mirror of
https://github.com/discourse/discourse.git
synced 2024-11-23 01:16:22 +08:00
45ccadeeeb
Rails 6.1.3.1 deprecates a few API and has some internal changes that break our tests suite, so this commit fixes all the deprecations and errors and now Discourse should be fully compatible with Rails 6.1.3.1. We also have a new release of the rails_failover gem that's compatible with Rails 6.1.3.1.
90 lines
2.6 KiB
Ruby
90 lines
2.6 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
# Speeds up #pluck so its about 2.2x faster, importantly makes pluck avoid creation of a slew
|
|
# of AR objects
|
|
#
|
|
#
|
|
class ActiveRecord::Relation
|
|
|
|
# Note: In discourse, the following code is included in lib/sql_builder.rb
|
|
#
|
|
# class RailsDateTimeDecoder < PG::SimpleDecoder
|
|
# def decode(string, tuple=nil, field=nil)
|
|
# if Rails.version >= "4.2.0"
|
|
# @caster ||= ActiveRecord::Type::DateTime.new
|
|
# @caster.type_cast_from_database(string)
|
|
# else
|
|
# ActiveRecord::ConnectionAdapters::Column.string_to_time string
|
|
# end
|
|
# end
|
|
# end
|
|
#
|
|
# class ActiveRecordTypeMap < PG::BasicTypeMapForResults
|
|
# def initialize(connection)
|
|
# super(connection)
|
|
# rm_coder 0, 1114
|
|
# add_coder RailsDateTimeDecoder.new(name: "timestamp", oid: 1114, format: 0)
|
|
# # we don't need deprecations
|
|
# self.default_type_map = PG::TypeMapInRuby.new
|
|
# end
|
|
# end
|
|
#
|
|
# def self.pg_type_map
|
|
# conn = ActiveRecord::Base.connection.raw_connection
|
|
# @typemap ||= ActiveRecordTypeMap.new(conn)
|
|
# end
|
|
|
|
class ::ActiveRecord::ConnectionAdapters::PostgreSQLAdapter
|
|
def select_raw(arel, name = nil, binds = [], &block)
|
|
arel = arel_from_relation(arel)
|
|
sql, binds = to_sql_and_binds(arel, binds)
|
|
execute_and_clear(sql, name, binds, &block)
|
|
end
|
|
end
|
|
|
|
def pluck(*column_names)
|
|
if loaded? && (column_names.map(&:to_s) - @klass.attribute_names - @klass.attribute_aliases.keys).empty?
|
|
return records.pluck(*column_names)
|
|
end
|
|
|
|
if has_include?(column_names.first)
|
|
relation = apply_join_dependency
|
|
relation.pluck(*column_names)
|
|
else
|
|
enforce_raw_sql_whitelist(column_names)
|
|
relation = spawn
|
|
|
|
relation.select_values = column_names
|
|
|
|
klass.connection.select_raw(relation.arel) do |result, _|
|
|
result.type_map = DB.type_map
|
|
result.nfields == 1 ? result.column_values(0) : result.values
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
# require 'benchmark/ips'
|
|
#
|
|
# ENV['RAILS_ENV'] = 'production'
|
|
# require File.expand_path("../../config/environment", __FILE__)
|
|
#
|
|
# Benchmark.ips do |x|
|
|
# x.report("fast_pluck") do
|
|
# Post.where(topic_id: 48464).fast_pluck(:id)
|
|
# end
|
|
#
|
|
# x.report("pluck") do
|
|
# Post.where(topic_id: 48464).pluck(:id)
|
|
# end
|
|
# end
|
|
#
|
|
# % ruby tmp/fast_pluck.rb
|
|
# Calculating -------------------------------------
|
|
# fast_pluck 165.000 i/100ms
|
|
# pluck 80.000 i/100ms
|
|
# -------------------------------------------------
|
|
# fast_pluck 1.720k (± 8.8%) i/s - 8.580k
|
|
# pluck 807.913 (± 4.0%) i/s - 4.080k
|
|
#
|