Daniel Roseman wrote:
> On Jan 25, 2:30 pm, andreas schmid <a.schmi...@gmail.com> wrote:
>
>> hi,
>>
>> i have to create a modificable database of parents and children (a tree
>> basically). this is easy to achieve trough a modelclass with a
>> Foreignkey to the model itself like:
>>
>> class Element(models.Model):
>> title = models.CharField(max_length=50, unique=True)
>> parent = models.ForeignKey('self', blank=True, null=True)
>>
>> my goal is a form with inlinemodels where i can choose the children
>> depending on which parent i select.
>> an example could behttp://dajaxproject.com/forms/but the level is a
>> few children deeper.
>>
>> i started doing it via ajax and json and i can get the children by
>> clicking on the parent. (still with some problems)
>> what i still cant understand if i can save this in a model?!
>>
>> i dont know if its clear what i need... i want to save it with a model
>> instance with many inlineformsets and save thit in the db.
>>
>> any hint?
>>
>> thank you
>>
>
> It's not entirely clear what you want, but for storing hierarchical
> data in Django I always recommend django-mptt.
> --
> DR.
>
>
ill try to explain it practically:
lets say i build houses and i have a db where my "servicetree" is stored
and i can add, delete or modify existing data. lets say i have a
treeroot "doors" this root has 2 children "metal door" and "wooden door"
this two again have other children and so on.
now i have a form where i can put together all the services ill perfom
for my client and start selecting the tree root "door", then it the
first children show up, i choose "wooden door" till the last child.
i would need a behaviour like an inlineformset gives where i can store
many of those service elements and store them to be able to retrieve the
given service later on if i need it. and also to make my client an offer.
i looked at mptt but i dont need to represent the tree right now and its
not the wanted result.
hopefully this explains my need a bit better.
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