Skip to content

Instantly share code, notes, and snippets.

Harlow Ward harlow

Block or report user

Report or block harlow

Hide content and notifications from this user.

Learn more about blocking users

Contact Support about this user’s behavior.

Learn more about reporting abuse

Report abuse
View GitHub Profile
View issues_with_modules.md

My issues with Modules

In researching topics for RailsCasts I often read code in Rails and other gems. This is a great exercise to do. Not only will you pick up some coding tips, but it can help you better understand what makes code readable.

A common practice to organize code in gems is to divide it into modules. When this is done extensively I find it becomes very difficult to read. Before I explain further, a quick detour on instance_eval.

You can find instance_eval used in many DSLs: from routes to state machines. Here's an example from Thinking Sphinx.

class Article < ActiveRecord::Base
View 0000_packages.config
# Install Git needed for Git based gems
packages:
yum:
git: []
View config_for.rb
module YourApp
class Application < Rails::Application
# Convenience for loading config/foo.yml for the current Rails env.
#
# Example:
#
# config/cleversafe.yml:
#
# production:
# url: http://127.0.0.1:8080
View gist:bfe3820adca57f7c1808
class NotesController < ApplicationController
def create
@note = @project.notes.create params[:note].merge(
creator: current_user, subscribers: extract_subscribers(params[:note]))
@note.subscribers.each { |subscriber| Subscriptions.note(@note, subscriber).deliver }
end
end
class Subscriptions < ActionMailer::Base
View gist:a9667ac1309544d32461
# Bulk API design
#
# resources :posts
class PostsController < ActiveController::Base
# GET /posts/1,4,50,90
# post_url([ @post, @post ])
def show_many
@posts = Post.find(params[:ids])
end
View gist:b3d70d9bb5873838fdea
# autoload concerns
module YourApp
class Application < Rails::Application
config.autoload_paths += %W(
#{config.root}/app/controllers/concerns
#{config.root}/app/models/concerns
)
end
end
View reshaping_the_command_approach.rb
# MODEL
class Case < ActiveRecord::Base
include Eventable
has_many :tasks
concerning :Assignment do
def assign_to(new_owner:, details:)
transaction do
View varnish-jsonp.vcl
backend default {
.host = "127.0.0.1";
.port = "8000";
}
# We go BACK to varnish to get it to generate an ESI template that
# generates a JSON-P response.
backend jsonp_template_backend {
.host = "127.0.0.1";
.port = "8070";
View install-redis.sh
#!/bin/bash
# from here: http://www.codingsteps.com/install-redis-2-6-on-amazon-ec2-linux-ami-or-centos/
# and here: https://raw.github.com/gist/257849/9f1e627e0b7dbe68882fa2b7bdb1b2b263522004/redis-server
###############################################
# To use:
# wget https://raw.github.com/gist/2776679/04ca3bbb9f085b192f6aca945120fe12d59f15f9/install-redis.sh
# chmod 777 install-redis.sh
# ./install-redis.sh
###############################################
echo "*****************************************"
View hal.json
{
"_links": {
"self": { "href": "/orders" },
"next": { "href": "/orders?page=2" },
"find": { "href": "/orders{?id}", "templated": true }
},
"_embedded": {
"orders": [{
"_links": {
"self": { "href": "/orders/123" },
You can’t perform that action at this time.