Edit: test_autogen_fks.py
from sqlalchemy import Column from sqlalchemy import ForeignKeyConstraint from sqlalchemy import Integer from sqlalchemy import MetaData from sqlalchemy import String from sqlalchemy import Table from ._autogen_fixtures import AutogenFixtureTest from ...testing import combinations from ...testing import config from ...testing import eq_ from ...testing import mock from ...testing import TestBase class AutogenerateForeignKeysTest(AutogenFixtureTest, TestBase): __backend__ = True __requires__ = ("foreign_key_constraint_reflection",) def test_remove_fk(self): m1 = MetaData() m2 = MetaData() Table( "some_table", m1, Column("test", String(10), primary_key=True), ) Table( "user", m1, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("test2", String(10)), ForeignKeyConstraint(["test2"], ["some_table.test"]), ) Table( "some_table", m2, Column("test", String(10), primary_key=True), ) Table( "user", m2, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("test2", String(10)), ) diffs = self._fixture(m1, m2) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["test2"], "some_table", ["test"], conditional_name="servergenerated", ) def test_add_fk(self): m1 = MetaData() m2 = MetaData() Table( "some_table", m1, Column("id", Integer, primary_key=True), Column("test", String(10)), ) Table( "user", m1, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("test2", String(10)), ) Table( "some_table", m2, Column("id", Integer, primary_key=True), Column("test", String(10)), ) Table( "user", m2, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("test2", String(10)), ForeignKeyConstraint(["test2"], ["some_table.test"]), ) diffs = self._fixture(m1, m2) self._assert_fk_diff( diffs[0], "add_fk", "user", ["test2"], "some_table", ["test"] ) def test_no_change(self): m1 = MetaData() m2 = MetaData() Table( "some_table", m1, Column("id", Integer, primary_key=True), Column("test", String(10)), ) Table( "user", m1, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("test2", Integer), ForeignKeyConstraint(["test2"], ["some_table.id"]), ) Table( "some_table", m2, Column("id", Integer, primary_key=True), Column("test", String(10)), ) Table( "user", m2, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("test2", Integer), ForeignKeyConstraint(["test2"], ["some_table.id"]), ) diffs = self._fixture(m1, m2) eq_(diffs, []) def test_no_change_composite_fk(self): m1 = MetaData() m2 = MetaData() Table( "some_table", m1, Column("id_1", String(10), primary_key=True), Column("id_2", String(10), primary_key=True), ) Table( "user", m1, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("other_id_1", String(10)), Column("other_id_2", String(10)), ForeignKeyConstraint( ["other_id_1", "other_id_2"], ["some_table.id_1", "some_table.id_2"], ), ) Table( "some_table", m2, Column("id_1", String(10), primary_key=True), Column("id_2", String(10), primary_key=True), ) Table( "user", m2, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("other_id_1", String(10)), Column("other_id_2", String(10)), ForeignKeyConstraint( ["other_id_1", "other_id_2"], ["some_table.id_1", "some_table.id_2"], ), ) diffs = self._fixture(m1, m2) eq_(diffs, []) def test_casing_convention_changed_so_put_drops_first(self): m1 = MetaData() m2 = MetaData() Table( "some_table", m1, Column("test", String(10), primary_key=True), ) Table( "user", m1, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("test2", String(10)), ForeignKeyConstraint(["test2"], ["some_table.test"], name="MyFK"), ) Table( "some_table", m2, Column("test", String(10), primary_key=True), ) # foreign key autogen currently does not take "name" into account, # so change the def just for the purposes of testing the # add/drop order for now. Table( "user", m2, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("test2", String(10)), ForeignKeyConstraint(["a1"], ["some_table.test"], name="myfk"), ) diffs = self._fixture(m1, m2) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["test2"], "some_table", ["test"], name="MyFK" if config.requirements.fk_names.enabled else None, ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["a1"], "some_table", ["test"], name="myfk", ) def test_add_composite_fk_with_name(self): m1 = MetaData() m2 = MetaData() Table( "some_table", m1, Column("id_1", String(10), primary_key=True), Column("id_2", String(10), primary_key=True), ) Table( "user", m1, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("other_id_1", String(10)), Column("other_id_2", String(10)), ) Table( "some_table", m2, Column("id_1", String(10), primary_key=True), Column("id_2", String(10), primary_key=True), ) Table( "user", m2, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("other_id_1", String(10)), Column("other_id_2", String(10)), ForeignKeyConstraint( ["other_id_1", "other_id_2"], ["some_table.id_1", "some_table.id_2"], name="fk_test_name", ), ) diffs = self._fixture(m1, m2) self._assert_fk_diff( diffs[0], "add_fk", "user", ["other_id_1", "other_id_2"], "some_table", ["id_1", "id_2"], name="fk_test_name", ) @config.requirements.no_name_normalize def test_remove_composite_fk(self): m1 = MetaData() m2 = MetaData() Table( "some_table", m1, Column("id_1", String(10), primary_key=True), Column("id_2", String(10), primary_key=True), ) Table( "user", m1, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("other_id_1", String(10)), Column("other_id_2", String(10)), ForeignKeyConstraint( ["other_id_1", "other_id_2"], ["some_table.id_1", "some_table.id_2"], name="fk_test_name", ), ) Table( "some_table", m2, Column("id_1", String(10), primary_key=True), Column("id_2", String(10), primary_key=True), ) Table( "user", m2, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("a1", String(10), server_default="x"), Column("other_id_1", String(10)), Column("other_id_2", String(10)), ) diffs = self._fixture(m1, m2) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["other_id_1", "other_id_2"], "some_table", ["id_1", "id_2"], conditional_name="fk_test_name", ) def test_add_fk_colkeys(self): m1 = MetaData() m2 = MetaData() Table( "some_table", m1, Column("id_1", String(10), primary_key=True), Column("id_2", String(10), primary_key=True), ) Table( "user", m1, Column("id", Integer, primary_key=True), Column("other_id_1", String(10)), Column("other_id_2", String(10)), ) Table( "some_table", m2, Column("id_1", String(10), key="tid1", primary_key=True), Column("id_2", String(10), key="tid2", primary_key=True), ) Table( "user", m2, Column("id", Integer, primary_key=True), Column("other_id_1", String(10), key="oid1"), Column("other_id_2", String(10), key="oid2"), ForeignKeyConstraint( ["oid1", "oid2"], ["some_table.tid1", "some_table.tid2"], name="fk_test_name", ), ) diffs = self._fixture(m1, m2) self._assert_fk_diff( diffs[0], "add_fk", "user", ["other_id_1", "other_id_2"], "some_table", ["id_1", "id_2"], name="fk_test_name", ) def test_no_change_colkeys(self): m1 = MetaData() m2 = MetaData() Table( "some_table", m1, Column("id_1", String(10), primary_key=True), Column("id_2", String(10), primary_key=True), ) Table( "user", m1, Column("id", Integer, primary_key=True), Column("other_id_1", String(10)), Column("other_id_2", String(10)), ForeignKeyConstraint( ["other_id_1", "other_id_2"], ["some_table.id_1", "some_table.id_2"], ), ) Table( "some_table", m2, Column("id_1", String(10), key="tid1", primary_key=True), Column("id_2", String(10), key="tid2", primary_key=True), ) Table( "user", m2, Column("id", Integer, primary_key=True), Column("other_id_1", String(10), key="oid1"), Column("other_id_2", String(10), key="oid2"), ForeignKeyConstraint( ["oid1", "oid2"], ["some_table.tid1", "some_table.tid2"] ), ) diffs = self._fixture(m1, m2) eq_(diffs, []) class IncludeHooksTest(AutogenFixtureTest, TestBase): __backend__ = True __requires__ = ("fk_names",) @combinations(("object",), ("name",)) @config.requirements.no_name_normalize def test_remove_connection_fk(self, hook_type): m1 = MetaData() m2 = MetaData() ref = Table( "ref", m1, Column("id", Integer, primary_key=True), ) t1 = Table( "t", m1, Column("x", Integer), Column("y", Integer), ) t1.append_constraint( ForeignKeyConstraint([t1.c.x], [ref.c.id], name="fk1") ) t1.append_constraint( ForeignKeyConstraint([t1.c.y], [ref.c.id], name="fk2") ) ref = Table( "ref", m2, Column("id", Integer, primary_key=True), ) Table( "t", m2, Column("x", Integer), Column("y", Integer), ) if hook_type == "object": def include_object(object_, name, type_, reflected, compare_to): return not ( isinstance(object_, ForeignKeyConstraint) and type_ == "foreign_key_constraint" and reflected and name == "fk1" ) diffs = self._fixture(m1, m2, object_filters=include_object) elif hook_type == "name": def include_name(name, type_, parent_names): if name == "fk1": if type_ == "index": # MariaDB thing return True eq_(type_, "foreign_key_constraint") eq_( parent_names, { "schema_name": None, "table_name": "t", "schema_qualified_table_name": "t", }, ) return False else: return True diffs = self._fixture(m1, m2, name_filters=include_name) self._assert_fk_diff( diffs[0], "remove_fk", "t", ["y"], "ref", ["id"], conditional_name="fk2", ) eq_(len(diffs), 1) def test_add_metadata_fk(self): m1 = MetaData() m2 = MetaData() Table( "ref", m1, Column("id", Integer, primary_key=True), ) Table( "t", m1, Column("x", Integer), Column("y", Integer), ) ref = Table( "ref", m2, Column("id", Integer, primary_key=True), ) t2 = Table( "t", m2, Column("x", Integer), Column("y", Integer), ) t2.append_constraint( ForeignKeyConstraint([t2.c.x], [ref.c.id], name="fk1") ) t2.append_constraint( ForeignKeyConstraint([t2.c.y], [ref.c.id], name="fk2") ) def include_object(object_, name, type_, reflected, compare_to): return not ( isinstance(object_, ForeignKeyConstraint) and type_ == "foreign_key_constraint" and not reflected and name == "fk1" ) diffs = self._fixture(m1, m2, object_filters=include_object) self._assert_fk_diff( diffs[0], "add_fk", "t", ["y"], "ref", ["id"], name="fk2" ) eq_(len(diffs), 1) @combinations(("object",), ("name",)) @config.requirements.no_name_normalize def test_change_fk(self, hook_type): m1 = MetaData() m2 = MetaData() r1a = Table( "ref_a", m1, Column("a", Integer, primary_key=True), ) Table( "ref_b", m1, Column("a", Integer, primary_key=True), Column("b", Integer, primary_key=True), ) t1 = Table( "t", m1, Column("x", Integer), Column("y", Integer), Column("z", Integer), ) t1.append_constraint( ForeignKeyConstraint([t1.c.x], [r1a.c.a], name="fk1") ) t1.append_constraint( ForeignKeyConstraint([t1.c.y], [r1a.c.a], name="fk2") ) Table( "ref_a", m2, Column("a", Integer, primary_key=True), ) r2b = Table( "ref_b", m2, Column("a", Integer, primary_key=True), Column("b", Integer, primary_key=True), ) t2 = Table( "t", m2, Column("x", Integer), Column("y", Integer), Column("z", Integer), ) t2.append_constraint( ForeignKeyConstraint( [t2.c.x, t2.c.z], [r2b.c.a, r2b.c.b], name="fk1" ) ) t2.append_constraint( ForeignKeyConstraint( [t2.c.y, t2.c.z], [r2b.c.a, r2b.c.b], name="fk2" ) ) if hook_type == "object": def include_object(object_, name, type_, reflected, compare_to): return not ( isinstance(object_, ForeignKeyConstraint) and type_ == "foreign_key_constraint" and name == "fk1" ) diffs = self._fixture(m1, m2, object_filters=include_object) elif hook_type == "name": def include_name(name, type_, parent_names): if type_ == "index": return True # MariaDB thing if name == "fk1": eq_(type_, "foreign_key_constraint") eq_( parent_names, { "schema_name": None, "table_name": "t", "schema_qualified_table_name": "t", }, ) return False else: return True diffs = self._fixture(m1, m2, name_filters=include_name) if hook_type == "object": self._assert_fk_diff( diffs[0], "remove_fk", "t", ["y"], "ref_a", ["a"], name="fk2" ) self._assert_fk_diff( diffs[1], "add_fk", "t", ["y", "z"], "ref_b", ["a", "b"], name="fk2", ) eq_(len(diffs), 2) elif hook_type == "name": eq_( {(d[0], d[1].name) for d in diffs}, {("add_fk", "fk2"), ("add_fk", "fk1"), ("remove_fk", "fk2")}, ) class AutogenerateFKOptionsTest(AutogenFixtureTest, TestBase): __backend__ = True def _fk_opts_fixture(self, old_opts, new_opts): m1 = MetaData() m2 = MetaData() Table( "some_table", m1, Column("id", Integer, primary_key=True), Column("test", String(10)), ) Table( "user", m1, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("tid", Integer), ForeignKeyConstraint(["tid"], ["some_table.id"], **old_opts), ) Table( "some_table", m2, Column("id", Integer, primary_key=True), Column("test", String(10)), ) Table( "user", m2, Column("id", Integer, primary_key=True), Column("name", String(50), nullable=False), Column("tid", Integer), ForeignKeyConstraint(["tid"], ["some_table.id"], **new_opts), ) return self._fixture(m1, m2) @config.requirements.fk_ondelete_is_reflected def test_add_ondelete(self): diffs = self._fk_opts_fixture({}, {"ondelete": "cascade"}) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], ondelete=None, conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], ondelete="cascade", ) @config.requirements.fk_ondelete_is_reflected def test_remove_ondelete(self): diffs = self._fk_opts_fixture({"ondelete": "CASCADE"}, {}) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], ondelete="CASCADE", conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], ondelete=None, ) def test_nochange_ondelete(self): """test case sensitivity""" diffs = self._fk_opts_fixture( {"ondelete": "caSCAde"}, {"ondelete": "CasCade"} ) eq_(diffs, []) @config.requirements.fk_onupdate_is_reflected def test_add_onupdate(self): diffs = self._fk_opts_fixture({}, {"onupdate": "cascade"}) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], onupdate=None, conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], onupdate="cascade", ) @config.requirements.fk_onupdate_is_reflected def test_remove_onupdate(self): diffs = self._fk_opts_fixture({"onupdate": "CASCADE"}, {}) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], onupdate="CASCADE", conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], onupdate=None, ) @config.requirements.fk_onupdate def test_nochange_onupdate(self): """test case sensitivity""" diffs = self._fk_opts_fixture( {"onupdate": "caSCAde"}, {"onupdate": "CasCade"} ) eq_(diffs, []) @config.requirements.fk_ondelete_restrict def test_nochange_ondelete_restrict(self): """test the RESTRICT option which MySQL doesn't report on""" diffs = self._fk_opts_fixture( {"ondelete": "restrict"}, {"ondelete": "restrict"} ) eq_(diffs, []) @config.requirements.fk_onupdate_restrict def test_nochange_onupdate_restrict(self): """test the RESTRICT option which MySQL doesn't report on""" diffs = self._fk_opts_fixture( {"onupdate": "restrict"}, {"onupdate": "restrict"} ) eq_(diffs, []) @config.requirements.fk_ondelete_noaction def test_nochange_ondelete_noaction(self): """test the NO ACTION option which generally comes back as None""" diffs = self._fk_opts_fixture( {"ondelete": "no action"}, {"ondelete": "no action"} ) eq_(diffs, []) @config.requirements.fk_onupdate def test_nochange_onupdate_noaction(self): """test the NO ACTION option which generally comes back as None""" diffs = self._fk_opts_fixture( {"onupdate": "no action"}, {"onupdate": "no action"} ) eq_(diffs, []) @config.requirements.fk_ondelete_restrict def test_change_ondelete_from_restrict(self): """test the RESTRICT option which MySQL doesn't report on""" # note that this is impossible to detect if we change # from RESTRICT to NO ACTION on MySQL. diffs = self._fk_opts_fixture( {"ondelete": "restrict"}, {"ondelete": "cascade"} ) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], onupdate=None, ondelete=mock.ANY, # MySQL reports None, PG reports RESTRICT conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], onupdate=None, ondelete="cascade", ) @config.requirements.fk_ondelete_restrict def test_change_onupdate_from_restrict(self): """test the RESTRICT option which MySQL doesn't report on""" # note that this is impossible to detect if we change # from RESTRICT to NO ACTION on MySQL. diffs = self._fk_opts_fixture( {"onupdate": "restrict"}, {"onupdate": "cascade"} ) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], onupdate=mock.ANY, # MySQL reports None, PG reports RESTRICT ondelete=None, conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], onupdate="cascade", ondelete=None, ) @config.requirements.fk_ondelete_is_reflected @config.requirements.fk_onupdate_is_reflected def test_ondelete_onupdate_combo(self): diffs = self._fk_opts_fixture( {"onupdate": "CASCADE", "ondelete": "SET NULL"}, {"onupdate": "RESTRICT", "ondelete": "RESTRICT"}, ) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], onupdate="CASCADE", ondelete="SET NULL", conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], onupdate="RESTRICT", ondelete="RESTRICT", ) @config.requirements.fk_initially def test_add_initially_deferred(self): diffs = self._fk_opts_fixture({}, {"initially": "deferred"}) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], initially=None, conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], initially="deferred", ) @config.requirements.fk_initially def test_remove_initially_deferred(self): diffs = self._fk_opts_fixture({"initially": "deferred"}, {}) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], initially="DEFERRED", deferrable=True, conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], initially=None, ) @config.requirements.fk_deferrable @config.requirements.fk_initially def test_add_initially_immediate_plus_deferrable(self): diffs = self._fk_opts_fixture( {}, {"initially": "immediate", "deferrable": True} ) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], initially=None, conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], initially="immediate", deferrable=True, ) @config.requirements.fk_deferrable @config.requirements.fk_initially def test_remove_initially_immediate_plus_deferrable(self): diffs = self._fk_opts_fixture( {"initially": "immediate", "deferrable": True}, {} ) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], initially=None, # immediate is the default deferrable=True, conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], initially=None, deferrable=None, ) @config.requirements.fk_initially @config.requirements.fk_deferrable def test_add_initially_deferrable_nochange_one(self): diffs = self._fk_opts_fixture( {"deferrable": True, "initially": "immediate"}, {"deferrable": True, "initially": "immediate"}, ) eq_(diffs, []) @config.requirements.fk_initially @config.requirements.fk_deferrable def test_add_initially_deferrable_nochange_two(self): diffs = self._fk_opts_fixture( {"deferrable": True, "initially": "deferred"}, {"deferrable": True, "initially": "deferred"}, ) eq_(diffs, []) @config.requirements.fk_initially @config.requirements.fk_deferrable def test_add_initially_deferrable_nochange_three(self): diffs = self._fk_opts_fixture( {"deferrable": None, "initially": "deferred"}, {"deferrable": None, "initially": "deferred"}, ) eq_(diffs, []) @config.requirements.fk_deferrable def test_add_deferrable(self): diffs = self._fk_opts_fixture({}, {"deferrable": True}) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], deferrable=None, conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], deferrable=True, ) @config.requirements.fk_deferrable_is_reflected def test_remove_deferrable(self): diffs = self._fk_opts_fixture({"deferrable": True}, {}) self._assert_fk_diff( diffs[0], "remove_fk", "user", ["tid"], "some_table", ["id"], deferrable=True, conditional_name="servergenerated", ) self._assert_fk_diff( diffs[1], "add_fk", "user", ["tid"], "some_table", ["id"], deferrable=None, )
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