Fixing some transaction handling in MySQL with schema alterations

.travis.yml

@@ -35,9 +35,9 @@ matrix:
     - python: 3.4
       env: DJANGO=django==1.7.1 DB_ENGINE="django.db.backends.mysql" DB_NAME="test_project" DB_USER="travis"
   allow_failures:
-    - DJANGO=django==1.7.1
-    - DJANGO=django==1.7.1 DB_ENGINE="django.db.backends.postgresql_psycopg2" DB_NAME="test_project" DB_USER="postgres"
-    - DJANGO=django==1.7.1 DB_ENGINE="django.db.backends.mysql" DB_NAME="test_project" DB_USER="travis"
+    - env: DJANGO=django==1.7.1
+    - env: DJANGO=django==1.7.1 DB_ENGINE="django.db.backends.postgresql_psycopg2" DB_NAME="test_project" DB_USER="postgres"
+    - env: DJANGO=django==1.7.1 DB_ENGINE="django.db.backends.mysql" DB_NAME="test_project" DB_USER="travis"
   fast_finish: true
 services:
   - postgresql

src/watson/backends.py

@@ -5,7 +5,7 @@ from __future__ import unicode_literals
 import re, abc
 
 from django.contrib.contenttypes.models import ContentType
-from django.db import connection
+from django.db import connection, transaction
 from django.db.models import Q
 from django.utils.encoding import force_text
 from django.utils import six
@@ -181,6 +181,7 @@ class PostgresSearchBackend(SearchBackend):
         """)
         return bool(cursor.fetchall())
     
+    @transaction.atomic()
     def do_install(self):
         """Executes the PostgreSQL specific SQL code to install django-watson."""
         connection.cursor().execute("""
@@ -220,6 +221,7 @@ class PostgresSearchBackend(SearchBackend):
             search_config = self.search_config
         ))
 
+    @transaction.atomic()
     def do_uninstall(self):
         """Executes the PostgreSQL specific SQL code to uninstall django-watson."""
         connection.cursor().execute("""

src/watson/management/commands/installwatson.py

@@ -3,7 +3,6 @@
 from __future__ import unicode_literals
 
 from django.core.management.base import NoArgsCommand
-from django.db import transaction
 
 from watson.registration import get_backend
 
@@ -12,7 +11,6 @@ class Command(NoArgsCommand):
 
     help = "Creates the database indices needed by django-watson."
     
-    @transaction.atomic()
     def handle_noargs(self, **options):
         """Runs the management command."""
         verbosity = int(options.get("verbosity", 1))

src/watson/management/commands/uninstallwatson.py

@@ -3,7 +3,6 @@
 from __future__ import unicode_literals
 
 from django.core.management.base import NoArgsCommand
-from django.db import transaction
 
 from watson.registration import get_backend
 
@@ -12,7 +11,6 @@ class Command(NoArgsCommand):
 
     help = "Destroys the database indices needed by django-watson."
     
-    @transaction.atomic()
     def handle_noargs(self, **options):
         """Runs the management command."""
         verbosity = int(options.get("verbosity", 1))