DEV Community: wusher

Feature Flags On Rails Routes

wusher — Sun, 04 Sep 2022 08:01:01 +0000

Found a tweet explaining how to wrap a rails route with a feature flag.

resources :media,
      constraints: ->(req) do
                     current_user = req.env["warden"].user(:user)
                     Flipper.enabled?(:media_uploads, current_user)
                   end

Source: https://twitter.com/carbon\_noreply/status/1565244390666252288

Active Storage Variants Failing Locally

wusher — Fri, 02 Sep 2022 09:01:01 +0000

Setup

ruby 3.0.4p208
puma 5.6.1
Rails 7.0.2
macos 12.4 m1 #### Issue

I kept getting broken images when generating variants locally. I found the error below in my rails logs.

Error

[__NSCFConstantString initialize] may have been in progress in another thread when fork() was called
[__NSCFConstantString initialize] may have been in progress in another thread when fork() was called

Fix

I had to add this to my zshrc before I initialize rbenv

export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES

File Uploads Without Form Helpers

wusher — Fri, 02 Sep 2022 08:01:01 +0000

When uploading files without using the form helper form.file_field, you have to add the option multipart: true to the form tag.

Discovered in API Docs

  < %= form_with(model: @company), multipart: true) do |form| %>

    -- When using: --
    <input type="file" name="company[logo]" />
    -- OR --
    < %= file_field_tag "company[logo]" %>

    < %= form.submit %>
  < % end %>

Unregister Service Workers

wusher — Thu, 01 Sep 2022 08:01:01 +0000

A little bit of code to unregister all service workers:

if (navigator.serviceWorker) {
  navigator.serviceWorker.getRegistrations().then(function (registrations) {
    for (let registration of registrations) {
      registration.unregister();
    }
  });
}

Inline Bundler Without Gemfile

wusher — Thu, 01 Sep 2022 08:01:01 +0000

For quick throwaway ruby scripts, you can add your gemfile inline. When you run the file, ruby will install your dependencies and then execute the script.

Inline bundler

# BEGIN inline bundler 
require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'

  gem 'httparty'
  gem 'pry'
end
# END inline bundler 

resp = HTTParty.get "https://rubygems.org"
binding.pry

Running

> ruby tmp.rb 

From: /Users/user/code/tmp.rb:11 :

     6: gem 'httparty'
     7: gem 'pry'
     8: end
     9: 
    10: resp = HTTParty.get "https://rubygems.org"
 => 11: binding.pry 

[1] pry(main)>

Uninstall All Bundled Gems

wusher — Thu, 01 Sep 2022 08:01:01 +0000

I came across a quick way to delete all the gems installed through bundler. source

bundle list | ruby -e 'ARGF.readlines[1..-1].each {|l| g = l.split(" "); puts "Removing #{g[1]}"; `gem uninstall --force #{g[1]} -v #{g[2].gsub(/\(|\)/, "")}`; }'

Line by line version

bundle list 
ruby -e '
  ARGF.readlines[1..-1].each {|l| g = l.split(" ")
  puts "Removing #{g[1]}"
  `gem uninstall --force #{g[1]} -v #{g[2].gsub(/\(|\)/, "")}`
}'

Signout Users

wusher — Thu, 01 Sep 2022 08:01:01 +0000

Code to logout deactivated users:

if current_user&.deactivated_at
  email = current_user.email
  sign_out current_user
  redirect_to root_path, alert: "Your account has been deactivated. Account: #{email} "
end

Makefile Help

wusher — Wed, 31 Aug 2022 08:01:01 +0000

Not sure where I picked this up, but I always add a help command to my make files:

Skeleton File

.PHONY: clean help lint setup start test

help: ## shows the help
    @grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'

clean: ## clean the project
  echo TODO 

lint: ## lint codebase
  echo TODO 

setup: ## install all deps and configure project
  echo TODO 

start: ## compile and run the server 
  echo TODO 

test: ## run the tests 
  echo TODO

Output

> make 
clean clean the project
help shows the help
lint lint codebase
setup install all deps and configure project
start compile and run the server 
test run the tests