mini curso

web2py@lucadavila

framework web python

# 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

/models/db.py

#database definition

db = DAL('sqlite://storage.sqlite')

#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())

#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}>

#save changes

db.commit()

#undo changes

db.rollback()

#count

db(Person.id > 0).count()

#select

persons = db(Person.id > 0).select()

person_by_id = Person(1)

#update set

db(Person.id > 0).update(name="Luke")

#update record

Person(1).update_record(name="Lucas")

#delete set

db(Person.id > 0).delete()

#delete record

Person(1).delete_record()

#truncate table (restart id sequence)

Person.truncate()

/controllers/persons.py

#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()

/views/persons/say_hello.html

#view

<h1>web2py views</h1>

<p>Controller says: {{=some_var}}</p>

#url mappinghttp://hostname /app/controller/action/arg/arg2/...?var=lucas

#dispatching

downloadweb2py.com/examples/default/download

docsweb2py.com/examples/default/documentation

web2py.com/book

Obrigado!