Fixed #26542 -- Fixed quoting in CreateExtension operation.

    def database_forwards(self, app_label, schema_editor, from_state, to_state):

        if schema_editor.connection.vendor != 'postgresql':

            return

        schema_editor.execute("CREATE EXTENSION IF NOT EXISTS %s" % self.name)

        schema_editor.execute("CREATE EXTENSION IF NOT EXISTS %s" % schema_editor.quote_name(self.name))

    def database_backwards(self, app_label, schema_editor, from_state, to_state):

        schema_editor.execute("DROP EXTENSION %s" % self.name)

        schema_editor.execute("DROP EXTENSION %s" % schema_editor.quote_name(self.name))

    def describe(self):

        return "Creates extension %s" % self.name

try:

    from django.contrib.postgres.operations import (

        HStoreExtension, UnaccentExtension,

        CreateExtension, HStoreExtension, UnaccentExtension,

    )

except ImportError:

    from django.test import mock

    CreateExtension = mock.Mock()

    HStoreExtension = mock.Mock()

    UnaccentExtension = mock.Mock()

class Migration(migrations.Migration):

    dependencies = [

    ]

    operations = [

        # Ensure CreateExtension quotes extension names by creating one with a

        # dash in its name.

        CreateExtension('uuid-ossp'),

        HStoreExtension(),

        UnaccentExtension(),

    ]