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Fixed #33788 -- Added TrigramStrictWordSimilarity() and TrigramStrictWordDistance() on PostgreSQL.

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Matt Brewer 2022-06-17 08:44:03 +01:00 • committed by Mariusz Felisiak
parent 3ef37a5245
commit 8d160f154f
8 changed files with 130 additions and 5 deletions
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48
tests/postgres_tests/test_trigram.py
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@ -7,6 +7,8 @@ try:
from django.contrib.postgres.search import (
TrigramDistance,
TrigramSimilarity,
TrigramStrictWordDistance,
TrigramStrictWordSimilarity,
TrigramWordDistance,
TrigramWordSimilarity,
)
@ -43,6 +45,25 @@ class TrigramTest(PostgreSQLTestCase):
self.Model.objects.filter(field__trigram_word_similar="Middlesborough"),
[obj],
)
self.assertSequenceEqual(
self.Model.objects.filter(field__trigram_word_similar="Middle"),
[obj],
)
def test_trigram_strict_word_search_matched(self):
obj = self.Model.objects.create(
field="Gumby rides on the path of Middlesbrough",
)
self.assertSequenceEqual(
self.Model.objects.filter(
field__trigram_strict_word_similar="Middlesborough"
),
[obj],
)
self.assertSequenceEqual(
self.Model.objects.filter(field__trigram_strict_word_similar="Middle"),
[],
)
def test_trigram_similarity(self):
search = "Bat sat on cat."
@ -75,6 +96,19 @@ class TrigramTest(PostgreSQLTestCase):
],
)
def test_trigram_strict_word_similarity(self):
search = "matt"
self.assertSequenceEqual(
self.Model.objects.filter(field__trigram_word_similar=search)
.annotate(word_similarity=TrigramStrictWordSimilarity(search, "field"))
.values("field", "word_similarity")
.order_by("-word_similarity"),
[
{"field": "Cat sat on mat.", "word_similarity": 0.5},
{"field": "Matthew", "word_similarity": 0.44444445},
],
)
def test_trigram_similarity_alternate(self):
# Round result of distance because PostgreSQL uses greater precision.
self.assertQuerysetEqual(
@ -104,6 +138,20 @@ class TrigramTest(PostgreSQLTestCase):
],
)
def test_trigram_strict_word_distance(self):
self.assertSequenceEqual(
self.Model.objects.annotate(
word_distance=TrigramStrictWordDistance("matt", "field"),
)
.filter(word_distance__lte=0.7)
.values("field", "word_distance")
.order_by("word_distance"),
[
{"field": "Cat sat on mat.", "word_distance": 0.5},
{"field": "Matthew", "word_distance": 0.5555556},
],
)
class TrigramTextFieldTest(TrigramTest):
"""