7vs

Shopify Upgrow

Ruby on Rails is the framework of choice for web apps at Shopify. It is an opinionated stack for quick and easy development of apps that need standard persistence with relational databases, an HTTP server, and HTML views.

By design, Rails does not define conventions for structuring business logic and domain-specific code, leaving developers to define their own architecture and best practices for a sustainable codebase.

In fast product development teams, budgets and deadlines interfere with this architectural work, leading to poorly written business logic and complicated code that is very hard to maintain long term. Even when developer teams take the time to think about what a good architecture in Rails look like, this work is likely required to be done all over again when a new Rails app needs to be created.

This project aims to make it easier for both new and existing Rails apps to adopt patterns that are proven to make code more sustainable long term, and codebases easier to maintain an

7vs

#user  nobody;
#Defines which Linux system user will own and run the Nginx server

worker_processes  1;
#Referes to single threaded process. Generally set to be equal to the number of CPUs or cores.

#error_log  logs/error.log; #error_log  logs/error.log  notice;
#Specifies the file where server logs. 

7vs

Introductory resources

• High level overview https://yogthos.github.io/ClojureDistilled.html
• Interactive exercises http://clojurescriptkoans.com/
• Community-powered Clojure courses https://clojurecademy.com/
• Interactive book https://www.maria.cloud/
• Interactive workbook http://viewer.gorilla-repl.org/view.html?source=github&user=lspector&repo=clojinc&path=worksheet.clj
• Clojure workshop https://github.com/friemen/cugb/blob/master/kickstart.md
• Clojure style guide https://github.com/bbatsov/clojure-style-guide
• core functions explained visually http://blog.josephwilk.net/clojure/functions-explained-through-patterns.html

7vs

Preamble

On OS/X Sierra, after recently running a brew update I started receiving the error message Sorry, you can't use byebug without Readline when trying to run some rake tasks in my ruby project folder. I observed this in projects and gems that include byebug or pry in their Gemfile or gem.spec. I've found in my googling that many begin encountering this error message after running a brew update but there are other triggering conditions as well.

>> rake aws:show_config
WARN: Unresolved specs during Gem::Specification.reset:
      mime-types (>= 0)
WARN: Clearing out unresolved specs.
Please report a bug if this causes problems.
 Sorry, you can't use byebug without Readline. To solve this, you need to

7vs

#!/bin/bash
# node-reinstall
# credit: http://stackoverflow.com/a/11178106/2083544

## program version
VERSION="0.0.13"

## path prefix
PREFIX="${PREFIX:-/usr/local}"

7vs

# `have_attr_reader` matcher for attr_reader
RSpec::Matchers.define :have_attr_reader do |field|
  match do |object_instance|
    object_instance.respond_to?(field)
  end

  failure_message do |object_instance|
    "expected attr_reader for #{ field } on #{ object_instance }"
  end

7vs

Capybara Actions

# Anchor
click_link 'Save'

# Button
click_button 'awesome'

# Both above

7vs

Pipelines

Many Pipelines operations can be performed via the CLI, which requires the Pipelines plugin for the Heroku Toolbelt. To install:

% heroku plugins:install heroku-pipelines
% heroku help pipelines

% heroku apps:create une-pipe-staging

7vs

After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."

Database files have to be updated before starting the server, here are the steps that had to be followed:

# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
brew unlink postgresql
brew install [email protected]
brew unlink [email protected]
brew link postgresql

7vs

<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
    <CORSRule>
        <AllowedOrigin>https://yourdomainname.herokuapp.com</AllowedOrigin>
        <AllowedOrigin>http://yourdomainname.herokuapp.com</AllowedOrigin>
        <AllowedMethod>GET</AllowedMethod>
        <AllowedMethod>HEAD</AllowedMethod>
        <AllowedMethod>DELETE</AllowedMethod>
        <AllowedMethod>PUT</AllowedMethod>
        <AllowedMethod>POST</AllowedMethod>