onesup/ror-class.md

## ror-class.md

      
    Raw
  

              ror-class.md
            
          
    puts 'Hello Ruby on Rails World'


발표자료 공유

[fit] bit.ly/ror-class-md


[fit] 발표자료는 MarkDown 문서 형태입니다.


Marp
https://yhatt.github.io/marp/
Deckset
http://www.decksetapp.com/


수업준비


슬랙 가입
깃헙 가입
클라우드9 가입


dffdf.slack.com

이메일 제출 주소
http://bit.ly/ror-class-email

루비 온 레일스

최신버전 5.0
교재는 4.2 버전
[fit] 오늘 내일 수업 수준에서는

[fit] 크게 차이 없습니다.


루비 온 레일스 쓰는 서비스


카카오


프로젝트 초반에 쓴다고 합니다.
카카오스토리도 초기에는 RoR로 만들었다고 합니다.


루비 온 레일스 쓰는 서비스


트위터


여기도 초반에는 RoR 로 만들었다고 합니다.
프로토타이핑 전문?


루비 온 레일스 쓰는 서비스


쿡패드


5576만명 가입·230만개의 요리법…
日인구 절반 즐겨찾는 레시피 사이트


“음식으로 세계인 미소 늘리겠다”
창업주 사노 아키미츠의 철학 실천
창업 20년, 시총 2조4000억원 서비스로

기사전문
^ 카카오가 5.7조

루비 온 레일스 쓰는 서비스


그밖에 AirBnB, 깃허브 등등
https://www.netguru.co/blog/top-10-sites-built-with-ruby-on-rails-2016


한국 서비스
http://world.rorlab.org/


RoR 창시자

DHH
데이비드 하이네마이어 핸슨
David Heinemeier Hansson
http://dareyourself.net/2641


Ruby 창시자

Matz
마츠모토 유키히로
松本行弘
http://www.bloter.net/archives/184564


Ruby 창시자

Matz 와 나

강사 페이스북
https://www.facebook.com/onesup


클라우드9으로 개발환경 세팅

c9.io

Ruby 기초 문법 실습

https://www.ruby-lang.org/ko/documentation/quickstart/

MVC 구조 설명 및 스캐폴딩으로 Hello world 찍어보기


MVC?

모델과 컨트롤러의 분리

성적표 프로그램

http://bit.ly/2eUxUGC

성적표 개발자의 욕망

일을 쪼개고 싶다.
-> 단순 업무는 알바 시키고 싶다.

model

Fat model
^ 랭킹 모델

controller

Thin Controller

view

html.erb

매번 나누는거 귀찮다.

패턴을 적용한 프레임워크
#[fit] 그게 rails

rails project 생성

rails new my_app

convention over configuration

설정보다 관례
http://rubyonrails.org/doctrine/#convention-over-configuration

rails 관례

독특함보다는 표준
gem 도 많이 쓰는 gem 을 더 많이 쓰는 경향
DRY - Don't repeat yourself. 복붙 금지

scaffold 정리

scaffold 가이드
rails scaffold 모델명(resource) 컬럼:type 컬럼:type
rails scaffold User name:string age:integer


scaffold 실행 뒤엔 db/migrate 파일을 확인 후
rake db:migrate 실행
rake 실행 후에는 서버 재시작 해야 함

rails g migration add_telephone_to_users telephone:string


관례 사례


단수와 복수 구분
리소스별로 model view controller 이름 통일
기타등등

https://gist.github.com/iangreenleaf/b206d09c587e8fc6399e

액티브 레코드 Association 소개하기

belongs_to
has_many
has_many through


액티브 레코드 메소드

resource.all
resource.children_resources
resource.children_resources << children_resources
resource.children_resources.destroy_all


액티브 레코드 관계 설정 가이드

http://guides.rubyonrails.org/association_basics.html#has-many-association-reference

모델 생성해서 사용자 입력 데이터를 DB 에 입력하기

rails g scaffold provider name email
rails g scaffold user name email
rails g model order user:references product:references
rails g scaffold products name provider:references price


관리자모드 gem 붙여보기

ActiveAdmin
gem 'activeadmin', '~> 1.0.0.pre4'
gem 'inherited_resources', git: 'https://github.com/activeadmin/inherited_resources.git'

http://activeadmin.info

gem 인기순위

www.ruby-toolbox.com

Route 개념 소개

http://guides.rorlab.org/routing.html

rest 개념 소개

CRUD: Create Read Update Delete
CRUD -> Create Get Put Delete


Day 1 final

상품 등록 DB 테이블 만들어보기


이미지 업로드

gem 'carrierwave', '>= 1.0.0.rc', '< 2.0'
gem 'carrierwave-imageoptimizer', git: 'https://github.com/zaiste/carrierwave-imageoptimizer.git'
gem 'mini_magick'


product scaffold

rails migration add_contents_image_to_products contents_image


product model

mount_uploader :contents_image, ContentsImageUploader


uploader input

https://gist.github.com/onesup/03892e6947cd16646754aa00b0d40b39#file-uploader_input-rb

product admin

image_preview = -> {
      if f.object.contents_image.present?
        image_tag(f.object.contents_image.url)
      else
        content_tag(:span, "no thumbnail image yet")
      end
    }

f.input :contents_image, as: :uploader, hint: image_preview.call(), removable: false

row :contents_thumbnail do img src: item.contents_thumbnail, height: 200


ruby lambda

동적인 parameter 를 함수에 전달 할 때 사용
자세한 설명
http://blog.nacyot.com/articles/2015-12-07-ruby-proc-and-lambda/

  
## uploader_input.rb
# A formtastic input which incorporates carrierwave uploader functionality.
#
# Intelligently adds the cache field, displays and links to the current
# value if there is one, adds a class to the wrapper when replacing an
# existing value, allows removing an existing value with the checkbox
# taking into account validation requirements.
#
# There are several options:
#
#  * Toggle the replacement field with `replaceable: true/false`.
#  * The replace file label is translatable as `replace_label` or using option `replace_label: "value"` (like `label`).
#  * Toggle the remove checkbox with `removable: true/false` (`true` overrides `required`).
#  * The remove checkbox label is translatable as `remove_label` or using option `remove_label: "value"` (like `label`).
#  * Override existing file display and links using `existing_html` and `existing_link_html` (like `wrapper_html`).
#
# Example: `form.input :file, as: "uploader"`
#
# Copyright (c) Samuel Cochran 2012, under the [MIT license](http://www.opensource.org/licenses/mit-license).
class UploaderInput < Formtastic::Inputs::FileInput
  def linkable?
    options[:linkable] != false
  end

  def replaceable?
    options[:replaceable] != false
  end

  def removable?
    options[:removable] != false and (options[:removable] == true or not required?)
  end

  def method_present?
    if object.respond_to?("#{method}?")
      object.send("#{method}?")
    else
      object.send(method).present?
    end
  end

  def method_changed?
    if object.respond_to? "#{method}_changed?"
      object.send "#{method}_changed?"
    else
      false
    end
  end

  def method_was_present?
    if not method_changed?
      method_present?
    else
      object.send("#{method}_was").present?
    end
  end

  def wrapper_html_options
    super.tap do |options|
      options[:class] << " replaceable" if replaceable?
      options[:class] << " removable" if removable?
      options[:class] << " present" if method_present?
      options[:class] << " changed" if method_changed?
      options[:class] << " was_present" if method_was_present?
    end
  end

  def cache_html
    if method_changed?
      builder.hidden_field("#{method}_cache")
    end or "".html_safe
  end

  def file_html
    builder.file_field(method, input_html_options)
  end

  def existing_html_options
    expand_html_options(options[:existing_html]) do |opts|
      opts[:class] << "existing"
    end
  end

  def existing_link_html_options
    expand_html_options(options[:existing_link_html]) do |opts|
      opts[:class] << "existing"
    end
  end

  def existing_html
    if method_present?
      # TODO: Add classes based on mime type for icons, etc.
      existing = template.content_tag(:span, object.send(method).file.filename, existing_html_options)
      template.link_to_if linkable?, existing, object.send(method).url, existing_link_html_options
    end or "".html_safe
  end

  def replace_label_html
    template.content_tag(:label, class: "replace_label") do
      template.content_tag(:span, localized_string(method, "Replace #{method.to_s.titleize}", :replace_label))
    end
  end

  def replace_html
    if replaceable?
      replace_label_html <<
          file_html
    end or "".html_safe
  end

  def remove_html
    if removable?
      template.content_tag(:label, class: "remove_label") do
        template.check_box_tag("#{object_name}[remove_#{method}]", "1", false, id: "#{sanitized_object_name}_remove_#{sanitized_method_name}") <<
            # XXX: There are probably better ways to do these translations using defaults.
            template.content_tag(:span, localized_string(method, "Remove #{method.to_s.titleize}", :remove_label))
      end
    end or "".html_safe
  end

  def to_html
    input_wrapping do
      label_html <<
          cache_html <<
          if method_was_present?
            existing_html <<
                replace_html <<
                remove_html
          else
            existing_html <<
                file_html
          end
    end
  end

  protected

  def expand_html_options opts
    (opts || {}).dup.tap do |opts|
      opts[:class] =
          case opts[:class]
            when Array
              opts[:class].dup
            when nil
              []
            else
              [opts[:class].to_s]
          end
      opts[:data] =
          case opts[:data]
            when Hash
              opts[:data].dup
            when nil
              {}
            else
              {"" => opts[:data].to_s}
          end

      yield opts if block_given?

      opts[:class] = opts[:class].join(' ')
    end
  end
end
	# A formtastic input which incorporates carrierwave uploader functionality.
	#
	# Intelligently adds the cache field, displays and links to the current
	# value if there is one, adds a class to the wrapper when replacing an
	# existing value, allows removing an existing value with the checkbox
	# taking into account validation requirements.
	#
	# There are several options:
	#
	# * Toggle the replacement field with `replaceable: true/false`.
	# * The replace file label is translatable as `replace_label` or using option `replace_label: "value"` (like `label`).
	# * Toggle the remove checkbox with `removable: true/false` (`true` overrides `required`).
	# * The remove checkbox label is translatable as `remove_label` or using option `remove_label: "value"` (like `label`).
	# * Override existing file display and links using `existing_html` and `existing_link_html` (like `wrapper_html`).
	#
	# Example: `form.input :file, as: "uploader"`
	#
	# Copyright (c) Samuel Cochran 2012, under the [MIT license](http://www.opensource.org/licenses/mit-license).
	class UploaderInput < Formtastic::Inputs::FileInput
	def linkable?
	options[:linkable] != false
	end

	def replaceable?
	options[:replaceable] != false
	end

	def removable?
	options[:removable] != false and (options[:removable] == true or not required?)
	end

	def method_present?
	if object.respond_to?("#{method}?")
	object.send("#{method}?")
	else
	object.send(method).present?
	end
	end

	def method_changed?
	if object.respond_to? "#{method}_changed?"
	object.send "#{method}_changed?"
	else
	false
	end
	end

	def method_was_present?
	if not method_changed?
	method_present?
	else
	object.send("#{method}_was").present?
	end
	end

	def wrapper_html_options
	super.tap do \|options\|
	options[:class] << " replaceable" if replaceable?
	options[:class] << " removable" if removable?
	options[:class] << " present" if method_present?
	options[:class] << " changed" if method_changed?
	options[:class] << " was_present" if method_was_present?
	end
	end

	def cache_html
	if method_changed?
	builder.hidden_field("#{method}_cache")
	end or "".html_safe
	end

	def file_html
	builder.file_field(method, input_html_options)
	end

	def existing_html_options
	expand_html_options(options[:existing_html]) do \|opts\|
	opts[:class] << "existing"
	end
	end

	def existing_link_html_options
	expand_html_options(options[:existing_link_html]) do \|opts\|
	opts[:class] << "existing"
	end
	end

	def existing_html
	if method_present?
	# TODO: Add classes based on mime type for icons, etc.
	existing = template.content_tag(:span, object.send(method).file.filename, existing_html_options)
	template.link_to_if linkable?, existing, object.send(method).url, existing_link_html_options
	end or "".html_safe
	end

	def replace_label_html
	template.content_tag(:label, class: "replace_label") do
	template.content_tag(:span, localized_string(method, "Replace #{method.to_s.titleize}", :replace_label))
	end
	end

	def replace_html
	if replaceable?
	replace_label_html <<
	file_html
	end or "".html_safe
	end

	def remove_html
	if removable?
	template.content_tag(:label, class: "remove_label") do
	template.check_box_tag("#{object_name}[remove_#{method}]", "1", false, id: "#{sanitized_object_name}_remove_#{sanitized_method_name}") <<
	# XXX: There are probably better ways to do these translations using defaults.
	template.content_tag(:span, localized_string(method, "Remove #{method.to_s.titleize}", :remove_label))
	end
	end or "".html_safe
	end

	def to_html
	input_wrapping do
	label_html <<
	cache_html <<
	if method_was_present?
	existing_html <<
	replace_html <<
	remove_html
	else
	existing_html <<
	file_html
	end
	end
	end

	protected

	def expand_html_options opts
	(opts \|\| {}).dup.tap do \|opts\|
	opts[:class] =
	case opts[:class]
	when Array
	opts[:class].dup
	when nil
	[]
	else
	[opts[:class].to_s]
	end
	opts[:data] =
	case opts[:data]
	when Hash
	opts[:data].dup
	when nil
	{}
	else
	{"" => opts[:data].to_s}
	end

	yield opts if block_given?

	opts[:class] = opts[:class].join(' ')
	end
	end
	end