#django

solved my problem...

no idea what it was but a good reset seems to have fixed it

i must have been looking at the wrong files...

next question, django related!

is it possible to get the pk of a model instance before you call .save() on it

if you've just constructed the model in memory it can't have a pk value [unless you assigned one... almost never a good move]

limbera: I don't think that's even possible.

hmm

i've tried to use save(commit=False)

which i thought might do it, but regardless i am getting an error about using that

is that syntax not correct?

save() got an unexpected keyword argument 'commit'

that's the view code in question

limbera: You don't even the commit=False there.

commit=False explcitly does NOT touch the DB

*need

gotcha

see, once again... explain what you're trying to do up front

sure

"I want to generate an order number based on the PK assigned to my instance"...

i suppose i could just make order_number default to ""

yeah i get cha

instead of asking what i think i am asking :P

i'm usually better i promise

(at asking!)

I'd recommend you use a post-save signal to check (a) if it's created, and (b) if it has no order_no...

if so, update it and generate

and save

by having those tests in place you avoid infinite loop

sure i'll look into that

I hate signals!

why would (b) ever be the case?

hmmm so i have just tried to simply add the field to the model instance

line 14 prints the order number to console as expected

but when i inspect in the admin it isn't present

this is the model

can you use prefetch_related with a .filter?

limbera: when you instantiate your model, can't you just put order_no there?

zkanda: the order_no is based on the model pk

so i don't think so (that was my original problem)

I have myModel.objects.filter(...) and I'd also like to have one field from a model that this model foreign keys to

Hello folks

Oh got it. Wait a min.

order_no defaults to "" on the original save/instantiation

and then i try override it with the new one (generated based on the pk)

I am trying to use django_ajax_select in a web app but i get an error

It complains of ImproperlyConfigured: settings.AJAX_LOOKUP_CHANNELS not configured correctly for 'TableItemLookUp'

But I have configured as per the document. Could someone please help ?

does anyone have any suggestions on preferable python highlighters for sublime text 2 ?

nvm. seems it has one built in thats decent.

When using django_ajax_select I am getting an error as below

The error is __init__() got an unexpected keyword argument 'mimetype'

Does it has something to do with Django version 1.7.4 that i am using?

I posted the complete question here. Appreciate if someone could help.