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How to Explore a Large Rails Application Nikolay Bienko, AT Consulting @bikolyarb [email protected]

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Plan UI Traversing & Domain knowledge Get the app up and running Estimate codebase Check out primary entities ApplicationController Follow main use cases POROs and pattern objects

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UI Traversing & Domain knowledge Explore what is your app about Documentation Grasp domain knowledge

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Get the app up and running Make tests green bin/setup rake --tasks routes.rb gemfile-verboser

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gemfile-verboser

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Estimate codebase rake stats wc -l app/models/**/*.rb | sort gem ‘rails-erd’ gem ‘railroady’

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wc -l app/models/**/*.rb wc -l app/controllers/**/*.rb

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gem ‘rails-erd’

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gem ‘railroady’

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Check out primary entities Entity-Relationship Diagrams schema.rb gem ‘annotate’

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gem ‘annotate’

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ApplicationController Callbacks Methods and helper methods Authentication

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ApplicationController

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Follow main use cases routes -> controller -> model -> view pry pry-byebug stack-trace Introspection methods ctags Integration testing gem ‘rails-footnotes’ gem ‘state_machine’ with graphs

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gem ‘rails-footnotes’

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gem ‘state_machine’ with graphs

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POROs and pattern objects lib app/services app/decorators app/facades app/helpers

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Summary UI Traversing & Domain knowledge Get the app up and running Estimate codebase Check out primary entities ApplicationController Follow main use cases POROs and pattern objects

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Feedback is welcome Nikolay Bienko, AT Consulting @bikolyarb [email protected]