ippeiukai’s gists

ippeiukai / faster_fixture_loading.rb

Last active December 18, 2015 09:59

A monkey patch that speeds up fixture loading of Rails 3.2. The speed up in my case was by five-fold (with ``time rake db:fixtures:load``), quite significant if you have a large set of fixtures and load them regularly.

	# for Rails 3.2.12
	# loads fixtures a lot faster

	require 'active_record/fixtures'
	class ActiveRecord::Fixtures

	# based on activerecord-3.2.12/lib/active_record/fixtures.rb l.462
	# modified lines are marked CHANGED
	def self.create_fixtures(fixtures_directory, table_names, class_names = {})
	table_names = [table_names].flatten.map { \|n\| n.to_s }

ippeiukai / maybe.rb

Created July 30, 2013 12:04

[Joke] true, false, and ... maybe for Ruby

	class MaybeClass < DelegateClass(FalseClass)

	LIKELIHOOD = 0.4

	def initialize
	super(rand < LIKELIHOOD)
	end

	def ==(obj)
	obj.class == self.class

ippeiukai / sequel_sqlite_readonly.rb

Created December 19, 2013 04:32

Monkey patch to Sequel (http://github.com/jeremyevans/sequel) that allows it to optionally open a SQLite database in readonly mode

	# coding: utf-8

	require 'sequel/adapters/sqlite'

	# monkey patch to optionally open database in read-only mode
	class ::Sequel::SQLite::Database

	# [Copied] from sequel-4.5.0/lib/sequel/adapters/sqlite.rb
	def connect(server)
	opts = server_opts(server)

ippeiukai / two_plus_two_is_five.rb

Last active December 12, 2015 15:34

2 + 2 = 5 in Ruby. (http://en.wikipedia.org/wiki/Two_plus_two_make_five)

	module TwoPlusTwoIsFive

	def self.included(base)
	base.class_exec do
	alias_method :plus_without_two_plus_two_is_five, :+
	private :plus_without_two_plus_two_is_five
	alias_method :+, :plus_with_two_plus_two_is_five
	public :+
	end
	end

ippeiukai / sequel_abstract_model.rb

Last active November 25, 2015 09:47

Monkey patch to Sequel (http://github.com/jeremyevans/sequel) that lets you cleanly create an abstract model.

	require 'sequel/model'

	module Sequel
	class << self

	# abstract model needs to avoid inherited callback
	# (see https://groups.google.com/forum/#!msg/sequel-talk/OG5ti9JAJIE/p1iqO57cwqwJ)

	# MyAbstractModel = Sequel.new_abstract_model do
	# # ... your common stuff ...

ippeiukai / mongoid_embedded_object.rb

Last active August 29, 2015 14:08

A rough solution to https://github.com/mongoid/mongoid/issues/3794

	module MongoidEmbeddedObjectModification

	# Custom field behaves more like an immutable value.
	# Your changes to the object obtained with getter method will not take an effect unless you assign it back.
	# https://github.com/mongoid/mongoid/issues/3341
	def modify(mongoid_doc, field_name)
	obj = mongoid_doc.public_send(field_name)
	yield obj
	mongoid_doc.public_send("#{field_name}=", obj)
	end

ippeiukai / mongoid_custom_array.rb

Last active November 25, 2015 09:27

A rough solution to https://jira.mongodb.org/browse/MONGOID-3042

	module MongoidEmbeddedObjectModification

	# Custom field behaves more like an immutable value.
	# Your changes to the object obtained with getter method will not take an effect unless you assign it back.
	# https://github.com/mongoid/mongoid/issues/3341
	def modify(mongoid_doc, field_name)
	obj = mongoid_doc.public_send(field_name)
	yield obj
	mongoid_doc.public_send("#{field_name}=", obj)
	end

ippeiukai / monkey_patch_columns_on_demand_4_2_0_for_rails_4_2_1.rb

Last active August 29, 2015 14:18

for https://github.com/willbryant/columns_on_demand/issues/2

	# monkey patch for https://github.com/willbryant/columns_on_demand/issues/2

	require 'active_record'
	require 'columns_on_demand'


	module ColumnsOnDemand
	module BaseMethods

	# COPIED

ippeiukai / rails_bulk_update.rb

Last active August 29, 2015 14:18

bulk update of records in rails with UPDATE SET FROM (VALUES ...) AS WHERE

	# NOTE assumes the relation is very very simple
	def bulk_update(relation, values, where_columns, set_columns)
	return if values.empty?

	connection = relation.connection
	base_class = relation.base_class

	if relation.arel.where_sql.present?
	relation_ids = relation.ids
	end

ippeiukai / use_single_forwardable_with_active_support.rb

Created May 14, 2015 02:29

Have you ever wanted to use def_single_delegator from SingleForwardable but still continue to use `delegate` of ActiveSupport?


	module UseSingleForwardableWithActiveSupport
	extend ActiveSupport::Concern

	included do
	original_delegate_method = method(:delegate).unbind if self.respond_to?(:delegate)
	extend SingleForwardable
	if original_delegate_method.present?
	# restore the delegate of ActiveSupport that has been overshadowed by SingleForwardable
	define_singleton_method :delegate, original_delegate_method

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