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from django.forms import ImageField
from ..specs import SpecHost
from ..utils import generate
class ProcessedImageField(ImageField, SpecHost):
def __init__(self, processors=None, format=None, options=None,
autoconvert=True, spec_id=None, spec=None, *args, **kwargs):
if spec_id is None:
# Unlike model fields, form fields are never told their field name.
# (Model fields are done so via `contribute_to_class()`.) Therefore
# we can't really generate a good spec id automatically.
raise TypeError('You must provide a spec_id')
SpecHost.__init__(self, processors=processors, format=format,
options=options, autoconvert=autoconvert, spec=spec,
spec_id=spec_id)
super().__init__(*args, **kwargs)
def clean(self, data, initial=None):
data = super().clean(data, initial)
if data and data != initial:
spec = self.get_spec(source=data)
f = generate(spec)
# Name is required in Django 1.4. When we drop support for it
# then we can directly return the result from `generate(spec)`
f.name = data.name
return f
return data
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