chefsmart wrote:
> I have a particular scenario that I can't seem to figure out how to
> accomplish in Django.
>
> I have the following models: -
>
> class Process(models.Model):
> name = models.CharField(max_length=50)
> is_active = models.BooleanField(db_index=True)
>
> class Phase(models.Model):
> name = models.CharField(max_length=50)
> is_active = models.BooleanField(db_index=True)
>
> class ProcessPhase(models.Model):
> process = models.ForeignKey(Process)
> phase = models.ForeignKey(Phase)
> order = models.PositiveIntegerField(help_text="At what step of
> your process will this phase occur?", unique=True)
> class Meta:
> ordering = ['order']
> unique_together = (("recruitment", "phase"),)
>
> Here an instance of Process can have many instances of Phases, and
> each Phase in a Process needs to be completed in the order specified.
> Different Processes may have their phases in different order, this is
> why the order is specified as part of the ProcessPhase model instead
> of the Phase model.
>
> I am having difficulty in implementing the creation of ProcessPhase in
> the UI. Ideally the user would be able to select all the phases that
> need to be included in a given Process and specify their respective
> orders in a single "screen/page". (This is required also because in
> the ProcessPhase model, the order field has unique=True.)
>
> Right now I have a ModelMultipleChoiceField for phases so that the
> user may choose the phases that need to be included. I then use a
> second form (a formset really) to allow the user to specify the
> desired order for the selected phases. Then I tried to make it more
> intuitive for the user so that they do not have to go through two
> different forms to achieve the end result, so I explored the
> FormWizard. However, it seems the FormWizard does not support using
> formsets in its steps.
>
> So how would you implement this in Django?
> >
>
>
Sorry, but this looks pretty wrong to me.
Dunno if I get this right but if I do you should do this with M2M
relation and additional data to the M2M relation like this:
class Phase(models.Model):
name = models.CharField(max_length=50)
is_active = models.BooleanField(db_index=True)
class Process(models.Model):
name = models.CharField(max_length=50)
phases = models.ManyToManyField(Phase, through='ProcessPhase')
is_active = models.BooleanField()
class ProcessPhase(models.Model):
process = models.ForeignKey(Process)
phase = models.ForeignKey(Phase)
order = models.PositiveIntegerField()
class Meta:
ordering = ['order']
# and i think you can skip the unique together, because
# this already imply because of the M2M relation
Dunno if this is right or needs adjusted, you should read more about
this here:
http://docs.djangoproject.com/en/dev/topics/db/models/#intermediary-manytomany
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com
To unsubscribe from this group, send email to
django-users+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/django-users?hl=en
-~----------~----~----~----~------~----~------~--~---
