geocodinglife

http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query
http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails

#payload: [{"kind"=>"person"}]
Segment.where("payload @> ?", [{kind: "person"}].to_json)

#data: {"interest"=>["music", "movies", "programming"]}
Segment.where("data @> ?",  {"interest": ["music", "movies", "programming"]}.to_json)
Segment.where("data #>> '{interest, 1}' = 'movies' ")
Segment.where("jsonb_array_length(data->'interest') > 1")

geocodinglife

Log

git config --global alias.lg "log --graph --abbrev-commit --decorate --format=format:'%C(bold blue)%h%C(reset) - %C(bold green)(%ar)%C(reset) %C(white)%s%C(reset) %C(dim white)- %an%C(reset)%C(bold yellow)%d%C(reset)' --all"

Status

git config --global alias.s status --short

Alternativa útil de status

git config --global alias.s status -sb

geocodinglife

Git Cheat Sheet

Basic commands

git init Creates a new git repository in the directory

git add <file name> Adds a specific file to staging

git add . or git add -A Adds the full directory and its contents to staging

geocodinglife

# State - allow an object to alter its behaviour when its internal state
# changes. The object will appear to change its class.

# Key idea - introduce an abstract class called SomethingState to represent the
# states of the object. Subclasses of the abstract class implement
# state-specific behaviour.

class Person
  attr_accessor :state, :name

geocodinglife

# The below script attempts to automate the character encoding challenges
# encountered with mysql, latin1 and UTF8
# http://www.bluebox.net/news/2009/07/mysql_encoding/

# ==============================================================================
# Copyright © 2013 University of Notre Dame
# Additional copyright may be held by others, as reflected in the commit history.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.

geocodinglife

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"

geocodinglife

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

geocodinglife

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

geocodinglife

class MyMailer < ApplicationMailer
  def send_invoice user, invoice
    @user = user
    @invoice = invoice
    invoice_attachment = WickedPdf.new.pdf_from_string(render_to_string(pdf: "invoice", template: 'payments/charges/invoice.pdf.erb'))
    attachments["I#{sprintf('%06d', @invoice.id)}.pdf"] = invoice_attachment
    mail(to: @user.email,
      subject: "Your invoice", template_path: 'users_mailer')
  end
end

geocodinglife

1. Get You a Hug, Every Friday

FridayHug.com http://fridayhug.com

2. Run From a Single File

The Smallest Rails App http://thesmallestrailsapp.com

%w(action_controller/railtie coderay).each &method(:require)