gistfile1.py

from django.db import models

from django.db import models

import xworkflows
from django_xworkflows import models as dxmodels

class TransitionLog(dxmodels.BaseTransitionLog):

    # This is where we'll store the modified object
    my = models.ForeignKey('My')

    # Extra data to keep about transitions
    ip = models.CharField(max_length=24, blank=True)
    source = models.CharField(max_length=24, blank=True)

    # Set the name of the field where the modified object goes
    MODIFIED_OBJECT_FIELD = 'my'

    # Define extra logging attributes
    EXTRA_LOG_ATTRIBUTES = (
        ('ip', 'ip', ''),  # Transitions are called with 'ip' kwarg
        ('source', 'source', ''),  # Transitions are called with 'ip' kwarg
    )

class MyWorkflowImplWrapper(xworkflows.base.ImplementationWrapper):
    def _post_transition(self, result, *args, **kwargs):
	super(MyWorkflowImplWrapper, self)._post_transition(self, result, *args, **kwargs)
	#print self, result, args, kwargs
	#print type(self.instance), self.instance.id, self.field_name, self.transition.name, self.workflow
	print self.instance.__module__, self.instance.__class__.__name__, 'entered state', self.transition.name
	
class MyWorkflow(dxmodels.Workflow):
    log_model_class = TransitionLog

    states = (
        ('foo', u"Foo"),
        ('bar', u"Bar"),
        ('baz', u"Baz"),
    )
    transitions = (
        ('foobar', 'foo', 'bar'),
        ('gobaz', ('foo', 'bar'), 'baz'),
        ('bazbar', 'baz', 'bar'),
    )
    
    initial_state = 'foo'

    implementation_class = MyWorkflowImplWrapper

class My(dxmodels.WorkflowEnabled, models.Model):
    state = dxmodels.StateField(MyWorkflow)
    other = models.CharField(max_length=4)

from order.models import My
m = My()
m.save()
m.foobar()
order.models.My with id 20 entered state bar via foobar
m.state.workflow.transitions
TransitionList([Transition('gobaz', [<State: 'foo'>, <State: 'bar'>], <State: 'baz'>), Transition('foobar', [<State: 'foo'>], <State: 'bar'>), Transition('bazbar', [<State: 'baz'>], <State: 'bar'>)])
m.bazbar()
Traceback (most recent call last):
File "", line 1, in
File "/home/frutik/virtualenv/xworkflows/local/lib/python2.7/site-packages/xworkflows/base.py", line 380, in call
self._pre_transition_checks()
File "/home/frutik/virtualenv/xworkflows/local/lib/python2.7/site-packages/xworkflows/base.py", line 347, in _pre_transition_checks
(self.transition.name, current_state.name))
InvalidTransitionError: Transition 'bazbar' isn't available from state 'bar'.
m.gobaz()
order.models.My with id 20 entered state baz via gobaz
m.bazbar()
order.models.My with id 20 entered state bar via bazbar