My talk at the GuruSC (Santa Catarina's ruby user group) 2012

1. Construíndo APIs
usando Rails
Rafael Felix

2. Rafael quem?

3. Rafael quem?
Rafael Felix
Software Developer

4. Aplicação Servidor Externo

5. XML
Aplicação Servidor Externo
WS - SOAP

6. Aplicação Servidor Externo

7. Aplicação Servidor Externo
app-servidor

8. Aplicação Servidor Externo
JSON XML
RESTfull WS - SOAP
app-servidor

9. Cliente
Aplicação Servidor Externo
JSON XML
RESTfull WS - SOAP
app-servidor

10. HTTP Cliente
HTML
API - JSON
RESTfull
Aplicação Servidor Externo
JSON XML
RESTfull WS - SOAP
app-servidor

12. class XptoController < ApplicationController
def show
@xpto = Xpto.find params[:id]
end
end
resource :xpto, :only => [:show]

13. class XptoController < ApplicationController
def show
@xpto = Xpto.find params[:id]
respond_to do |format|
format.html
format.json{ render :json => @xpto }
end
end
end

14. @xpto.to_json
{
"id": 1,
"text": "Foo Bar",
"created_at": "2012-04-12T01:37:27Z",
class XptoController < ApplicationController
def show"updated_at": "2012-04-12T01:37:27Z"
}
@xpto = Xpto.find params[:id]
respond_to do |format|
format.html
format.json{ render :json => @xpto }
end
end
end

15. class XptoController < ApplicationController
def show
@xpto = Xpto.find params[:id]
respond_to do |format|
format.html
format.json{
render :json => @xpto.to_json(:include =>
[:children])
}
end
end
end

16. class XptoController < ApplicationController
def show
@xpto.to_json
@xpto = Xpto.find params[:id]
JSON::ParserError: 756: unexpected token at
respond_to do |format|
format.html
format.json{
render :json => @xpto.to_json(:include =>
[:children])
}
end
end
end

17. E agora quem
poderá nos
defender?

18. class XptoController < ApplicationController
def show
@xpto = Xpto.find params[:id]
respond_to do |format|
format.html
format.json{
render :json => @xpto.to_json(:include =>
[:children])
}
end
end
end

19. class XptoController < ApplicationController
def show
@xpto = Xpto.find params[:id]
respond_to do |format|
format.html
format.json{
render :json => @xpto.as_json(:include =>
[:children])
}
end
end
end

20. class XptoController < ApplicationController
def show
@xpto = Xpto.find params[:id]
respond_to do |format|
format.html
format.json{
render :json => @xpto
}
end
end
end

21. class Xpto
def as_json(options={})
super(options.merge(:include => [:children]))
end
end

22. class YptoController < ApplicationController
respond_to :html, :json
def show
@xpto = Xpto.find params[:id]
respond_with @xpto
end
end

24. https://github.com/nesquena/rabl

25. app/views/xpto/show.json.rabl
object @xpto
child :children do
attributes :id, :name, :description
end

26. app/views/ypto/show.json.rabl
object @xpto
child :owner do
attributes :id, :name
end

27. https://github.com/rails/jbuilder

28. app/views/xpto/show.json.jbuilder
json.(@xpto, :id, :text, :created_at, :updated_at)
json.children @xpto.children, :id, :name, :description

29. app/views/ypto/show.json.jbuilder
json.(@xpto, :id, :text, :created_at, :updated_at)
json.owner do |json|
json.id @xpto.owner.id
json.name @xpto.owner.name
json.description @xpto.owner.description
end

30. class XptoController < ApplicationController
respond_to :html, :json
def show
@xpto = Xpto.find params[:id]
respond_with @xpto
end
end

31. Obrigado!
@rs_felix
felix.rafael@gmail.com