[Django]-Uploading Wagtail images from outside of wagtail

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The problem here is that the avatar ForeignKey field on your model is expecting to receive an instance of the wagtailimages.Image model. The ImageField on the form isn’t capable of providing this – it only provides a file object. To make this work, you’ll need to set up your form (which I’m assuming is a ModelForm) to create the wagtailimages.Image object at the same time as your own model. It should be possible to do this with a custom save method as follows:

  • Rename avatar = forms.ImageField to something that doesn’t clash with the avatar model field, such as avatar_image
  • Ensure that avatar_image is included in your ModelForm’s fields definition, but avatar isn’t. At this point, avatar_image is just an extra field on the form, with no connection to the model.

  • Define the following save method on the ModelForm:

    from wagtail.images.models import Image

def save(self, commit=False):
    if not commit:
        raise Exception("This form doesn't support save(commit=False)")

    # build the instance for this form, but don't save it to the db yet
    instance = super(MyForm, self).save(commit=False)

    # create the Image object
    avatar = Image.objects.create(
        file=self.cleaned_data['avatar_image'],
        title="Image title"
        # you may need to add more fields such as collection to make it a valid image...
    )

    # attach the image to your final model, and save
    instance.avatar = avatar
    instance.save()
    return instance
👤gasman

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