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