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Building Extensions - best practises
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Peter Berkenbosch
February 27, 2014
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Building Extensions - best practises
SpreeConf 2014 Lightning talk.
Peter Berkenbosch
February 27, 2014
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Transcript
Building Extensions best practises ! Peter Berkenbosch
Unix philosophy building short, simple, clear, modular, and extendable code
that can be easily maintained and repurposed by developers other than its creators.
Documentation
Modular
OOP
Extension as “Model”
Models Views Controllers Assets Overrides Rails::Engine Spree other 3rd party
gems extension
Looks familier! Rails anyone?!
Outside In
Models Views Controllers Assets Overrides Rails::Engine Spree other 3rd party
gems extension
Test the “interface” can be just an API
Drives Quality
Self documenting
gem install spree_cmd
spree extension
git clone spree
rake sandbox
spree extension
module SpreeSales! class Engine < Rails::Engine! require 'spree/core'! isolate_namespace Spree!
engine_name 'spree_sales'! ! # use rspec for tests! config.generators do |g|! g.test_framework :rspec! end! ! def self.activate! Dir.glob(File.join(File.dirname(__FILE__), '../../app/**/*_decorator*.rb')) do |c|! Rails.configuration.cache_classes ? require(c) : load(c)! end! end! ! config.to_prepare &method(:activate).to_proc! end! end
Spree Testing Support
Usual suspect rspec capybara factory_girl
# Requires factories defined in spree_core! require 'spree/testing_support/factories'! require 'spree/testing_support/controller_requests'!
require 'spree/testing_support/authorization_helpers'! require 'spree/testing_support/url_helpers'
Red - Green - Refacor Repeat
Nothing new. TDD / BDD …
Extending Spree
class_evil Looking at adding durable_decorator
Deface for small changes
override view file for the more complex customisations
Deface-able views ! for easy overriding the overrides.
github.com/spree/spree_ Inspiration and collaboration!