On Sat, 2007-02-10 at 00:41 +0000, abe wrote:
> sorry for the previous post. accidentally pressed send too early.
>
> I can find the models which have a certain model as a ForeignKey like
> this
>
> modl=models.get_model('myapp','model1')
>
> relfieldargs = ['%s__%s' % (m.model._meta.module_name,f.name)
> for m in modl._meta.get_all_related_objects()
> for f in m.model._meta.fields ]
>
> relfieldargs
> Out[ ]:
> ['relmodl2__id',
> 'relmodl2__name',
> 'relmodl2__foo',
> ....etc.
> ]
>
> where {relmodl2__name:value} etc can be use as argument
> to modl.objects.filter(...)
>
> this works if model Relmodl2 has model2 as ForeignKey
> but not the other way round. is there an eay way to find
> those model and field names?
>
> for example relmodl2.objects.filter({'model1__nr__gt':5})
>
> where I'm looking for the other allowed strings like 'model1__nr'
>
>
> or is there an alltogether easier way to do this.
I really tried hard to understand your problem, but then my brain
started to leak out of my ears and I had to stop. :-(
Could you post an example of how all these models are related? You seem
to have Relmodl2, model2 and model1 and I'm not sure what all the
linkages are.
I think what you are asking is why does the reverse end of a ForeignKey
show up in get_all_related_objects(), but the forward direction does
not. If that is the question, the forward direction (the ForeignKey
field itself), is just an object of class ForeignKey in the _meta.fields
attribute on the model it is defined on. So you need to inspect the
class types in _meta.fields to see which are the forwards relations.
If that isn't your question, I apologise and ask only for a simple
example to illustrate the problem.
Regards,
Malcolm
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