| from django.db.models import Value |
| from django.db.models.functions import StrIndex |
| from django.test import TestCase |
| from django.utils import timezone |
|
|
| from ..models import Article, Author |
|
|
|
|
| class StrIndexTests(TestCase): |
| def test_annotate_charfield(self): |
| Author.objects.create(name="George. R. R. Martin") |
| Author.objects.create(name="J. R. R. Tolkien") |
| Author.objects.create(name="Terry Pratchett") |
| authors = Author.objects.annotate(fullstop=StrIndex("name", Value("R."))) |
| self.assertQuerySetEqual( |
| authors.order_by("name"), [9, 4, 0], lambda a: a.fullstop |
| ) |
|
|
| def test_annotate_textfield(self): |
| Article.objects.create( |
| title="How to Django", |
| text="This is about How to Django.", |
| written=timezone.now(), |
| ) |
| Article.objects.create( |
| title="How to Tango", |
| text="Won't find anything here.", |
| written=timezone.now(), |
| ) |
| articles = Article.objects.annotate(title_pos=StrIndex("text", "title")) |
| self.assertQuerySetEqual( |
| articles.order_by("title"), [15, 0], lambda a: a.title_pos |
| ) |
|
|
| def test_order_by(self): |
| Author.objects.create(name="Terry Pratchett") |
| Author.objects.create(name="J. R. R. Tolkien") |
| Author.objects.create(name="George. R. R. Martin") |
| self.assertQuerySetEqual( |
| Author.objects.order_by(StrIndex("name", Value("R.")).asc()), |
| [ |
| "Terry Pratchett", |
| "J. R. R. Tolkien", |
| "George. R. R. Martin", |
| ], |
| lambda a: a.name, |
| ) |
| self.assertQuerySetEqual( |
| Author.objects.order_by(StrIndex("name", Value("R.")).desc()), |
| [ |
| "George. R. R. Martin", |
| "J. R. R. Tolkien", |
| "Terry Pratchett", |
| ], |
| lambda a: a.name, |
| ) |
|
|
| def test_unicode_values(self): |
| Author.objects.create(name="ツリー") |
| Author.objects.create(name="皇帝") |
| Author.objects.create(name="皇帝 ツリー") |
| authors = Author.objects.annotate(sb=StrIndex("name", Value("リ"))) |
| self.assertQuerySetEqual(authors.order_by("name"), [2, 0, 5], lambda a: a.sb) |
|
|
| def test_filtering(self): |
| Author.objects.create(name="George. R. R. Martin") |
| Author.objects.create(name="Terry Pratchett") |
| self.assertQuerySetEqual( |
| Author.objects.annotate(middle_name=StrIndex("name", Value("R."))).filter( |
| middle_name__gt=0 |
| ), |
| ["George. R. R. Martin"], |
| lambda a: a.name, |
| ) |
|
|
