blackchestnut.github.io

Developer Notes

Contents

• GraphQL
• Ruby on Rails
  • Setup
  • Assets
  • Caching
  • Decorators
  • Elasticsearch
  • File Attachment Tools
  • Logging
  • Migrations
  • Sidekiq
  • Useful Code
  • Views
  • Rspec
  • Troubleshooting
• React Native
  • iOS
  • Android
• PostgreSQL
• Administration
  • Elasticsearch
  • Processes
  • Disk Space
  • Other
• Git
• Misc

GraphQL

• How to Retrieve a GraphQL Schema

Ruby on Rails

Setup

• Rails new app API only with PostgreSQL & rspec

Assets

• Custom fonts in Rails 5

Caching

• Disabling Caching in Tests

Decorators

• JSON fields in Disposable::Twin

Elasticsearch

• Chewy

File Attachment Tools

• Shrine
• Shrine direct uploads to s3
• Shrine direct uploads to s3 (has_many)

Logging

• Disable Rails SQL logging in console

Migrations

• References with alias name

Sidekiq

• Delete jobs
• Reschedule jobs

Useful Code

• ApplicationHelper and layouts/application
• Service
• Simple authentication with password
• Parse time in a different time zone and convert to current time zone

Views

• Enum humanized keys in select
• Form field with errors
• Pass array of objects via QueryString or Forms

Rspec

• Ignore some specs on CI

Troubleshooting

• Array values in the parameter to Gem.paths= are deprecated

React Native

iOS

• Troubleshooting
  • third-party: 'config.h' file not found

Android

• Build

  • Build signed apk for release
  • Build unsigned apk for device without the development server

• Emulator

  • Paste text on Android Emulator

• Troubleshooting

  • Android release APK, build error third-party/glog-0.3.4/test-driver
  • Confirm license for package Android SDK Build-Tools
  • Execution failed for task ':app:dexDebug'

PostgreSQL

• General Table Size Information
• Simple pg backup
• Upgrade PostgreSQL 9.3 on OS X
• List tables by their size in PostgreSQL database

Administration

Elasticsearch Tips

• Elasticsearch
• Elasticsearch Index errors:FORBIDDEN index read-only

Processes

• Kill processes running in background

Disk Space

• To Add Swap on Ubuntu 14.04
• Find and remove large junk files from the server
• journalctl disk usage

Other

• Install Dropbox Client as a Service on Ubuntu 14.04
• SSL certificate
• GNU Screen
• WireGuard

Git

• Keeping a fork up to date

Misc

• macOS Catalina 10.15
• brew upgrade macvim
• Creating Windows bootable USB in MacOS
• Number of lines in the project source files