Question

I’d like to save thumbnails on request for some fields in one model-class. The pain for me is, how do I manage to keep the thumbnail-class as simple as possible?

Let’s say I’ve got this main-class

class Staff(models.Model):
    name = models.CharField(max_length=100)
    img1 = models.ImageField(upload_to=upload_path)
    img2 = models.ImageField(upload_to=upload_path)
    img3 = models.ImageField(upload_to=upload_path)
    ...

Now I’d like to save a thumbnail for each img-field in another model-class. So I’m able to query against Thumbnail if there is a thumb for e.g. img1…something like this (not working code)

class Thumbnail(models.Model):
    staff = models.ForeignKey(Staff)
    field = models.FooBar('Staff._meta.fields...')
    thumb = models.ImageField(upload_to=upload_path2)

Any suggestions or ideas of how this Thumbnail-class could look like?

Answer 1

I would suggest little more change to the models for better storing image and thumbnail.
You can create ImageInfo model that holds original image, thumbnail and any other attributes. It will have foriegnkey with Staff so that you can have multiple images for a Staff

class Staff(models.Model):
    name = models.CharField(max_length=100)


class ImageInfo(models.Model):
    staff = models.ForeignKey(Staff)
    img = models.ImageField(upload_to=upload_path)
    thumb = models.ImageField(upload_to=upload_path2)

Now you can find images which have thumbnail set are

staff_obj.imageinfo_set.filter(thumb__isnull=False)