Railscheatsheet

RUBY
复制代码
class ApplicationController
  helper_method :logged_in?
  def logged_in?
    "Something"
  end
end

RUBY
复制代码
# http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html
- form_for @person do |f|
  = f.label :first_name
  = f.label :first_name, "First name"
  = f.text_field :first_name
  = f.label :last_name>
  = f.text_field :last_name>
  - fields_for @person.permission do |fields|
    = fields.checkbox :admin
  -# name="person[admin]"
  - fields_for :person, @client do |fields|
    = fields.checkbox :admin
  = f.submit
# 还有: check_box, email_field, fields_for
# file_field, hidden_field, label, number_field, password_field
# radio_button, range_field, search_field, telephonen_field,
# text_area, text_field, url_field

RUBY
复制代码
stylesheet_link_tag :monkey
javascript_link_tag :monkey

RUBY
复制代码
class ProjectsController
  layout 'project'   # 默认 layout 名称与 project 名称相同
  def save
  end
  def edit
  end
end

RUBY
复制代码
class ApplicationController < ActionController::Base
  before_filter :validate, only: [:save, :edit]
  before_filter :ensure_auth, except: [:logout]
  before_filter :require_login
  private
  def require_login
    unless logged_in?
      flash[:error] = "You must be logged in to access this section"
      redirect_to new_login_url
    end
  end
end

RUBY
复制代码
class ApplicationController < ActionController::Base
  def default_url_options(options)
  end
end

RUBY
复制代码
session[:what]
flash[:notice] = "Your session expired"
params[:id]

RUBY
复制代码
class UsersController < ApplicationController
  def index
    @users = User.all
    respond_to do |format|
      format.html # index.html.erb
      format.xml  { render :xml => @users}
      format.json { render :json => @users}
    end
  end
end

RUBY
复制代码
redirect_to action: 'show', id: @entry.id
redirect_to root_url

RUBY
复制代码
render nothing: true
render template: 'products/show'
render status: 500
render status: :forbidden
render text: '...'
render layout: 'special_layout'
render layout: false
render action: 'something'
render json: object
render xml: object
render location: photo_url(photo)

RUBY
复制代码
head :bad_request
head :created, location: photo_path(@photo)