Can You Filter Django Querysets Based on Model Properties?

Filtering by Django Model Properties

Can you filter a Django queryset based on a model property? Imagine you have a model property defined as follows:

<code class="python">@property
def myproperty(self):
    # ...</code>

You want to filter the queryset using this property, something like:

<code class="python">MyModel.objects.filter(myproperty=[...])</code>

Is this achievable?

Answer

Unfortunately, it's not possible to filter directly on model properties in Django. Django filters operate at the database level, generating SQL. To evaluate Python properties, you must bring the object into Python first. However, this approach defeats the purpose of database filtering.

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