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PODjango - for-loop with variable field name
 

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  1. PODjango - for-loop with variable field name
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    <p>Recently I started experimenting with Python and Django. I like it, learned already a lot, but still a long way to go...</p> <p>I made a model containing 5 image fields. Next to the model I also made a form to enter data and save it. So far so good. Now I want to write another form to 'edit' the uploaded images, meaning:</p> <ol> <li>upload new images</li> <li>delete the 'old' images from the database</li> </ol> <p>I wrote the code below that does the job for 1 image: </p> <pre><code>if form.is_valid(): form_image = form.cleaned_data['image_1'] try: details = Model.objects.get(pk=pk) if details.image_1 != form_image: details.image_1.delete(save=False) except: pass # when new photo then we do nothing, normal case form.save() </code></pre> <p>But I am struggling with following problems:</p> <ol> <li><p>How can this code be rewritten to update 5 image fields? Because in worst case one can edit all 5 image fields. I tried with a 'for loop' but never succeed. For example:</p> <pre><code>image_list = [image_1, image_2, image_3, image_4, image_5] if form.is_valid(): for image in image_list: form_image = form.cleaned_data[image] try: details = Model.objects.get(pk=pk) if details.image != form_image: details.image.delete(save=False) except: pass # when new photo then we do nothing, normal case form.save() </code></pre></li> <li><p>Are there more intelligent ways to write this piece of logic. A problem that I have with this code is that it checks on the name of the image. And probably this goes wrong when I have multiple images with the same name...</p></li> </ol> <p>Hopefully someone can give some feedback and point me again in the right direction.</p> <p>Many thanks!</p> <p>Kind Regards</p>
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    1. COHi again, the naming issue is solved: I can make the image name unique, using this renaming technique: [Django FileField with upload_to determined at runtime](http://stackoverflow.com/questions/1190697/django-filefield-with-upload-to-determined-at-runtime). But still the first point remains: how to loop over different images? And is this piece of code 'intelligent' meaning, is this the best way to handle the image upload? Thanks!
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