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django/tests/indexes/models.py
David Smith 097e3a70c1 Refs #33476 -- Applied Black's 2023 stable style.
Black 23.1.0 is released which, as the first release of the year,
introduces the 2023 stable style. This incorporates most of last year's
preview style.

https://github.com/psf/black/releases/tag/23.1.0
2023-02-01 11:04:38 +01:00

55 lines
1.6 KiB
Python

from django.db import models
class CurrentTranslation(models.ForeignObject):
"""
Creates virtual relation to the translation with model cache enabled.
"""
# Avoid validation
requires_unique_target = False
def __init__(self, to, on_delete, from_fields, to_fields, **kwargs):
# Disable reverse relation
kwargs["related_name"] = "+"
# Set unique to enable model cache.
kwargs["unique"] = True
super().__init__(to, on_delete, from_fields, to_fields, **kwargs)
class ArticleTranslation(models.Model):
article = models.ForeignKey("indexes.Article", models.CASCADE)
article_no_constraint = models.ForeignKey(
"indexes.Article", models.CASCADE, db_constraint=False, related_name="+"
)
language = models.CharField(max_length=10, unique=True)
content = models.TextField()
class Article(models.Model):
headline = models.CharField(max_length=100)
pub_date = models.DateTimeField()
published = models.BooleanField(default=False)
# Add virtual relation to the ArticleTranslation model.
translation = CurrentTranslation(
ArticleTranslation, models.CASCADE, ["id"], ["article"]
)
class Meta:
indexes = [models.Index(fields=["headline", "pub_date"])]
class IndexedArticle(models.Model):
headline = models.CharField(max_length=100, db_index=True)
body = models.TextField(db_index=True)
slug = models.CharField(max_length=40, unique=True)
class Meta:
required_db_features = {"supports_index_on_text_field"}
class IndexedArticle2(models.Model):
headline = models.CharField(max_length=100)
body = models.TextField()