+  add_index "lists", ["list_type"], name: "index_lists_on_list_type", using: :btree
   create_table "members", force: :cascade do |t|
     t.integer "access_level", null: false

lib/gitlab/usage_data.rb

@@ -34,6 +34,7 @@ module Gitlab
       def system_usage_data
         {
           counts: {
+            assignee_lists: List.assignee.count,
             boards: Board.count,
             ci_builds: ::Ci::Build.count,
             ci_internal_pipelines: ::Ci::Pipeline.internal.count,
@@ -61,9 +62,11 @@ module Gitlab
             groups: Group.count,
             issues: Issue.count,
             keys: Key.count,
+            label_lists: List.label.count,
             labels: Label.count,
             lfs_objects: LfsObject.count,
             merge_requests: MergeRequest.count,
+            milestone_lists: List.milestone.count,
             milestones: Milestone.count,
             notes: Note.count,
             pages_domains: PagesDomain.count,

spec/lib/gitlab/usage_data_spec.rb

@@ -56,6 +56,7 @@ describe Gitlab::UsageData do
       expect(count_data[:projects]).to eq(3)
       expect(count_data.keys).to match_array(%i(
+        assignee_lists
         boards
         ci_builds
         ci_internal_pipelines
@@ -83,9 +84,11 @@ describe Gitlab::UsageData do
         groups
         issues
         keys
+        label_lists
         labels
         lfs_objects
         merge_requests
+        milestone_lists
         milestones
         notes
         projects