This document provides an overview of the web2py framework in 3 paragraphs or less. It discusses key features like being open source, MVC architecture, database support including SQLite and MySQL, and having a small learning curve. It then demonstrates basic model, controller, and view functionality through code examples like defining a database table, inserting and querying records, and linking views to controller actions.

1. mini curso
web2py
@lucadavila

2. framework web python

3. # opensource
# seguro
# model view controller
# windows, mac, unix/linux, GAE
# SQLite, PostgreSQL, MySQL, Oracle, GAE...
# apache, lighttpd, cherokee, *mod_python ...
# compatibilidade reversa
# curva aprendizado pequena
# interface administrativa web

4. /models/db.py

5. #database definition
db = DAL('sqlite://storage.sqlite')

6. #model definition
Person = db.define_table('persons',
Field('name', label='Your name'),
Field('email'),
)
#validators
Person.name.requires = IS_NOT_EMPTY()
Person.email.requires = IS_EMPTY_OR(IS_EMAIL())

7. #insert (without validating)
Person.insert(name="Lucas D'Avila", email="lucassdvl@gmail.com")
Person.insert(name="", email="foo")
#validate and insert
Person.validate_and_insert(name="", email="foo")
<Row {'errors': <Row {'name': <lazyT 'enter a value'>,
'email': <lazyT 'enter a valid email address'>}>, 'id': None}>

8. #save changes
db.commit()
#undo changes
db.rollback()

9. #count
db(Person.id > 0).count()
#select
persons = db(Person.id > 0).select()
person_by_id = Person(1)

10. #update set
db(Person.id > 0).update(name="Luke")
#update record
Person(1).update_record(name="Lucas")

11. #delete set
db(Person.id > 0).delete()
#delete record
Person(1).delete_record()
#truncate table (restart id sequence)
Person.truncate()

12. /controllers/persons.py

13. #action returning a string
def say_hello():
return dict(some_var = "Hello world!")
#action returning a set of database records
def persons() :
persons = db(Person.id > 0).select()
return locals()

14. /views/persons/say_hello.html

15. #view
<h1>web2py views</h1>
<p>Controller says: {{=some_var}}</p>

16. #url mapping
http://hostname /app/controller/action/arg/arg2/...?var=lucas

17. #dispatching

18. download
web2py.com/examples/default/download

19. docs
web2py.com/examples/default/documentation
web2py.com/book

20. Obrigado!