275 lines
12 KiB
Python
275 lines
12 KiB
Python
from django.db import connection
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from django.db.backends.ddl_references import (
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Columns, Expressions, ForeignKeyName, IndexName, Statement, Table,
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)
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from django.db.models import ExpressionList, F
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from django.db.models.functions import Upper
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from django.db.models.indexes import IndexExpression
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from django.db.models.sql import Query
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from django.test import SimpleTestCase, TransactionTestCase
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from .models import Person
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class TableTests(SimpleTestCase):
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def setUp(self):
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self.reference = Table('table', lambda table: table.upper())
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def test_references_table(self):
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self.assertIs(self.reference.references_table('table'), True)
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self.assertIs(self.reference.references_table('other'), False)
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def test_rename_table_references(self):
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self.reference.rename_table_references('other', 'table')
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self.assertIs(self.reference.references_table('table'), True)
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self.assertIs(self.reference.references_table('other'), False)
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self.reference.rename_table_references('table', 'other')
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self.assertIs(self.reference.references_table('table'), False)
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self.assertIs(self.reference.references_table('other'), True)
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def test_repr(self):
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self.assertEqual(repr(self.reference), "<Table 'TABLE'>")
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def test_str(self):
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self.assertEqual(str(self.reference), 'TABLE')
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class ColumnsTests(TableTests):
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def setUp(self):
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self.reference = Columns(
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'table', ['first_column', 'second_column'], lambda column: column.upper()
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)
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def test_references_column(self):
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self.assertIs(self.reference.references_column('other', 'first_column'), False)
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self.assertIs(self.reference.references_column('table', 'third_column'), False)
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self.assertIs(self.reference.references_column('table', 'first_column'), True)
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def test_rename_column_references(self):
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self.reference.rename_column_references('other', 'first_column', 'third_column')
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self.assertIs(self.reference.references_column('table', 'first_column'), True)
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self.assertIs(self.reference.references_column('table', 'third_column'), False)
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self.assertIs(self.reference.references_column('other', 'third_column'), False)
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self.reference.rename_column_references('table', 'third_column', 'first_column')
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self.assertIs(self.reference.references_column('table', 'first_column'), True)
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self.assertIs(self.reference.references_column('table', 'third_column'), False)
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self.reference.rename_column_references('table', 'first_column', 'third_column')
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self.assertIs(self.reference.references_column('table', 'first_column'), False)
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self.assertIs(self.reference.references_column('table', 'third_column'), True)
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def test_repr(self):
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self.assertEqual(repr(self.reference), "<Columns 'FIRST_COLUMN, SECOND_COLUMN'>")
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def test_str(self):
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self.assertEqual(str(self.reference), 'FIRST_COLUMN, SECOND_COLUMN')
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class IndexNameTests(ColumnsTests):
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def setUp(self):
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def create_index_name(table_name, column_names, suffix):
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return ', '.join("%s_%s_%s" % (table_name, column_name, suffix) for column_name in column_names)
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self.reference = IndexName(
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'table', ['first_column', 'second_column'], 'suffix', create_index_name
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)
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def test_repr(self):
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self.assertEqual(repr(self.reference), "<IndexName 'table_first_column_suffix, table_second_column_suffix'>")
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def test_str(self):
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self.assertEqual(str(self.reference), 'table_first_column_suffix, table_second_column_suffix')
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class ForeignKeyNameTests(IndexNameTests):
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def setUp(self):
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def create_foreign_key_name(table_name, column_names, suffix):
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return ', '.join("%s_%s_%s" % (table_name, column_name, suffix) for column_name in column_names)
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self.reference = ForeignKeyName(
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'table', ['first_column', 'second_column'],
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'to_table', ['to_first_column', 'to_second_column'],
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'%(to_table)s_%(to_column)s_fk',
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create_foreign_key_name,
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)
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def test_references_table(self):
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super().test_references_table()
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self.assertIs(self.reference.references_table('to_table'), True)
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def test_references_column(self):
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super().test_references_column()
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self.assertIs(self.reference.references_column('to_table', 'second_column'), False)
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self.assertIs(self.reference.references_column('to_table', 'to_second_column'), True)
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def test_rename_table_references(self):
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super().test_rename_table_references()
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self.reference.rename_table_references('to_table', 'other_to_table')
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self.assertIs(self.reference.references_table('other_to_table'), True)
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self.assertIs(self.reference.references_table('to_table'), False)
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def test_rename_column_references(self):
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super().test_rename_column_references()
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self.reference.rename_column_references('to_table', 'second_column', 'third_column')
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self.assertIs(self.reference.references_column('table', 'second_column'), True)
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self.assertIs(self.reference.references_column('to_table', 'to_second_column'), True)
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self.reference.rename_column_references('to_table', 'to_first_column', 'to_third_column')
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self.assertIs(self.reference.references_column('to_table', 'to_first_column'), False)
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self.assertIs(self.reference.references_column('to_table', 'to_third_column'), True)
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def test_repr(self):
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self.assertEqual(
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repr(self.reference),
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"<ForeignKeyName 'table_first_column_to_table_to_first_column_fk, "
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"table_second_column_to_table_to_first_column_fk'>"
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)
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def test_str(self):
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self.assertEqual(
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str(self.reference),
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'table_first_column_to_table_to_first_column_fk, '
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'table_second_column_to_table_to_first_column_fk'
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)
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class MockReference:
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def __init__(self, representation, referenced_tables, referenced_columns):
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self.representation = representation
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self.referenced_tables = referenced_tables
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self.referenced_columns = referenced_columns
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def references_table(self, table):
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return table in self.referenced_tables
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def references_column(self, table, column):
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return (table, column) in self.referenced_columns
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def rename_table_references(self, old_table, new_table):
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if old_table in self.referenced_tables:
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self.referenced_tables.remove(old_table)
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self.referenced_tables.add(new_table)
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def rename_column_references(self, table, old_column, new_column):
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column = (table, old_column)
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if column in self.referenced_columns:
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self.referenced_columns.remove(column)
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self.referenced_columns.add((table, new_column))
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def __str__(self):
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return self.representation
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class StatementTests(SimpleTestCase):
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def test_references_table(self):
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statement = Statement('', reference=MockReference('', {'table'}, {}), non_reference='')
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self.assertIs(statement.references_table('table'), True)
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self.assertIs(statement.references_table('other'), False)
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def test_references_column(self):
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statement = Statement('', reference=MockReference('', {}, {('table', 'column')}), non_reference='')
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self.assertIs(statement.references_column('table', 'column'), True)
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self.assertIs(statement.references_column('other', 'column'), False)
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def test_rename_table_references(self):
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reference = MockReference('', {'table'}, {})
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statement = Statement('', reference=reference, non_reference='')
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statement.rename_table_references('table', 'other')
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self.assertEqual(reference.referenced_tables, {'other'})
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def test_rename_column_references(self):
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reference = MockReference('', {}, {('table', 'column')})
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statement = Statement('', reference=reference, non_reference='')
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statement.rename_column_references('table', 'column', 'other')
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self.assertEqual(reference.referenced_columns, {('table', 'other')})
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def test_repr(self):
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reference = MockReference('reference', {}, {})
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statement = Statement("%(reference)s - %(non_reference)s", reference=reference, non_reference='non_reference')
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self.assertEqual(repr(statement), "<Statement 'reference - non_reference'>")
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def test_str(self):
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reference = MockReference('reference', {}, {})
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statement = Statement("%(reference)s - %(non_reference)s", reference=reference, non_reference='non_reference')
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self.assertEqual(str(statement), 'reference - non_reference')
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class ExpressionsTests(TransactionTestCase):
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available_apps = []
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def setUp(self):
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compiler = Person.objects.all().query.get_compiler(connection.alias)
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self.editor = connection.schema_editor()
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self.expressions = Expressions(
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table=Person._meta.db_table,
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expressions=ExpressionList(
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IndexExpression(F('first_name')),
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IndexExpression(F('last_name').desc()),
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IndexExpression(Upper('last_name')),
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).resolve_expression(compiler.query),
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compiler=compiler,
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quote_value=self.editor.quote_value,
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)
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def test_references_table(self):
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self.assertIs(self.expressions.references_table(Person._meta.db_table), True)
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self.assertIs(self.expressions.references_table('other'), False)
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def test_references_column(self):
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table = Person._meta.db_table
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self.assertIs(self.expressions.references_column(table, 'first_name'), True)
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self.assertIs(self.expressions.references_column(table, 'last_name'), True)
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self.assertIs(self.expressions.references_column(table, 'other'), False)
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def test_rename_table_references(self):
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table = Person._meta.db_table
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self.expressions.rename_table_references(table, 'other')
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self.assertIs(self.expressions.references_table(table), False)
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self.assertIs(self.expressions.references_table('other'), True)
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self.assertIn(
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'%s.%s' % (
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self.editor.quote_name('other'),
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self.editor.quote_name('first_name'),
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),
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str(self.expressions),
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)
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def test_rename_table_references_without_alias(self):
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compiler = Query(Person, alias_cols=False).get_compiler(connection=connection)
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table = Person._meta.db_table
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expressions = Expressions(
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table=table,
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expressions=ExpressionList(
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IndexExpression(Upper('last_name')),
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IndexExpression(F('first_name')),
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).resolve_expression(compiler.query),
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compiler=compiler,
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quote_value=self.editor.quote_value,
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)
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expressions.rename_table_references(table, 'other')
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self.assertIs(expressions.references_table(table), False)
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self.assertIs(expressions.references_table('other'), True)
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expected_str = '(UPPER(%s)), %s' % (
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self.editor.quote_name('last_name'),
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self.editor.quote_name('first_name'),
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)
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self.assertEqual(str(expressions), expected_str)
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def test_rename_column_references(self):
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table = Person._meta.db_table
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self.expressions.rename_column_references(table, 'first_name', 'other')
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self.assertIs(self.expressions.references_column(table, 'other'), True)
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self.assertIs(self.expressions.references_column(table, 'first_name'), False)
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self.assertIn(
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'%s.%s' % (self.editor.quote_name(table), self.editor.quote_name('other')),
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str(self.expressions),
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)
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def test_str(self):
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table_name = self.editor.quote_name(Person._meta.db_table)
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expected_str = '%s.%s, %s.%s DESC, (UPPER(%s.%s))' % (
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table_name,
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self.editor.quote_name('first_name'),
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table_name,
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self.editor.quote_name('last_name'),
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table_name,
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self.editor.quote_name('last_name'),
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)
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self.assertEqual(str(self.expressions), expected_str)
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