Re-enable substring lookups for IP address fields in Postgres using HOST() Thanks for the suggestion, Thomas Adamcik. Fixes #708.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7161 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/postgresql/operations.py

@@ -27,6 +27,11 @@ class DatabaseOperations(BaseDatabaseOperations):
     def deferrable_sql(self):
         return " DEFERRABLE INITIALLY DEFERRED"
 
+    def field_cast_sql(self, db_type):
+        if db_type == 'inet':
+            return 'HOST(%s)'
+        return '%s'
+
     def last_insert_id(self, cursor, table_name, pk_name):
         cursor.execute("SELECT CURRVAL('\"%s_%s_seq\"')" % (table_name, pk_name))
         return cursor.fetchone()[0]

tests/regressiontests/string_lookup/models.py

@@ -39,6 +39,7 @@ class Base(models.Model):
 class Article(models.Model):
     name = models.CharField(max_length=50)
     text = models.TextField()
+    submitted_from = models.IPAddressField(blank=True, null=True)
 
     def __str__(self):
         return "Article %s" % self.name
@@ -98,4 +99,11 @@ __test__ = {'API_TESTS': ur"""
 
 >>> Article.objects.get(text__contains='quick brown fox')
 <Article: Article Test>
+
+# Regression test for #708: "like" queries on IP address fields require casting
+# to text (on PostgreSQL).
+>>> Article(name='IP test', text='The body', submitted_from='192.0.2.100').save()
+>>> Article.objects.filter(submitted_from__contains='192.0.2')
+[<Article: Article IP test>]
+
 """}