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copied!<p>You could also create a custom model field type - see <a href="http://docs.djangoproject.com/en/dev/howto/custom-model-fields/#howto-custom-model-fields" rel="noreferrer">http://docs.djangoproject.com/en/dev/howto/custom-model-fields/#howto-custom-model-fields</a></p> <p>In this case, you could 'inherit' from the built-in IntegerField and override its validation logic.</p> <p>The more I think about this, I realize how useful this would be for many Django apps. Perhaps a IntegerRangeField type could be submitted as a patch for the Django devs to consider adding to trunk.</p> <p>This is working for me:</p> <pre><code>from django.db import models class IntegerRangeField(models.IntegerField): def __init__(self, verbose_name=None, name=None, min_value=None, max_value=None, **kwargs): self.min_value, self.max_value = min_value, max_value models.IntegerField.__init__(self, verbose_name, name, **kwargs) def formfield(self, **kwargs): defaults = {'min_value': self.min_value, 'max_value':self.max_value} defaults.update(kwargs) return super(IntegerRangeField, self).formfield(**defaults) </code></pre> <p>Then in your model class, you would use it like this (field being the module where you put the above code):</p> <pre><code>size = fields.IntegerRangeField(min_value=1, max_value=50) </code></pre> <p>OR for a range of negative and positive (like an oscillator range):</p> <pre><code>size = fields.IntegerRangeField(min_value=-100, max_value=100) </code></pre> <p>What would be really cool is if it could be called with the range operator like this:</p> <pre><code>size = fields.IntegerRangeField(range(1, 50)) </code></pre> <p>But, that would require a lot more code since since you can specify a 'skip' parameter - range(1, 50, 2) - Interesting idea though...</p>

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