Add index to hostname

Author: miedzinski

src/ralph/assets/models/assets.py

@@ -368,6 +368,7 @@ class Asset(AdminAbsoluteUrlMixin, PriceMixin, BaseObject):
         max_length=255,
         null=True,
         verbose_name=_('hostname'),  # TODO: unique
+        db_index=True,
     )
     sn = NullableCharField(
         blank=True,

src/ralph/virtual/models.py

@@ -214,7 +214,8 @@ def save(self, *args, **kwargs):
     )
     hostname = models.CharField(
         verbose_name=_('hostname'),
-        max_length=255
+        max_length=255,
+        db_index=True,
     )
     hypervisor = models.ForeignKey(DataCenterAsset, blank=True, null=True)
     image_name = models.CharField(max_length=255, null=True, blank=True)