rails quick dev

rails.sh

# xcode 5.1 error when install thrift
bundle config build.thrift --with-cppflags='-D_FORTIFY_SOURCE=0'

# When debugging in ruby 2.1.0
# error: cannot find vm_core.h
# we have to downgrade to ruby 2.0.0 
# to start using -> ruby-debug-ide 

# Nokogiri and libxml
# Reason: Incompatible library version: nokogiri.bundle requires version 11.0.0 or later, 
# but libxml2.2.dylib provides version 10.0.0
http://nokogiri.org/tutorials/installing_nokogiri.html
gem install nokogiri -v '1.6.1' -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/libxml2


# problems installing rmagick gem
C_INCLUDE_PATH=/usr/local/Cellar/imagemagick/6.8.9-1/include
PKG_CONFIG_PATH=/usr/local/lib/pkgconfig/
# then
gem install rmagick

# create skeleton rails app current dir
rails new .

# after gem "active_model_serializers"
# run
rails g serializer user

# mocking using mocha gem
sheets = mock()
sheets.stubs(:first).returns(1)
Roo::Base.any_instance.stubs(:sheets).returns(sheets)

# list available rake tasks
rake --tasks

# change locale
I18n.locale = 'en'

# searchkick
Product.reindex

# rake tasks, passing strings
rake seeds:organization['cool_org']
heroku run rake seeds:user[1,'3890@gmail.com','3890@gmail.com',45996130,'ttt','sss','',24]

# searchkick
class Item
  def search_data
    {user_ids: users.pluck(:id)}
  end
end
Item.search "Foo", where: {user_ids: 1}

class Project < ActiveRecord::Base
  def search_data
    attributes.merge(
      categories_title: categories.map(&:title)
    )
  end
end
search = Project.search 'something', facets: [:categories_title]

User.find(:all, limit: 10,
            joins:  "LEFT JOIN `user_points` ON user_points.user_id = users.id" ,
            select: "users.*, count(user_points.id)", 
            group:  "user_points.user_id")

# factory girl
FactoryGirl.create_list(:employee, 10, organization_id: 3)

# format tables in rails console
gem install 'hirb'
Hirb::View.enable

# rspec let, context
# describe for things, context for states
# describe '#matriculate' => thing
# context 'when the student is ....' => state

# befor for actions, let for instance variables

# loading external files to controllers
# app/services are loaded
# for custom
config.autoload_paths += Dir["#{Rails.root}/lib"]


# devise
# after gem 'devise'
rails generate devise:install
rails generate devise User
rake db:migrate

# we need to create this file in order to let rspec know about devise
spec/support/devise.rb
# then add this code to devise.rb
RSpec.configure do |config|
  config.include Devise::TestHelpers, :type => :controller
end

# custom name reference models
belongs_to :reply_to_user, class_name: "User"

# console
# create user via rails console
User.create!({email: 'rr@gmail.comm', password: '123456789', password_confirmation: '123456789'})

# table schema sqlite
PRAGMA table_info(users);

# clear tmp
rake tmp:clear

# undo last migration
rake db:rollback

# undo to specific migration
rake db:migrate:down version=847583457438957

# create tables and databases
rake db:setup

# migrations
rails generate migration CreateUploads

# polymorphic associations
t.references :commentable, polymorphic: true
# or
t.integer :commentable_id
t.string :commentable_type


# run dev migrations 
rake db:migrate RAILS_ENV=development

# after installing 'rspec-rails' gem
rails generate rspec:install

# to run rspec tests
rspec

# run migrations for tests
rake db:migrate RAILS_ENV=test

# debugging
require 'debugger'; debugger

# set resource response json as default
resources :posts, defaults: {format: :json}

# run tests
rake test

# list all gems in current gemset
gem list

# ignore documentation, takes to long! and dash rocks ;)
gem install --no-document
# list all gemsets and current gemset will be highlighted

# set default rvm
rvm use ruby-2.1.0 --default

# rename gemset
rvm gemset rename old_name new_name

# delete gemset
rvm gemset delete gemset_name

# list all gemsets
rvm gemset list

# list all installed rubies
rvm list

# list all rubies that could be installed
rvm list known

# create and set the ruby version you will use, also creates the hidden files that set it.
rvm use ruby-2.0.0-p353@rails_angularjs_demo --create --ruby-version

# if latest version of ruby is not listed 
rvm get stable

#
rails generate scaffold Post title:string body:string
rake db:migrate

# ignoring files
.DS_Store
.idea/
rails_angularjs_demo.iml
.ruby-version
.ruby-gemset

# ParameterMissing, validation errors.
rescue_from(ActionController::ParameterMissing) do |parameter_missing_exception|
  error = {}
  error[parameter_missing_exception.param] = ['parameter is required']
  response = { errors: [error] }
  render json: response, status: :unprocessable_entity
end

# enable cors
gem 'rack-cors'
config.middleware.insert_before Warden::Manager, Rack::Cors do
  allow do
    origins '*'
    resource '*', :headers => :any, :methods => [:get, :post, :put, :delete, :options]
  end
end

# testing api with chrome rest client
{
  "user":{
    "email": "r@gmail.comm",
    "password": "123456"
  }
}

# testing custom sessions controller
before(:each) do
  @request.env["devise.mapping"] = Devise.mappings[:user]
end

# faster tests with spring
gem 'spring'
gem 'spring-commands-rspec'
bundle exec spring binstub --all
spring binstub --all
spring rspec
spring status
spring stop

# transactions
Employee.transaction do
  risk_insurance = employee.risk_insurance
  if risk_insurance.present? && params.require(:employee).has_key?(:risk_insurance)
    unless risk_insurance.update(risk_insurance_params)
      errors << {risk_insurance: risk_insurance.errors.full_messages}
      raise ActiveRecord::Rollback.new
    end
  end

  medical_exam = employee.medical_exam
  if medical_exam.present? && params.require(:employee).has_key?(:medical_exam)
    unless medical_exam.update(medical_exam_params)
      errors << {medical_exam: medical_exam.errors.full_messages}
      raise ActiveRecord::Rollback.new
    end
  end
end