Stupid things I’ve done

Stupid things I’ve doneIn Ruby and Rails

Bert Goethals

Bert Goethals

We all make mistakes

That drink, that girl, the morning after

That chicken, the biting, mom laughing her ass off

But we learn

Drink less or pass out

Don’t pee on chickens

Ruby and Rails

8Mistakes for you to learn from

acts_as_inherit

Hacking rails to combine 2 models in

one model

• Modify default queries

• Provide setters / getters for “inherited” attribbutes

• Allow validation and errors on “inherited” attribbutes

• All transparent

Rails goes from 1.1 to 1.2

• Modify default queries

• Provide setters / getters for “inherited” attribbutes

• Allow validation and errors on “inherited” attribbutes

• All transparent

Don’t hack rails internals

acts_as_taggable_on_steroids

• Two extra tables

• SQL isn’t meant for search

• ActiveRecord Model overload!

Lot of overhead for a list of words

Save the list of words• No extra query for tags

• Search with Sphinx

• Generate tagclouds separately

Fighting ::NameSpaces

REST principalBut not always

attr_protectedand

attr_accessible

Controllers should control requests

Flame shield Up!

Prototype

Use jQueryor MooTools

Mephisto

Anything else!or Wordpress (PHP)

ActiveRecord

ActiveRecordFor batch processing

ActiveRecord = Lots of memoryBatch = Lots of stuff

ActiveRecord + Batch = Lots and Lots of Memory

Use DataMapperor write your own queries

alias_attribute

alias_attributeNot using it

  def name    read_attribute(:title)  end   def name=(value)    write_attribute(:title, value)  end

    alias_attribute :name, :title

R.T.F.M.

Conclusionsand questions?