Re: get_FOO_display() for generic/variable choice fields

Maybe try:

val = getattr(obj, 'get_%s_display' % field.name)()

On 1/24/12, katstevens <kat.stevens@gmail.com> wrote:
> I have a model ContactDetail with two choice fields,
> ContactDetail.dialing_code and ContactDetail.country. These use the
> standard tuples ('AU', 'Australia') and so on.
>
> I know I can use get_country_display() and get_dialing_code_display()
> to show the longer values, but is there a more generic version where
> the field name is replaced with a variable?
>
> For example, I want to create a customised .csv file from the model
> data. I can loop through the fields from my model and get the shorter
> attribute values without any problems. However I'd like to do
> something like this:
>
> obj = queryset[my_item] # an instance of ContactDetail()
> model = queryset.model # ContactDetail() itself
>
> for field in model._meta.fields:
> val = getattr(obj, field.name) # gets the shorter version
> if field.choices: # if field is ChoiceField, convert data
> to display mode
> val = obj.get_field_display()
> row.append(val)
>
> Obviously the 'val = obj.get_field_display()' line doesn't work!
>
> Is there a generic way of doing this (something like
> obj.get_display(fieldname) ?) or am I going to have to hard code
> separate checks for get_country_display() and
> get_dialing_code_display()?
>
> Ideally I would like to use this particular function for other models
> and keep the fields as generic as possible.
>
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