Fixed interaction between RealDictCursor and named cursors

Closes ticket #67.

NEWS

@@ -8,6 +8,8 @@ What's new in psycopg 2.4.3
   - Lazy import of the slow uuid module, thanks to Marko Kreen.
   - Fixed NamedTupleCursor.executemany() (ticket #65).
   - Fixed --static-libpq setup option (ticket #64).
+  - Fixed interaction between RealDictCursor and named cursors
+    (ticket #67).
   - 'errorcodes' map updated to PostgreSQL 9.1.
 
 

lib/extras.py

@@ -237,6 +237,10 @@ class RealDictRow(dict):
 
     def __init__(self, cursor):
         dict.__init__(self)
+        # Required for named cursors
+        if cursor.description and not cursor.column_mapping:
+            cursor._build_index()
+
         self._column_mapping = cursor.column_mapping
 
     def __setitem__(self, name, value):

tests/extras_dictcursor.py

@@ -80,6 +80,21 @@ class ExtrasDictCursorTests(unittest.TestCase):
                 return row
         self._testWithNamedCursor(getter)
 
+    def testDictCursorRealWithNamedCursorFetchOne(self):
+        self._testWithNamedCursorReal(lambda curs: curs.fetchone())
+
+    def testDictCursorRealWithNamedCursorFetchMany(self):
+        self._testWithNamedCursorReal(lambda curs: curs.fetchmany(100)[0])
+
+    def testDictCursorRealWithNamedCursorFetchAll(self):
+        self._testWithNamedCursorReal(lambda curs: curs.fetchall()[0])
+
+    def testDictCursorRealWithNamedCursorIter(self):
+        def getter(curs):
+            for row in curs:
+                return row
+        self._testWithNamedCursorReal(getter)
+
     def _testWithPlainCursor(self, getter):
         curs = self.conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
         curs.execute("SELECT * FROM ExtrasDictCursorTests")