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