class TrigramSimilarity(expression, string, **extra) [source]
New in Django 1.10.
Accepts a field name or expression, and a string or expression. Returns the trigram similarity between the two arguments.
Usage example:
>>> from django.contrib.postgres.search import TrigramSimilarity
>>> Author.objects.create(name='Katy Stevens')
>>> Author.objects.create(name='Stephen Keats')
>>> test = 'Katie Stephens'
>>> Author.objects.annotate(
... similarity=TrigramSimilarity('name', test),
... ).filter(similarity__gt=0.3).order_by('-similarity')
[<Author: Katy Stevens>, <Author: Stephen Keats>]
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