From 35b8bc2443fd0a6e67d44d912ff869692d95e11d Mon Sep 17 00:00:00 2001
From: Matt Westcott <matt@west.co.tt>
Date: Wed, 12 Nov 2014 16:22:08 +0000
Subject: [PATCH] Change 'Field hasn't specified on_delete action' to a warning
 rather than an error, as per #792

---
 wagtail/wagtailcore/models.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/wagtail/wagtailcore/models.py b/wagtail/wagtailcore/models.py
index 4d27f6e536..47b9305c46 100644
--- a/wagtail/wagtailcore/models.py
+++ b/wagtail/wagtailcore/models.py
@@ -385,11 +385,11 @@ class Page(six.with_metaclass(PageBase, MP_Node, ClusterableModel, index.Indexed
             if isinstance(field, models.ForeignKey) and field.name not in field_exceptions:
                 if field.rel.on_delete == models.CASCADE:
                     errors.append(
-                        checks.Error(
+                        checks.Warning(
                             "Field hasn't specified on_delete action",
                             hint="Set on_delete=models.SET_NULL and make sure the field is nullable.",
                             obj=field,
-                            id='wagtailcore.E001',
+                            id='wagtailcore.W001',
                         )
                     )