mirror of
https://github.com/django/django.git
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341 lines
13 KiB
Python
341 lines
13 KiB
Python
from django.db import connection
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from django.db.backends.ddl_references import (
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Columns,
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Expressions,
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ForeignKeyName,
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IndexName,
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Statement,
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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(
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repr(self.reference), "<Columns 'FIRST_COLUMN, SECOND_COLUMN'>"
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)
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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(
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"%s_%s_%s" % (table_name, column_name, suffix)
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for column_name in column_names
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)
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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(
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repr(self.reference),
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"<IndexName 'table_first_column_suffix, table_second_column_suffix'>",
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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), "table_first_column_suffix, table_second_column_suffix"
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)
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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(
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"%s_%s_%s" % (table_name, column_name, suffix)
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for column_name in column_names
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)
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self.reference = ForeignKeyName(
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"table",
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["first_column", "second_column"],
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"to_table",
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["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(
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self.reference.references_column("to_table", "second_column"), False
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)
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self.assertIs(
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self.reference.references_column("to_table", "to_second_column"), True
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)
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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(
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"to_table", "second_column", "third_column"
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)
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self.assertIs(self.reference.references_column("table", "second_column"), True)
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self.assertIs(
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self.reference.references_column("to_table", "to_second_column"), True
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)
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self.reference.rename_column_references(
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"to_table", "to_first_column", "to_third_column"
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)
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self.assertIs(
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self.reference.references_column("to_table", "to_first_column"), False
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)
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self.assertIs(
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self.reference.references_column("to_table", "to_third_column"), True
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)
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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__(
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self, representation, referenced_tables, referenced_columns, referenced_indexes
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):
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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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self.referenced_indexes = referenced_indexes
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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 references_index(self, table, index):
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return (table, index) in self.referenced_indexes
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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(
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"", reference=MockReference("", {"table"}, {}, {}), non_reference=""
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)
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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(
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"",
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reference=MockReference("", {}, {("table", "column")}, {}),
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non_reference="",
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)
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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_references_index(self):
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statement = Statement(
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"",
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reference=MockReference("", {}, {}, {("table", "index")}),
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non_reference="",
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)
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self.assertIs(statement.references_index("table", "index"), True)
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self.assertIs(statement.references_index("other", "index"), 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(
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"%(reference)s - %(non_reference)s",
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reference=reference,
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non_reference="non_reference",
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)
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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(
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"%(reference)s - %(non_reference)s",
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reference=reference,
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non_reference="non_reference",
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)
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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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% (
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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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