[REF] addons: avoid using NewId

addons/http_routing/models/ir_http.py

@@ -85,7 +85,7 @@ def slugify(s, max_length=None, path=False):
 
 def slug(value):
     if isinstance(value, models.BaseModel):
-        if isinstance(value.id, models.NewId):
+        if not value.id:
             raise ValueError("Cannot slug non-existent record %s" % value)
         # [(id, name)] = value.name_get()
         identifier, name = value.id, value.display_name

addons/website_event_track/models/event_track.py

@@ -95,7 +95,7 @@ class Track(models.Model):
     def _compute_website_url(self):
         super(Track, self)._compute_website_url()
         for track in self:
-            if not isinstance(track.id, models.NewId):
+            if track.id:
                 track.website_url = '/event/%s/track/%s' % (slug(track.event_id), slug(track))
 
     @api.onchange('partner_id')