mirror of
https://github.com/django/django.git
synced 2025-10-31 09:41:08 +00:00
101 lines
3.5 KiB
Python
101 lines
3.5 KiB
Python
from django.test import modify_settings
|
|
|
|
from . import PostgreSQLTestCase
|
|
from .models import CharFieldModel, TextFieldModel
|
|
|
|
try:
|
|
from django.contrib.postgres.search import (
|
|
TrigramDistance, TrigramSimilarity, TrigramWordDistance,
|
|
TrigramWordSimilarity,
|
|
)
|
|
except ImportError:
|
|
pass
|
|
|
|
|
|
@modify_settings(INSTALLED_APPS={'append': 'django.contrib.postgres'})
|
|
class TrigramTest(PostgreSQLTestCase):
|
|
Model = CharFieldModel
|
|
|
|
@classmethod
|
|
def setUpTestData(cls):
|
|
cls.Model.objects.bulk_create([
|
|
cls.Model(field='Matthew'),
|
|
cls.Model(field='Cat sat on mat.'),
|
|
cls.Model(field='Dog sat on rug.'),
|
|
])
|
|
|
|
def test_trigram_search(self):
|
|
self.assertQuerysetEqual(
|
|
self.Model.objects.filter(field__trigram_similar='Mathew'),
|
|
['Matthew'],
|
|
transform=lambda instance: instance.field,
|
|
)
|
|
|
|
def test_trigram_word_search(self):
|
|
obj = self.Model.objects.create(
|
|
field='Gumby rides on the path of Middlesbrough',
|
|
)
|
|
self.assertSequenceEqual(
|
|
self.Model.objects.filter(field__trigram_word_similar='Middlesborough'),
|
|
[obj],
|
|
)
|
|
|
|
def test_trigram_similarity(self):
|
|
search = 'Bat sat on cat.'
|
|
# Round result of similarity because PostgreSQL 12+ uses greater
|
|
# precision.
|
|
self.assertQuerysetEqual(
|
|
self.Model.objects.filter(
|
|
field__trigram_similar=search,
|
|
).annotate(similarity=TrigramSimilarity('field', search)).order_by('-similarity'),
|
|
[('Cat sat on mat.', 0.625), ('Dog sat on rug.', 0.333333)],
|
|
transform=lambda instance: (instance.field, round(instance.similarity, 6)),
|
|
ordered=True,
|
|
)
|
|
|
|
def test_trigram_word_similarity(self):
|
|
search = 'mat'
|
|
self.assertSequenceEqual(
|
|
self.Model.objects.filter(
|
|
field__trigram_word_similar=search,
|
|
).annotate(
|
|
word_similarity=TrigramWordSimilarity(search, 'field'),
|
|
).values('field', 'word_similarity').order_by('-word_similarity'),
|
|
[
|
|
{'field': 'Cat sat on mat.', 'word_similarity': 1.0},
|
|
{'field': 'Matthew', 'word_similarity': 0.75},
|
|
],
|
|
)
|
|
|
|
def test_trigram_similarity_alternate(self):
|
|
# Round result of distance because PostgreSQL 12+ uses greater
|
|
# precision.
|
|
self.assertQuerysetEqual(
|
|
self.Model.objects.annotate(
|
|
distance=TrigramDistance('field', 'Bat sat on cat.'),
|
|
).filter(distance__lte=0.7).order_by('distance'),
|
|
[('Cat sat on mat.', 0.375), ('Dog sat on rug.', 0.666667)],
|
|
transform=lambda instance: (instance.field, round(instance.distance, 6)),
|
|
ordered=True,
|
|
)
|
|
|
|
def test_trigram_word_similarity_alternate(self):
|
|
self.assertSequenceEqual(
|
|
self.Model.objects.annotate(
|
|
word_distance=TrigramWordDistance('mat', 'field'),
|
|
).filter(
|
|
word_distance__lte=0.7,
|
|
).values('field', 'word_distance').order_by('word_distance'),
|
|
[
|
|
{'field': 'Cat sat on mat.', 'word_distance': 0},
|
|
{'field': 'Matthew', 'word_distance': 0.25},
|
|
],
|
|
)
|
|
|
|
|
|
class TrigramTextFieldTest(TrigramTest):
|
|
"""
|
|
TextField has the same behavior as CharField regarding trigram lookups.
|
|
"""
|
|
Model = TextFieldModel
|