Add migration to create resource milestone events table

changelogs/unreleased/38096-splitmr-add-resource-milestone-events-table-pd.yml

+---
+title: Add migration to create resource milestone events table
+merge_request: 23965
+author:
+type: added

db/migrate/20200129133716_add_resource_milestone_events_table.rb

+# frozen_string_literal: true
+
+class AddResourceMilestoneEventsTable < ActiveRecord::Migration[5.2]
+  DOWNTIME = false
+
+  def change
+    create_table :resource_milestone_events, id: :bigserial do |t|
+      t.references :user, null: false, foreign_key: { on_delete: :nullify },
+                   index: { name: 'index_resource_milestone_events_on_user_id' }
+      t.references :issue, null: true, foreign_key: { on_delete: :cascade },
+                   index: { name: 'index_resource_milestone_events_on_issue_id' }
+      t.references :merge_request, null: true, foreign_key: { on_delete: :cascade },
+                   index: { name: 'index_resource_milestone_events_on_merge_request_id' }
+      t.references :milestone, foreign_key: { on_delete: :cascade },
+                   index: { name: 'index_resource_milestone_events_on_milestone_id' }
+
+      t.integer :action, limit: 2, null: false
+      t.integer :state, limit: 2, null: false
+      t.integer :cached_markdown_version
+      t.text :reference
+      t.text :reference_html
+      t.datetime_with_timezone :created_at, null: false
+    end
+  end
+end

db/schema.rb

@@ -3669,6 +3669,23 @@ ActiveRecord::Schema.define(version: 2020_01_30_161817) do
     t.index ["user_id"], name: "index_resource_label_events_on_user_id"
   end
 
+  create_table "resource_milestone_events", force: :cascade do |t|
+    t.bigint "user_id", null: false
+    t.bigint "issue_id"
+    t.bigint "merge_request_id"
+    t.bigint "milestone_id"
+    t.integer "action", limit: 2, null: false
+    t.integer "state", limit: 2, null: false
+    t.integer "cached_markdown_version"
+    t.text "reference"
+    t.text "reference_html"
+    t.datetime_with_timezone "created_at", null: false
+    t.index ["issue_id"], name: "index_resource_milestone_events_on_issue_id"
+    t.index ["merge_request_id"], name: "index_resource_milestone_events_on_merge_request_id"
+    t.index ["milestone_id"], name: "index_resource_milestone_events_on_milestone_id"
+    t.index ["user_id"], name: "index_resource_milestone_events_on_user_id"
+  end
+
   create_table "resource_weight_events", force: :cascade do |t|
     t.bigint "user_id", null: false
     t.bigint "issue_id", null: false
@@ -4830,6 +4847,10 @@ ActiveRecord::Schema.define(version: 2020_01_30_161817) do
   add_foreign_key "resource_label_events", "labels", on_delete: :nullify
   add_foreign_key "resource_label_events", "merge_requests", on_delete: :cascade
   add_foreign_key "resource_label_events", "users", on_delete: :nullify
+  add_foreign_key "resource_milestone_events", "issues", on_delete: :cascade
+  add_foreign_key "resource_milestone_events", "merge_requests", on_delete: :cascade
+  add_foreign_key "resource_milestone_events", "milestones", on_delete: :cascade
+  add_foreign_key "resource_milestone_events", "users", on_delete: :nullify
   add_foreign_key "resource_weight_events", "issues", on_delete: :cascade
   add_foreign_key "resource_weight_events", "users", on_delete: :nullify
   add_foreign_key "reviews", "merge_requests", on_delete: :cascade