@@ -2,7 +2,7 @@ Morph allows you to emerge class definitions via calling assignment methods; mix -== Morph example with Hpricot +== Morph playing with +Hpricot+ Here's example code showing Morph playing with Hpricot: @@ -36,16 +36,18 @@ What new methods do we have? Ah-ha, so we have a name attribute now: - why.name #=> "why the lucky stiff" + 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] + 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="] + Hubbit.morph_methods + # => ["email", "email=", "name", "name=", "projects", "projects="] Let's do some more morphing: @@ -54,66 +56,71 @@ Let's do some more morphing: Do we have more methods now? - Hubbit.morph_methods # => ["blog", "blog=", "company", "company=", "email", "email=", "location", "location=" "name", "name=", "projects", "projects="] + 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+ -== Morph example from Hash +Time to generate an Active Record model? Get a sample script line like this: -How about adding a hash of attribute values? + 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+ -== Morph example hijacking method creation - -class VegieFoxes - include Morph +Create an item: - def method_missing symbol, *args - if (is_writer = symbol.to_s =~ /=$/) - morph_method_missing(symbol, *args) do |base, attribute| - create_accessors base, attribute - end - send(symbol, *args) - else - super - end - end + class Item; include Morph; end + item = Item.new + item.morph :name => 'spinach', :cost => 0.50 - private - def create_accessors base, attribute - base.class_eval "attr_reader :#{attribute}" +Now an order: - base.class_def("#{attribute}=") do |value| - is_meat = %w[bacon ham].include? value - value = is_meat ? 'spinach' : value - instance_variable_set "@#{attribute}".to_sym, value - end - end -end - -foxes = VegieFoxes.new + class Order; include Morph; end + order = Order.new + order.no = 123 + order.items = [item] -foxes.chunky = 'bacon' -foxes.inspect # => #<VegieFoxes @chunky="spinach"> +Want to retrieve all that as a nested hash of values? No problem: -foxes.chunky = 'cheese' -puts foxes.inspect # => #<VegieFoxes @chunky="cheese"> + order.morph_attributes + # => {:items=>[{:name=>"spinach", :cost=>0.5}], :no=>123} -foxes.pet = 'ham' -foxes.inspect # => #<VegieFoxes @pet="spinach", @chunky="cheese"> == Last bits README bb29d423fb0abbcb7383eb30fc6a1ad226a20cdf robmckinnon rob@theyworkforyou.co.nz http://github.com/robmckinnon/morph/commit/7ca699ba35a0566d2fba5df3c7413076918ba8c3 7ca699ba35a0566d2fba5df3c7413076918ba8c3 2008-05-01T10:18:25-07:00 2008-05-01T10:18:25-07:00 updated for 0.2.0 release 97095e416ebd9820b0c4b2f26642a96b7dcdb062 robmckinnon rob@theyworkforyou.co.nz