Commit b0e30189 authored by Jarka Kadlecova's avatar Jarka Kadlecova

Migrate issues authored by deleted user to the Ghost user

parent 597bc292
---
title: Migrate issues authored by deleted user to the Ghost user
merge_request:
author:
type: fixed
class MigrateIssuesToGhostUser < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
class User < ActiveRecord::Base
self.table_name = 'users'
end
class Issue < ActiveRecord::Base
self.table_name = 'issues'
include ::EachBatch
end
def reset_column_in_migration_models
ActiveRecord::Base.clear_cache!
::User.reset_column_information
end
def up
reset_column_in_migration_models
# we use the model method because rewriting it is too complicated and would require copying multiple methods
ghost_id = ::User.ghost.id
Issue.where('NOT EXISTS (?)', User.unscoped.select(1).where('issues.author_id = users.id')).each_batch do |relation|
relation.update_all(author_id: ghost_id)
end
end
def down
end
end
class AddForeignKeyToIssueAuthor < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
def up
add_concurrent_foreign_key(:issues, :users, column: :author_id, on_delete: :nullify)
end
def down
remove_foreign_key(:issues, column: :author_id)
end
end
...@@ -11,7 +11,7 @@ ...@@ -11,7 +11,7 @@
# #
# It's strongly recommended that you check this file into your version control system. # It's strongly recommended that you check this file into your version control system.
ActiveRecord::Schema.define(version: 20170824162758) do ActiveRecord::Schema.define(version: 20170901071411) do
# These are extensions that must be enabled in order to support this database # These are extensions that must be enabled in order to support this database
enable_extension "plpgsql" enable_extension "plpgsql"
...@@ -1707,6 +1707,7 @@ ActiveRecord::Schema.define(version: 20170824162758) do ...@@ -1707,6 +1707,7 @@ ActiveRecord::Schema.define(version: 20170824162758) do
add_foreign_key "issue_assignees", "users", name: "fk_5e0c8d9154", on_delete: :cascade add_foreign_key "issue_assignees", "users", name: "fk_5e0c8d9154", on_delete: :cascade
add_foreign_key "issue_metrics", "issues", on_delete: :cascade add_foreign_key "issue_metrics", "issues", on_delete: :cascade
add_foreign_key "issues", "projects", name: "fk_899c8f3231", on_delete: :cascade add_foreign_key "issues", "projects", name: "fk_899c8f3231", on_delete: :cascade
add_foreign_key "issues", "users", column: "author_id", name: "fk_05f1e72feb", on_delete: :cascade
add_foreign_key "label_priorities", "labels", on_delete: :cascade add_foreign_key "label_priorities", "labels", on_delete: :cascade
add_foreign_key "label_priorities", "projects", on_delete: :cascade add_foreign_key "label_priorities", "projects", on_delete: :cascade
add_foreign_key "labels", "namespaces", column: "group_id", on_delete: :cascade add_foreign_key "labels", "namespaces", column: "group_id", on_delete: :cascade
......
require 'spec_helper'
require Rails.root.join('db', 'migrate', '20170825104051_migrate_issues_to_ghost_user.rb')
describe MigrateIssuesToGhostUser, :migration do
describe '#up' do
let(:projects) { table(:projects) }
let(:issues) { table(:issues) }
let(:users) { table(:users) }
before do
projects.create!(name: 'gitlab')
user = users.create(email: 'test@example.com')
issues.create(title: 'Issue 1', author_id: nil, project_id: 1)
issues.create(title: 'Issue 2', author_id: user.id, project_id: 1)
end
context 'when ghost user exists' do
let!(:ghost) { users.create(ghost: true, email: 'ghost@example.com') }
it 'does not create a new user' do
expect { schema_migrate_up! }.not_to change { User.count }
end
it 'migrates issues where author = nil to the ghost user' do
schema_migrate_up!
expect(issues.first.reload.author_id).to eq(ghost.id)
end
it 'does not change issues authored by an existing user' do
expect { schema_migrate_up! }.not_to change { issues.second.reload.author_id}
end
end
context 'when ghost user does not exist' do
it 'creates a new user' do
expect { schema_migrate_up! }.to change { User.count }.by(1)
end
it 'migrates issues where author = nil to the ghost user' do
schema_migrate_up!
expect(issues.first.reload.author_id).to eq(User.ghost.id)
end
it 'does not change issues authored by an existing user' do
expect { schema_migrate_up! }.not_to change { issues.second.reload.author_id}
end
end
end
end
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