1
0
mirror of https://github.com/django/django.git synced 2024-12-23 09:36:06 +00:00
django/tests/backends/postgresql/test_operations.py

81 lines
2.8 KiB
Python

import unittest
from django.core.management.color import no_style
from django.db import connection
from django.db.models.expressions import Col
from django.db.models.functions import Cast
from django.test import SimpleTestCase
from ..models import Author, Book, Person, Tag
@unittest.skipUnless(connection.vendor == "postgresql", "PostgreSQL tests.")
class PostgreSQLOperationsTests(SimpleTestCase):
def test_sql_flush(self):
self.assertEqual(
connection.ops.sql_flush(
no_style(),
[Person._meta.db_table, Tag._meta.db_table],
),
['TRUNCATE "backends_person", "backends_tag";'],
)
def test_sql_flush_allow_cascade(self):
self.assertEqual(
connection.ops.sql_flush(
no_style(),
[Person._meta.db_table, Tag._meta.db_table],
allow_cascade=True,
),
['TRUNCATE "backends_person", "backends_tag" CASCADE;'],
)
def test_sql_flush_sequences(self):
self.assertEqual(
connection.ops.sql_flush(
no_style(),
[Person._meta.db_table, Tag._meta.db_table],
reset_sequences=True,
),
['TRUNCATE "backends_person", "backends_tag" RESTART IDENTITY;'],
)
def test_sql_flush_sequences_allow_cascade(self):
self.assertEqual(
connection.ops.sql_flush(
no_style(),
[Person._meta.db_table, Tag._meta.db_table],
reset_sequences=True,
allow_cascade=True,
),
['TRUNCATE "backends_person", "backends_tag" RESTART IDENTITY CASCADE;'],
)
def test_prepare_join_on_clause_same_type(self):
author_table = Author._meta.db_table
author_id_field = Author._meta.get_field("id")
lhs_expr, rhs_expr = connection.ops.prepare_join_on_clause(
author_table,
author_id_field,
author_table,
author_id_field,
)
self.assertEqual(lhs_expr, Col(author_table, author_id_field))
self.assertEqual(rhs_expr, Col(author_table, author_id_field))
def test_prepare_join_on_clause_different_types(self):
author_table = Author._meta.db_table
author_id_field = Author._meta.get_field("id")
book_table = Book._meta.db_table
book_fk_field = Book._meta.get_field("author")
lhs_expr, rhs_expr = connection.ops.prepare_join_on_clause(
author_table,
author_id_field,
book_table,
book_fk_field,
)
self.assertEqual(lhs_expr, Col(author_table, author_id_field))
self.assertEqual(
rhs_expr, Cast(Col(book_table, book_fk_field), author_id_field)
)