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Rails Migration Cheat Sheet

rails generate migration

rails g migration add_x_column_to_y_table name:type name2:type2[:index]

rails g migration create_x_table name:type

Columns

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build.gradle

apply from: 'functions.gradle'

...

buildConfigField 'String', 'GIT_HASH', "\"${gitHash()}\""
buildConfigField 'String', 'BUILD_TIME', "\"${buildTime()}\""

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val foobar: Foobar? = ...

foobar?.let { /* foobar is not null */ } ?: run { /* foobar is null */ }

// this might be cool except for the back ticks `

fun <T, R> T.`else`(block: T.() -> R) = run(block)

foobar?.let { /* foobar is not null */ } ?: `else` { /* foobar is null */ }

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# make CapsLock behave like Ctrl:
setxkbmap -option ctrl:nocaps

# make short-pressed Ctrl behave like Escape:
xcape -e 'Control_L=Escape'

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wget https://dl.pstmn.io/download/latest/linux64 -O postman.tar.gz
sudo tar -xzf postman.tar.gz -C /opt
rm postman.tar.gz
sudo ln -sf /opt/Postman/Postman /usr/bin/postman

cat > ~/.local/share/applications/postman.desktop <<EOL
[Desktop Entry]
Encoding=UTF-8
Name=Postman
Exec=postman

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bind R source-file ~/.tmux/reload.tmux

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Adb

sudo apt remove adb

Add the following to ~/.bashrc

export ANDROID_SDK_ROOT=$HOME/Android/Sdk
export PATH=$PATH:$ANDROID_SDK_ROOT/platform-tools
export PATH=$PATH:$ANDROID_SDK_ROOT/tools

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rails g controller api/v6/controller_name create --no-helper --skip-template-engine --skip-routes
mkdir spec/requests/api/v6/controller_name
mv spec/controllers/api/v6/controller_name.rb spec/requests/api/v6/controller_name/

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# Enables mouse
set -g mouse

set-window-option -g mode-keys vi

# CPU Status
set -g status-interval 1 # second
set -g status-right "#{prefix_highlight} CPU: #{cpu_icon} #{cpu_percentage} | %a %h-%d %H:%M "

# Sync Panes Status

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require 'cgi'
require 'json'
require 'active_support'

def verify_and_decrypt_session_cookie(cookie, secret_key_base)
  cookie = CGI::unescape(cookie)
  salt         = 'encrypted cookie'
  signed_salt  = 'signed encrypted cookie'
  key_generator = ActiveSupport::KeyGenerator.new(secret_key_base, iterations: 1000)
  secret = key_generator.generate_key(salt)[0, ActiveSupport::MessageEncryptor.key_len]