Morph allows you to emerge class definitions via calling assignment methods; mix with Hpricot for screen scrapping fun.
== Morph playing with +Hpricot+
Here's example code showing Morph playing with Hpricot:
require 'hpricot'; require 'open-uri'; require 'morph'
class Hubbit
include Morph # allows class to morph
def initialize name
doc = Hpricot open("http://github.com/#{name}")
(doc/'label').collect do |node|
label = node.inner_text
value = node.next_sibling.inner_text.strip
morph(label, value) # morph magic happening here!
end
end
end
def Hubbit name; Hubbit.new name; end
The model emerges from the data. Let's start by looking up 'why':
why = Hubbit 'why'
What new methods do we have?
Hubbit.morph_methods # => ["email", "email=", "name", "name="]
Ah-ha, so we have a name attribute now:
why.name # => "why the lucky stiff"
Let's add some of why's projects:
why.projects = %w[shoes hacketyhack camping hoodwinkd hpricot
markaby mousehole parkplace poignant sandbox]
That why's a productive fellow! Note new accessor methods have been added:
Hubbit.morph_methods
# => ["email", "email=", "name", "name=", "projects", "projects="]
Let's do some more morphing:
dhh = Hubbit 'dhh'
Do we have more methods now?
Hubbit.morph_methods
# => ["blog", "blog=", "company", "company=", "email", "email=",
# "location", "location=" "name", "name=", "projects", "projects="]
So, a new company method has appeared:
dhh.company #=> "37signals"
== Morph making sample Active Record line via +script_generate+
Time to generate an Active Record model? Get a sample script line like this:
Hubbit.script_generate
# => "ruby script/destroy rspec_model Hubbit;
# ruby script/generate rspec_model Hubbit blog:string company:string
# email:string location:string name:string projects:string"
or specify the generator:
Hubbit.script_generate :generator => 'model'
# => "ruby script/destroy model Hubbit;
# ruby script/generate model Hubbit blog:string company:string
# email:string location:string name:string projects:string"
You'll have to edit this as it currently sets all data types to be string, and
doesn't understand associations.
== Morph setting hash of attributes via +morph+
class Order; include Morph; end
order = Order.new
How about adding a hash of attribute values?
order.morph :drink => 'tea', :spoons_of_sugar => 2, :milk => 'prefer soya thanks'
Looks like we got 'em:
order.drink # => "tea"
order.spoons_of_sugar # => 2
order.milk # => "prefer soya thanks"
== Morph obtaining hash of attributes via +morph_attributes+
Create an item:
class Item; include Morph; end
item = Item.new
item.morph :name => 'spinach', :cost => 0.50
Now an order:
class Order; include Morph; end
order = Order.new
order.no = 123
order.items = [item]
Want to retrieve all that as a nested hash of values? No problem:
order.morph_attributes
# => {:items=>[{:name=>"spinach", :cost=>0.5}], :no=>123}
== Last bits
See examples/ directory for some example code.
See LICENSE for the terms of this software.
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