[soc2010/query-refactor] Implemented deletion. Thanks to Josh Ourisman for pointing this out.

git-svn-id: http://code.djangoproject.com/svn/django/branches/soc2010/query-refactor@13433 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/mongodb/compiler.py

@@ -176,3 +176,9 @@ class SQLUpdateCompiler(SQLCompiler):
             vals,
             multi=True
         )
+
+
+class SQLDeleteCompiler(SQLCompiler):
+    def delete(self, result_type):
+        filters = self.get_filters(self.query.where)
+        self.connection.db[self.query.model._meta.db_table].remove(filters)

django/db/models/sql/compiler.py

@@ -821,6 +821,9 @@ class SQLDeleteCompiler(SQLCompiler):
         where, params = self.query.where.as_sql(qn=qn, connection=self.connection)
         result.append('WHERE %s' % where)
         return ' '.join(result), tuple(params)
+    
+    def delete(self, *args, **kwargs):
+        return self.execute_sql(*args, **kwargs)
 
 class SQLUpdateCompiler(SQLCompiler):
     def as_sql(self):

django/db/models/sql/subqueries.py

@@ -24,7 +24,7 @@ class DeleteQuery(Query):
     def do_query(self, table, where, using):
         self.tables = [table]
         self.where = where
-        self.get_compiler(using).execute_sql(None)
+        self.get_compiler(using).delete(None)
 
     def delete_batch(self, pk_list, using):
         """
@@ -36,7 +36,7 @@ class DeleteQuery(Query):
         for offset in range(0, len(pk_list), GET_ITERATOR_CHUNK_SIZE):
             where = self.where_class()
             field = self.model._meta.pk
-            where.add((Constraint(None, field.column, field), 'in',
+            where.add((Constraint(self.model._meta.db_table, field.column, field), 'in',
                     pk_list[offset : offset + GET_ITERATOR_CHUNK_SIZE]), AND)
             self.do_query(self.model._meta.db_table, where, using=using)
 

tests/regressiontests/mongodb/tests.py

@@ -50,6 +50,22 @@ class MongoTestCase(TestCase):
         Artist.objects.filter(pk=k.pk).update(age=1 + F("age"))
         self.assertEqual(Artist.objects.get(pk=k.pk).age, 58)
     
+    def test_delete(self):
+        o = Artist.objects.create(name="O.A.R.", good=True)
+        self.assertEqual(Artist.objects.count(), 1)
+        
+        o.delete()
+        self.assertEqual(Artist.objects.count(), 0)
+    
+    def test_bulk_delete(self):
+        d = Artist.objects.create(name="Dispatch", good=True)
+        b = Artist.objects.create(name="Backstreet Boys", good=False)
+        
+        # Good riddance.
+        Artist.objects.filter(good=False).delete()
+        self.assertEqual(Artist.objects.count(), 1)
+        self.assertEqual(Artist.objects.get(), d)
+    
     def test_count(self):
         Artist.objects.create(name="Billy Joel", good=True)
         Artist.objects.create(name="John Mellencamp", good=True)