Dynamic list of ImageSpecField in a model?

[Thomas Alisi]

hey

so I would like to define a set of specs in my django settings, like

THUMBS = (640, 480, 360, 240)

then create as many ImageSpecField in my model as the number of values I define in THUMBS

I'm thinking of possible ways to implement it:

- override my model's __init__ and attach a set of ImageSpecFields (or maybe register a set of generators?)

- define a metaclass that would create the set of ImageSpecFields when __new__ is called, then extend my model with the metaclass, kind of scary to think of Django's Model class interactions...

none of these I'm really happy with, so any advise / suggestion you may have it would be greatly appreciated. trying to search on stackoverflow and here, but couldn't find anything similar

many thanks

[Thomas Alisi]

no takers? :)

[Bala Subramanyam Vemu]

Hi Thomas

The following did the trick for me

class user_specified_spec(ImageSpec):
    def __init__(self,user_source, user_processor):
        self.format = 'JPEG'
        self.source = user_source
        # like all image specs
        self.options = {'quality': settings.IMAGEQUALITY}
        # list of processors in a spec
        self.processors = user_processor
register.generator('xxx:xxxx:xxxx', user_specified_spec)

Let me know if it works for you


Thanks
Bala

[Thomas Alisi]

oh, that looks good! for the time being I've just implemented a list of fields, statically, but I'll def. give this a go, will post results here as soon as I have updates

thanks Bala!

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