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POPopulating Models from other Models in Django?
 

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    <p>This is somewhat related to the question posed in <a href="https://stackoverflow.com/questions/1398857/django-model-inheritance-can-i-change-model-type">this question</a> but I'm trying to do this with an abstract base class.</p> <p>For the purposes of this example lets use these models:</p> <pre><code>class Comic(models.Model): name = models.CharField(max_length=20) desc = models.CharField(max_length=100) volume = models.IntegerField() ... &lt;50 other things that make up a Comic&gt; class Meta: abstract = True class InkedComic(Comic): lines = models.IntegerField() class ColoredComic(Comic): colored = models.BooleanField(default=False) </code></pre> <p>In the view lets say we get a reference to an <code>InkedComic id</code> since the tracer, err I mean, inker is done drawing the lines and it's time to add color. Once the view has added all the color we want to save a <code>ColoredComic</code> to the db.</p> <p>Obviously we could do</p> <pre><code>inked = InkedComic.object.get(pk=ink_id) colored = ColoredComic() colored.name = inked.name etc, etc. </code></pre> <p>But really it'd be nice to do:</p> <pre><code>colored = ColoredComic(inked_comic=inked) colored.colored = True colored.save() </code></pre> <p>I tried to do</p> <pre><code>class ColoredComic(Comic): colored = models.BooleanField(default=False) def __init__(self, inked_comic = False, *args, **kwargs): super(ColoredComic, self).__init__(*args, **kwargs) if inked_comic: self.__dict__.update(inked_comic.__dict__) self.__dict__.update({'id': None}) # Remove pk field value </code></pre> <p>but it turns out the <code>ColoredComic.objects.get(pk=1)</code> call sticks the <code>pk</code> into the <code>inked_comic</code> keyword, which is obviously not intended. (and actually results in a <code>int</code> does not have a <code><strong>dict</strong></code> exception)</p> <p>My brain is fried at this point, am I missing something obvious, or is there a better way to do this?</p>
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