3197 DB schema: change_properties to text

Alters change_properties.propery_value from String(1024) to Text

http://trac.buildbot.net/ticket/3197

master/buildbot/db/changes.py

@@ -137,8 +137,6 @@ def thd(conn):
                 for i in inserts:
                     self.checkLength(tbl.c.property_name,
                                      i['property_name'])
-                    self.checkLength(tbl.c.property_value,
-                                     i['property_value'])
 
                 conn.execute(tbl.insert(), inserts)
             if uid:

master/buildbot/db/migrate/versions/048_change_properties_to_text.py

@@ -0,0 +1,34 @@
+# This file is part of Buildbot.  Buildbot is free software: you can
+# redistribute it and/or modify it under the terms of the GNU General Public
+# License as published by the Free Software Foundation, version 2.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc., 51
+# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Copyright Buildbot Team Members
+
+import sqlalchemy as sa
+from migrate import changeset
+
+
+def upgrade(migrate_engine):
+    metadata = sa.MetaData()
+    metadata.bind = migrate_engine
+
+    if migrate_engine.dialect.name == "postgresql":
+        # changeset.alter_column has no effect on postgres, so we do this with raw sql
+        migrate_engine.execute("alter table change_properties alter column property_value type text")
+
+    else:
+        # Commit messages can get too big for the normal 1024 String limit.
+        changeset.alter_column(
+            sa.Column('property_value', sa.Text, nullable=False),
+            table='change_properties',
+            metadata=metadata,
+            engine=migrate_engine)

master/buildbot/db/model.py

@@ -314,7 +314,7 @@ class Model(base.DBConnectorComponent):
                   nullable=False),
         sa.Column('property_name', sa.String(256), nullable=False),
         # JSON-encoded tuple of (value, source)
-        sa.Column('property_value', sa.String(1024), nullable=False),
+        sa.Column('property_value', sa.Text, nullable=False),
     )
 
     # users associated with this change; this allows multiple users for

master/buildbot/newsfragments/db_schema_change_properties.bugfix

@@ -0,0 +1 @@
+Change properties value changed to type text and can be at least (tested for) 4096 bytes. This was previously max 1024 bytes. Requires upgrade master. (:bug:`3197`)

master/buildbot/test/unit/test_db_migrate_versions_048_change_properties_to_text.py

@@ -0,0 +1,72 @@
+# This file is part of Buildbot.  Buildbot is free software: you can
+# redistribute it and/or modify it under the terms of the GNU General Public
+# License as published by the Free Software Foundation, version 2.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc., 51
+# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Copyright Buildbot Team Members
+
+from random import choice
+from string import ascii_lowercase
+import sqlalchemy as sa
+from twisted.trial import unittest
+from buildbot.test.util import migration
+from buildbot.util import sautils
+
+
+class Migration(migration.MigrateTestMixin, unittest.TestCase):
+
+    def setUp(self):
+        return self.setUpMigrateTest()
+
+    def tearDown(self):
+        return self.tearDownMigrateTest()
+
+    def create_table_thd(self, conn):
+        metadata = sa.MetaData()
+        metadata.bind = conn
+
+        change_properties = sautils.Table(
+            'change_properties', metadata,
+            sa.Column('changeid', sa.Integer, nullable=False),
+            sa.Column('property_name', sa.String(256), nullable=False),
+            sa.Column('property_value', sa.String(1024), nullable=False),
+        )
+
+        change_properties.create()
+
+    def test_update(self):
+        def setup_thd(conn):
+            self.create_table_thd(conn)
+
+        def verify_thd(conn):
+            metadata = sa.MetaData()
+            metadata.bind = conn
+            random_length = 4096
+            random_string = ''.join(choice(ascii_lowercase) for byte in range(random_length))
+
+            # Test column type is text
+            change_properties = sautils.Table('change_properties', metadata, autoload=True)
+            self.assertIsInstance(change_properties.c.property_value.type, sa.Text)
+
+            # Test insert random string
+            conn.execute(change_properties.insert(), [
+                dict(changeid=1,
+                     property_name="test_change_properties_property_value_length",
+                     property_value=random_string),
+            ])
+
+            # Test db string length
+            # Using raw sql due to error via sa
+            # q = conn.execute(sa.select([sa.func.length(change_properties.c.property_value)]).where(changeid==1))
+            q = conn.execute("select length(property_value) from change_properties where changeid == 1")
+            [ self.assertEqual(q_length[0], random_length) for q_length in q ]
+
+        return self.do_test_migration(47, 48, setup_thd, verify_thd)