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PSQL

Magic words:

psql -U postgres

If run with -E flag, it will describe the underlaying queries of the \ commands (cool for learning!).

Most \d commands support additional param of __schema__.name__ and accept wildcards like *.*

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Docker Commands, Help & Tips

Show commands & management commands

$ docker

Docker version info

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var OFF = 0, WARN = 1, ERROR = 2;

module.exports = exports = {
    "env": {
        "es6": true
    },

    "ecmaFeatures": {
        // env=es6 doesn't include modules, which we are using
        "modules": true

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1. Add gem 'rails_12factor' to your Gemfile. This will add error logging and the ability for your app to serve static assets.
2. bundle
3. Run RAILS_ENV=production rake db:create db:migrate db:seed
4. Run rake secret and copy the output
5. From the command line: export SECRET_KEY_BASE=output-of-rake-secret
6. To precompile your assets, run rake assets:precompile. This will create a folder public/assets that contains all of your assets.
7. Run RAILS_ENV=production rails s and you should see your app.

Remember to clobber your assets (rake assets:clobber) and re-precompile (rake assets:precompile) if you make changes.

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VSCode - ESLint, Prettier & Airbnb Setup

1. Install ESLint & Prettier extensions for VSCode

Optional - Set format on save and any global prettier options

2. Install Packages

npm i -D eslint prettier eslint-plugin-prettier eslint-config-prettier eslint-plugin-node eslint-config-node

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MongoDB Cheat Sheet

Show All Databases

show dbs

Show Current Database

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### DigitalOcean Ubuntu 18.04 x64 + Rails 5 + Nginx + Unicorn + PostgreSQL9.6 + Capistrano 3

SSH into Root

    $ ssh root@123.123.123.123

Change Root Password

    $ passwd

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Integrate Gem/Engine and main Rails app

Overview

• Paths
• Routes
• Add functionality to controller
• Improving (Extending or overriding) Engine functionality
• Helpers
• Assets