Add openid fix migration script

Users who previously had a '%20' in their openstackids currently aren't able
to access their data on RefStack. This is because a '.' has taken the place of
'%20' in a recent openstack id update. This migration will reflect this change
in the database.

Reference: https://review.openstack.org/#/c/427889/

Change-Id: I58c595ea3467ddd94cd26a8ec7e284561a0dc02d

refstack/db/migrations/alembic/versions/434be17a6ec3_fix_openids_with_space.py

@@ -0,0 +1,64 @@
+"""Fix openids with spaces.
+
+A change in the openstackid naming made is so IDs with spaces
+are trimmed, so %20 are no longer in the openid url. This migration
+will replace any '%20' with a '.' in each openid.
+
+Revision ID: 434be17a6ec3
+Revises: 59df512e82f
+Create Date: 2017-03-23 12:20:08.219294
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '434be17a6ec3'
+down_revision = '59df512e82f'
+MYSQL_CHARSET = 'utf8'
+
+from alembic import op
+
+
+def upgrade():
+    """Upgrade DB."""
+    conn = op.get_bind()
+    # Need to disable FOREIGN_KEY_CHECKS as a lot of tables reference the
+    # openid in the user table.
+    conn.execute("SET FOREIGN_KEY_CHECKS=0")
+    res = conn.execute("select * from user where openid LIKE '%%\%%20%%'")
+    results = res.fetchall()
+    for user in results:
+        old_openid = user[5]
+        new_openid = user[5].replace('%20', '.')
+
+        # Remove instances of the new openid so the old one can take
+        # its place.
+        query = "delete from user where openid='%s'" % (new_openid)
+        conn.execute(query.replace('%', '%%'))
+
+        # Update the openid.
+        query = ("update user set openid='%s' where openid='%s'" %
+                 (new_openid, old_openid))
+        conn.execute(query.replace('%', '%%'))
+
+    # Update all usage of %20 in all openid references using MySQL Replace.
+    conn.execute("update meta set value = "
+                 "REPLACE (value, '%%20', '.')")
+    conn.execute("update pubkeys set openid = "
+                 "REPLACE (openid, '%%20', '.')")
+    conn.execute("update organization set created_by_user = "
+                 "REPLACE (created_by_user, '%%20', '.')")
+    conn.execute("update product set created_by_user = "
+                 "REPLACE (created_by_user, '%%20', '.')")
+    conn.execute("update product_version set created_by_user = "
+                 "REPLACE (created_by_user, '%%20', '.')")
+    conn.execute("update user_to_group set created_by_user = "
+                 "REPLACE (created_by_user, '%%20', '.')")
+    conn.execute("update user_to_group set user_openid = "
+                 "REPLACE (user_openid, '%%20', '.')")
+
+    conn.execute("SET FOREIGN_KEY_CHECKS=1")
+
+
+def downgrade():
+    """Downgrade DB."""
+    pass