Any organization that designs
a system will inevitably
produce a design whose
structure is a copy of the
organization's communication
structure.
Text of paper: http://bit.ly/RrHWvp
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If you have four groups
working on a compiler, you’ll
get a four-pass compiler.
class Stuff < ActiveRecord::Base
include Rails.app.url_helpers
def as_json
{url: stuff_url(id)}
end
end
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class Stuff < ActiveRecord::Base
include Rails.app.url_helpers
def as_json
{url: stuff_url(id)}
end
end
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class Stuff < ActiveRecord::Base
include Rails.app.url_helpers
def as_json
{url: stuff_url(id)}
end
end
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class Stuff < ActiveRecord::Base
end
class StuffPresenter < Presenter
def as_json
{url: stuff_url(id)}
end
end
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class Stuff < ActiveRecord::Base
include Rails.app.url_helpers
def as_json
{url: stuff_url(id)}
end
end
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class StuffController < AppContro
def show
render json:
@stuff.as_json.merge({
url: stuff_url(@stuff)
})
end
end
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Skinny controllers, fat models
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Skinny controllers, fat models
Skinny controllers, models that
only have code related to their
main purpose: persistance.
Move other stuff out to non-
ActiveRecord classes.
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Decoding Smelly Code
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Decoding Smelly Code
1. Hidden silo
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Decoding Smelly Code
1. Hidden silo
2. Developers ready for more nuance
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Decoding Smelly Code
1. Hidden silo
2. Developers ready for more nuance
2.1. Developers actually listen to me o.0
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Every piece of bad
code is trying to
tell you something.
2
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Fixing Problems
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No content
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http://www.flickr.com/photos/juniorvelo/4490511204
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Fixing Problems
• Pair programming
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Create opportunities for informal communication
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Use High-Bandwidth
Communication
http://www.flickr.com/photos/beglendc/434086133
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http://www.flickr.com/photos/malias/73169727
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Fixing Problems
• Pair programming
• Create opportunities for informal
communication
• Use high-bandwidth communication
• Teach/learn/practice
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No content
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Hack your team
3
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• Think about team
dynamics
• Use code smells to
illuminate problems
• Fix them!
http://www.flickr.com/photos/uggboy/4066337480
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• Think about team
dynamics
• Use code smells to
illuminate problems
• Fix them!
http://www.flickr.com/photos/uggboy/4066337480
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Thank you!
Sarah Mei
Pivotal Labs
@sarahmei
sarah@pivotallabs.com