Fixes #2271 -- Added code to imply !__exact on any query argument tha…

…t doesn't finish with a known query term.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@3248 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/query.py

@@ -10,8 +10,20 @@
 if not hasattr(__builtins__, 'set'):
     from sets import Set as set
 
+# The string constant used to separate query parts
 LOOKUP_SEPARATOR = '__'
 
+# The list of valid query types 
+QUERY_TERMS=(
+    'exact', 'iexact',
+    'contains', 'icontains',
+    'gt', 'gte', 'lt', 'lte',
+    'in',
+    'startswith', 'istartswith', 'endswith', 'iendswith',
+    'range', 'year', 'month', 'day',
+    'isnull'
+)
+
 # Size of each "chunk" for get_iterator calls.
 # Larger values are slightly faster at the expense of more storage space.
 GET_ITERATOR_CHUNK_SIZE = 100
@@ -710,12 +722,13 @@ def parse_lookup(kwarg_items, opts):
             #     if we find "pk", make the clause "exact', and insert
             #     a dummy name of None, which we will replace when
             #     we know which table column to grab as the primary key.
-            # 2)  If there is only one part, assume it to be an __exact
+            # 2)  If there is only one part, or the last part is not a query
+            #     term, assume that the query is an __exact            
             clause = path.pop()
             if clause == 'pk':
                 clause = 'exact'
                 path.append(None)
-            elif len(path) == 0:
+            elif len(path) == 0 or clause not in QUERY_TERMS:
                 path.append(clause)
                 clause = 'exact'
 

tests/modeltests/many_to_one/models.py

@@ -136,6 +136,10 @@ class Meta:
 >>> Article.objects.filter(reporter__first_name__exact='John')
 [<Article: John's second story>, <Article: This is a test>]
 
+# Check that implied __exact also works
+>>> Article.objects.filter(reporter__first_name='John')
+[<Article: John's second story>, <Article: This is a test>]
+
 # Query twice over the related field.
 >>> Article.objects.filter(reporter__first_name__exact='John', reporter__last_name__exact='Smith')
 [<Article: John's second story>, <Article: This is a test>]
@@ -237,6 +241,10 @@ class Meta:
 >>> Reporter.objects.filter(article__reporter__exact=r).distinct()
 [<Reporter: John Smith>]
 
+# Check that implied __exact also works
+>>> Reporter.objects.filter(article__reporter=r).distinct()
+[<Reporter: John Smith>]
+
 # If you delete a reporter, his articles will be deleted.
 >>> Article.objects.all()
 [<Article: John's second story>, <Article: Paul's story>, <Article: This is a test>, <Article: This is a test>, <Article: This is a test>]