discourse/lib/tasks/db.rake

327 lines
8.7 KiB
Ruby

# frozen_string_literal: true
# we should set the locale before the migration
task 'set_locale' do
begin
I18n.locale = (SiteSetting.default_locale || :en) rescue :en
rescue I18n::InvalidLocale
I18n.locale = :en
end
end
module MultisiteTestHelpers
def self.load_multisite?
Rails.env.test? && !ENV["RAILS_DB"] && !ENV["SKIP_MULTISITE"]
end
def self.create_multisite?
(ENV["RAILS_ENV"] == "test" || !ENV["RAILS_ENV"]) && !ENV["RAILS_DB"] && !ENV["SKIP_MULTISITE"]
end
end
task 'db:environment:set' => [:load_config] do |_, args|
if MultisiteTestHelpers.load_multisite?
system("RAILS_ENV=test RAILS_DB=discourse_test_multisite rake db:environment:set")
end
end
task 'db:force_skip_persist' do
GlobalSetting.skip_db = true
GlobalSetting.skip_redis = true
end
task 'db:create' => [:load_config] do |_, args|
if MultisiteTestHelpers.create_multisite?
unless system("RAILS_ENV=test RAILS_DB=discourse_test_multisite rake db:create")
STDERR.puts "-" * 80
STDERR.puts "ERROR: Could not create multisite DB. A common cause of this is a plugin"
STDERR.puts "checking the column structure when initializing, which raises an error."
STDERR.puts "-" * 80
raise "Could not initialize discourse_test_multisite"
end
end
end
begin
reqs = Rake::Task['db:create'].prerequisites.map(&:to_sym)
Rake::Task['db:create'].clear_prerequisites
Rake::Task['db:create'].enhance(["db:force_skip_persist"] + reqs)
end
task 'db:drop' => [:load_config] do |_, args|
if MultisiteTestHelpers.create_multisite?
system("RAILS_DB=discourse_test_multisite RAILS_ENV=test rake db:drop")
end
end
begin
Rake::Task["db:migrate"].clear
Rake::Task["db:rollback"].clear
end
task 'db:rollback' => ['environment', 'set_locale'] do |_, args|
step = ENV["STEP"] ? ENV["STEP"].to_i : 1
ActiveRecord::Base.connection.migration_context.rollback(step)
Rake::Task['db:_dump'].invoke
end
# our optimized version of multisite migrate, we have many sites and we have seeds
# this ensures we can run migrations concurrently to save huge amounts of time
Rake::Task['multisite:migrate'].clear
class StdOutDemux
def initialize(stdout)
@stdout = stdout
@data = {}
end
def write(data)
(@data[Thread.current] ||= +"") << data
end
def close
finish_chunk
end
def finish_chunk
data = @data[Thread.current]
if data
@stdout.write(data)
@data.delete Thread.current
end
end
def flush
# Do nothing
end
end
task 'multisite:migrate' => ['db:load_config', 'environment', 'set_locale'] do |_, args|
if ENV["RAILS_ENV"] != "production"
raise "Multisite migrate is only supported in production"
end
concurrency = (ENV['MIGRATE_CONCURRENCY'].presence || "20").to_i
puts "Multisite migrator is running using #{concurrency} threads"
puts
queue = Queue.new
exceptions = Queue.new
old_stdout = $stdout
$stdout = StdOutDemux.new($stdout)
RailsMultisite::ConnectionManagement.each_connection do |db|
queue << db
end
concurrency.times { queue << :done }
SeedFu.quiet = true
(1..concurrency).map do
Thread.new {
while true
db = queue.pop
break if db == :done
RailsMultisite::ConnectionManagement.with_connection(db) do
begin
puts "Migrating #{db}"
ActiveRecord::Tasks::DatabaseTasks.migrate
SeedFu.seed(DiscoursePluginRegistry.seed_paths)
if !Discourse.skip_post_deployment_migrations? && ENV['SKIP_OPTIMIZE_ICONS'] != '1'
SiteIconManager.ensure_optimized!
end
rescue => e
exceptions << [db, e]
ensure
begin
$stdout.finish_chunk
rescue => ex
STDERR.puts ex.inspect
STDERR.puts ex.backtrace
end
end
end
end
}
end.each(&:join)
$stdout = old_stdout
if exceptions.length > 0
STDERR.puts
STDERR.puts "-" * 80
STDERR.puts "#{exceptions.length} migrations failed!"
while !exceptions.empty?
db, e = exceptions.pop
STDERR.puts
STDERR.puts "Failed to migrate #{db}"
STDERR.puts e.inspect
STDERR.puts e.backtrace
STDERR.puts
end
exit 1
end
Rake::Task['db:_dump'].invoke
end
# we need to run seed_fu every time we run rake db:migrate
task 'db:migrate' => ['load_config', 'environment', 'set_locale'] do |_, args|
ActiveRecord::Tasks::DatabaseTasks.migrate
if !Discourse.is_parallel_test?
Rake::Task['db:_dump'].invoke
end
SeedFu.quiet = true
SeedFu.seed(DiscoursePluginRegistry.seed_paths)
if !Discourse.skip_post_deployment_migrations? && ENV['SKIP_OPTIMIZE_ICONS'] != '1'
SiteIconManager.ensure_optimized!
end
if !Discourse.is_parallel_test? && MultisiteTestHelpers.load_multisite?
system("RAILS_DB=discourse_test_multisite rake db:migrate")
end
end
task 'test:prepare' => 'environment' do
I18n.locale = SiteSetting.default_locale rescue :en
SeedFu.seed(DiscoursePluginRegistry.seed_paths)
end
task 'db:api_test_seed' => 'environment' do
puts "Loading test data for discourse_api"
load Rails.root + 'db/api_test_seeds.rb'
end
def print_table(array)
width = array[0].keys.map { |k| k.to_s.length }
cols = array[0].keys.length
array.each do |row|
row.each_with_index do |(_, val), i|
width[i] = [width[i].to_i, val.to_s.length].max
end
end
array[0].keys.each_with_index do |col, i|
print col.to_s.ljust(width[i], ' ')
if i == cols - 1
puts
else
print ' | '
end
end
puts "-" * (width.sum + width.length)
array.each do |row|
row.each_with_index do |(_, val), i|
print val.to_s.ljust(width[i], ' ')
if i == cols - 1
puts
else
print ' | '
end
end
end
end
desc 'Statistics about database'
task 'db:stats' => 'environment' do
sql = <<~SQL
select table_name,
(
select reltuples::bigint
from pg_class
where oid = ('public.' || table_name)::regclass
) AS row_estimate,
pg_size_pretty(pg_table_size(quote_ident(table_name))) table_size,
pg_size_pretty(pg_indexes_size(quote_ident(table_name))) index_size,
pg_size_pretty(pg_total_relation_size(quote_ident(table_name))) total_size
from information_schema.tables
where table_schema = 'public'
order by pg_total_relation_size(quote_ident(table_name)) DESC
SQL
puts
print_table(DB.query_hash(sql))
end
desc 'Rebuild indexes'
task 'db:rebuild_indexes' => 'environment' do
if Import::backup_tables_count > 0
raise "Backup from a previous import exists. Drop them before running this job with rake import:remove_backup, or move them to another schema."
end
Discourse.enable_readonly_mode
backup_schema = Jobs::Importer::BACKUP_SCHEMA
table_names = DB.query_single("select table_name from information_schema.tables where table_schema = 'public'")
begin
# Move all tables to the backup schema:
DB.exec("DROP SCHEMA IF EXISTS #{backup_schema} CASCADE")
DB.exec("CREATE SCHEMA #{backup_schema}")
table_names.each do |table_name|
DB.exec("ALTER TABLE public.#{table_name} SET SCHEMA #{backup_schema}")
end
# Create a new empty db
Rake::Task["db:migrate"].invoke
# Fetch index definitions from the new db
index_definitions = {}
table_names.each do |table_name|
index_definitions[table_name] = DB.query_single("SELECT indexdef FROM pg_indexes WHERE tablename = '#{table_name}' and schemaname = 'public';")
end
# Drop the new tables
table_names.each do |table_name|
DB.exec("DROP TABLE public.#{table_name}")
end
# Move the old tables back to the public schema
table_names.each do |table_name|
DB.exec("ALTER TABLE #{backup_schema}.#{table_name} SET SCHEMA public")
end
# Drop their indexes
index_names = DB.query_single("SELECT indexname FROM pg_indexes WHERE schemaname = 'public' AND tablename IN ('#{table_names.join("', '")}')")
index_names.each do |index_name|
begin
puts index_name
DB.exec("DROP INDEX public.#{index_name}")
rescue ActiveRecord::StatementInvalid
# It's this:
# PG::Error: ERROR: cannot drop index category_users_pkey because constraint category_users_pkey on table category_users requires it
# HINT: You can drop constraint category_users_pkey on table category_users instead.
end
end
# Create the indexes
table_names.each do |table_name|
index_definitions[table_name].each do |index_def|
begin
DB.exec(index_def)
rescue ActiveRecord::StatementInvalid
# Trying to recreate a primary key
end
end
end
rescue
# Can we roll this back?
raise
ensure
Discourse.disable_readonly_mode
end
end