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wlimages/forms.py

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from django import forms

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from models import Image

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import os

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class UploadImageForm(forms.Form):

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    imagename = forms.ImageField()

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    def clean_imagename( self ):

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        name = self.cleaned_data["imagename"]

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        if Image.objects.has_image(name.name.lower()):

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            raise forms.ValidationError, "An Image with this name already exists. Please rename and upload again."

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