Use more robust hook for loading timestamp_id function into database (#15919)

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Claire 2021-03-19 02:43:13 +01:00 committed by GitHub
parent a4dcaef53b
commit 9aaaa96d2f
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4 changed files with 23 additions and 58 deletions

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@ -28,6 +28,7 @@ require_relative '../lib/webpacker/manifest_extensions'
require_relative '../lib/webpacker/helper_extensions'
require_relative '../lib/action_dispatch/cookie_jar_extensions'
require_relative '../lib/rails/engine_extensions'
require_relative '../lib/active_record/database_tasks_extensions'
Dotenv::Railtie.load

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@ -1,7 +1,7 @@
class StatusIdsToTimestampIds < ActiveRecord::Migration[5.1]
def up
# Prepare the function we will use to generate IDs.
Rake::Task['db:define_timestamp_id'].execute
Mastodon::Snowflake.define_timestamp_id
# Set up the statuses.id column to use our timestamp-based IDs.
ActiveRecord::Base.connection.execute(<<~SQL)
@ -11,7 +11,7 @@ class StatusIdsToTimestampIds < ActiveRecord::Migration[5.1]
SQL
# Make sure we have a sequence to use.
Rake::Task['db:ensure_id_sequences_exist'].execute
Mastodon::Snowflake.ensure_id_sequences_exist
end
def down

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@ -0,0 +1,20 @@
# frozen_string_literal: true
require_relative '../mastodon/snowflake'
module ActiveRecord
module Tasks
module DatabaseTasks
original_load_schema = instance_method(:load_schema)
define_method(:load_schema) do |db_config, *args|
ActiveRecord::Base.establish_connection(db_config)
Mastodon::Snowflake.define_timestamp_id
original_load_schema.bind(self).call(db_config, *args)
Mastodon::Snowflake.ensure_id_sequences_exist
end
end
end
end

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@ -1,36 +1,5 @@
# frozen_string_literal: true
require_relative '../mastodon/snowflake'
def each_schema_load_environment
# If we're in development, also run this for the test environment.
# This is a somewhat hacky way to do this, so here's why:
# 1. We have to define this before we load the schema, or we won't
# have a timestamp_id function when we get to it in the schema.
# 2. db:setup calls db:schema:load_if_ruby, which calls
# db:schema:load, which we define above as having a prerequisite
# of this task.
# 3. db:schema:load ends up running
# ActiveRecord::Tasks::DatabaseTasks.load_schema_current, which
# calls a private method `each_current_configuration`, which
# explicitly also does the loading for the `test` environment
# if the current environment is `development`, so we end up
# needing to do the same, and we can't even use the same method
# to do it.
if Rails.env.development?
test_conf = ActiveRecord::Base.configurations['test']
if test_conf['database']&.present?
ActiveRecord::Base.establish_connection(:test)
yield
ActiveRecord::Base.establish_connection(Rails.env.to_sym)
end
end
yield
end
namespace :db do
namespace :migrate do
desc 'Setup the db or migrate depending on state of db'
@ -61,29 +30,4 @@ namespace :db do
end
Rake::Task['db:migrate'].enhance(['db:post_migration_hook'])
# Before we load the schema, define the timestamp_id function.
# Idiomatically, we might do this in a migration, but then it
# wouldn't end up in schema.rb, so we'd need to figure out a way to
# get it in before doing db:setup as well. This is simpler, and
# ensures it's always in place.
Rake::Task['db:schema:load'].enhance ['db:define_timestamp_id']
# After we load the schema, make sure we have sequences for each
# table using timestamp IDs.
Rake::Task['db:schema:load'].enhance do
Rake::Task['db:ensure_id_sequences_exist'].invoke
end
task :define_timestamp_id do
each_schema_load_environment do
Mastodon::Snowflake.define_timestamp_id
end
end
task :ensure_id_sequences_exist do
each_schema_load_environment do
Mastodon::Snowflake.ensure_id_sequences_exist
end
end
end