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db.models.Avg

class Avg(expression, output_field=FloatField(), **extra) [source]

Returns the mean value of the given expression, which must be numeric unless you specify a different output_field.

Default alias: <field>__avg
Return type: float (or the type of whatever output_field is specified)

Changed in Django 1.9:

The output_field parameter was added to allow aggregating over non-numeric columns, such as DurationField.

Links:

https://docs.djangoproject.com/en/1.10/ref/models/querysets/#django.db.models.Avg

doc_Django

2016-10-09 18:35:12

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