To avoid an unfortunately common user-error, rename QuerySet.as_sql().

This was never a public API method, so this is backwards compatible, unless
you're poking at the internals. Refs #10352.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9928 bcc190cf-cafb-0310-a4f2-bffc1f526a37

2 files changed, 10 insertions, 4 deletions

diff --git a/django/db/models/fields/__init__.py b/django/db/models/fields/__init__.py
index 41e8c06b80..b7438e02b2 100644
--- a/django/db/models/fields/__init__.py
+++ b/django/db/models/fields/__init__.py
@@ -193,12 +193,15 @@ class Field(object):
 
     def get_db_prep_lookup(self, lookup_type, value):
         "Returns field's value prepared for database lookup."
-        if hasattr(value, 'as_sql'):
+        if hasattr(value, 'as_sql') or hasattr(value, '_as_sql'):
             # If the value has a relabel_aliases method, it will need to
             # be invoked before the final SQL is evaluated
             if hasattr(value, 'relabel_aliases'):
                 return value
-            sql, params = value.as_sql()
+            try:
+                sql, params = value.as_sql()
+            except AttributeError:
+                sql, params = value._as_sql()
             return QueryWrapper(('(%s)' % sql), params)
 
         if lookup_type in ('regex', 'iregex', 'month', 'day', 'week_day', 'search'):
diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py
index b763b05647..8f874bc7e0 100644
--- a/django/db/models/fields/related.py
+++ b/django/db/models/fields/related.py
@@ -140,12 +140,15 @@ class RelatedField(object):
                     v = v[0]
             return v
 
-        if hasattr(value, 'as_sql'):
+        if hasattr(value, 'as_sql') or hasattr(value, '_as_sql'):
             # If the value has a relabel_aliases method, it will need to
             # be invoked before the final SQL is evaluated
             if hasattr(value, 'relabel_aliases'):
                 return value
-            sql, params = value.as_sql()
+            try:
+                sql, params = value.as_sql()
+            except AttributeError:
+                sql, params = value._as_sql()
             return QueryWrapper(('(%s)' % sql), params)
 
         # FIXME: lt and gt are explicitally allowed to make