Daniel cndaniel

@daniel: 这个问题有点麻烦哦，可能是 mac OSX 系统升级的问题呢，可以试着自己耐心按照下面步骤来哦：

export LDFLAGS=-L/usr/local/opt/openssl/lib

出现 permission denied

往往因为电脑上有多个用户导致的

先去 system preferences 确定用户的权限是管理员
再进终端： echo ~ user/whoami , 确定用户名是whoami
终端输入 sudo chown $(whoami):admin /usr/local && sudo chown -R $(whoami):admin /usr/local赋予权限

Rails Models

$ rails g model User

belongs_to

has_one

一路过来也部署过3、4个Rails App了，其中也使用过mina等远程部署项目，但每次去部署新的App还是会遇到一些大大小小问题。最近和几个朋友正在做一个应用，在部署的过程中又被自己坑了~所以今天准备总结一下，方便自己未来的部署之路，也方便Rails新手学习使用。

#####环境说明因为Linux的发型版太多，所以不能一一举例，经过自己的实践体验，发现Ubuntu可以更轻松的部署您的Rails App（个人看法，曾经在Centos下部署，遇到了好多坑）。所以该博文将基于以下的部署环境。

As configured in my dotfiles.

start new:

tmux

start new with session name:

	source 'https://rubygems.org'


	# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
	gem 'rails', '~> 5.0.0', '>= 5.0.0.1'
	# Use sqlite3 as the database for Active Record
	# Use Puma as the app server
	gem 'puma', '~> 3.0'
	# Use SCSS for stylesheets
	gem 'sass-rails', '~> 5.0'

	class Module
	def subclasses
	classes = []
	ObjectSpace.each_object do \|klass\|
	next unless Module === klass
	classes << klass if self > klass
	end
	classes
	end
	end

	require 'benchmark'
	arr = [0, 5, 13, 13, 30, 42, 52, 70, 85, 96, 103, 111, 116, 127, 130, 143, 150, 150, 161, 175, 207, 210, 218, 246, 257, 257, 263, 280, 304, 310, 326, 327, 332, 346, 360, 371, 374, 378, 406, 407, 407, 408, 428, 431, 437, 442, 445, 479, 489, 491, 505, 517, 520, 536, 548, 598, 602, 605, 618, 642, 649, 654, 659, 662, 677, 678, 682, 689, 695, 696, 697, 701, 711, 717, 727, 737, 745, 749, 754, 757, 770, 786, 802, 805, 814, 832, 840, 850, 853, 854, 888, 894, 904, 913, 913, 945, 962, 964, 972, 998]

	def binary_search(arr, element)
	l = 0
	r = arr.length - 1

	while l <= r

	mid = l + ((r - l) / 2)

	### Keybase proof

	I hereby claim:

	* I am cndaniel on github.
	* I am cndaniel (https://keybase.io/cndaniel) on keybase.
	* I have a public key ASDlRhMGDvyMlv3XtsL7mpwFRlqhMfq-VWboxBXOFNJKEQo

	To claim this, I am signing this object: