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Ensure cursors are closed when no longer needed.

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This commit touchs various parts of the code base and test framework. Any
found usage of opening a cursor for the sake of initializing a connection
has been replaced with 'ensure_connection()'.
This commit is contained in:
Michael Manfre 2014-01-09 10:05:15 -05:00
parent 0837eacc4e
commit 3ffeb93186
31 changed files with 657 additions and 615 deletions
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72
tests/migrations/test_operations.py
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@ -19,15 +19,15 @@ class OperationTests(MigrationTestBase):
Creates a test model state and database table.
"""
# Delete the tables if they already exist
cursor = connection.cursor()
try:
cursor.execute("DROP TABLE %s_pony" % app_label)
except:
pass
try:
cursor.execute("DROP TABLE %s_stable" % app_label)
except:
pass
with connection.cursor() as cursor:
try:
cursor.execute("DROP TABLE %s_pony" % app_label)
except:
pass
try:
cursor.execute("DROP TABLE %s_stable" % app_label)
except:
pass
# Make the "current" state
operations = [migrations.CreateModel(
"Pony",
@ -348,21 +348,21 @@ class OperationTests(MigrationTestBase):
operation.state_forwards("test_alflpkfk", new_state)
self.assertIsInstance(project_state.models["test_alflpkfk", "pony"].get_field_by_name("id"), models.AutoField)
self.assertIsInstance(new_state.models["test_alflpkfk", "pony"].get_field_by_name("id"), models.FloatField)
def assertIdTypeEqualsFkType(self):
with connection.cursor() as cursor:
id_type = [c.type_code for c in connection.introspection.get_table_description(cursor, "test_alflpkfk_pony") if c.name == "id"][0]
fk_type = [c.type_code for c in connection.introspection.get_table_description(cursor, "test_alflpkfk_rider") if c.name == "pony_id"][0]
self.assertEqual(id_type, fk_type)
assertIdTypeEqualsFkType()
# Test the database alteration
id_type = [c.type_code for c in connection.introspection.get_table_description(connection.cursor(), "test_alflpkfk_pony") if c.name == "id"][0]
fk_type = [c.type_code for c in connection.introspection.get_table_description(connection.cursor(), "test_alflpkfk_rider") if c.name == "pony_id"][0]
self.assertEqual(id_type, fk_type)
with connection.schema_editor() as editor:
operation.database_forwards("test_alflpkfk", editor, project_state, new_state)
id_type = [c.type_code for c in connection.introspection.get_table_description(connection.cursor(), "test_alflpkfk_pony") if c.name == "id"][0]
fk_type = [c.type_code for c in connection.introspection.get_table_description(connection.cursor(), "test_alflpkfk_rider") if c.name == "pony_id"][0]
self.assertEqual(id_type, fk_type)
assertIdTypeEqualsFkType()
# And test reversal
with connection.schema_editor() as editor:
operation.database_backwards("test_alflpkfk", editor, new_state, project_state)
id_type = [c.type_code for c in connection.introspection.get_table_description(connection.cursor(), "test_alflpkfk_pony") if c.name == "id"][0]
fk_type = [c.type_code for c in connection.introspection.get_table_description(connection.cursor(), "test_alflpkfk_rider") if c.name == "pony_id"][0]
self.assertEqual(id_type, fk_type)
assertIdTypeEqualsFkType()
def test_rename_field(self):
"""
@ -400,24 +400,24 @@ class OperationTests(MigrationTestBase):
self.assertEqual(len(project_state.models["test_alunto", "pony"].options.get("unique_together", set())), 0)
self.assertEqual(len(new_state.models["test_alunto", "pony"].options.get("unique_together", set())), 1)
# Make sure we can insert duplicate rows
cursor = connection.cursor()
cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (1, 1, 1)")
cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (2, 1, 1)")
cursor.execute("DELETE FROM test_alunto_pony")
# Test the database alteration
with connection.schema_editor() as editor:
operation.database_forwards("test_alunto", editor, project_state, new_state)
cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (1, 1, 1)")
with self.assertRaises(IntegrityError):
with atomic():
cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (2, 1, 1)")
cursor.execute("DELETE FROM test_alunto_pony")
# And test reversal
with connection.schema_editor() as editor:
operation.database_backwards("test_alunto", editor, new_state, project_state)
cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (1, 1, 1)")
cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (2, 1, 1)")
cursor.execute("DELETE FROM test_alunto_pony")
with connection.cursor() as cursor:
cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (1, 1, 1)")
cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (2, 1, 1)")
cursor.execute("DELETE FROM test_alunto_pony")
# Test the database alteration
with connection.schema_editor() as editor:
operation.database_forwards("test_alunto", editor, project_state, new_state)
cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (1, 1, 1)")
with self.assertRaises(IntegrityError):
with atomic():
cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (2, 1, 1)")
cursor.execute("DELETE FROM test_alunto_pony")
# And test reversal
with connection.schema_editor() as editor:
operation.database_backwards("test_alunto", editor, new_state, project_state)
cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (1, 1, 1)")
cursor.execute("INSERT INTO test_alunto_pony (id, pink, weight) VALUES (2, 1, 1)")
cursor.execute("DELETE FROM test_alunto_pony")
# Test flat unique_together
operation = migrations.AlterUniqueTogether("Pony", ("pink", "weight"))
operation.state_forwards("test_alunto", new_state)