Fixed #20007 -- Configured psycopg2 to return UnicodeArrays

Thanks hogbait for the report.

AUTHORS

@@ -120,6 +120,7 @@ answer newbie questions, and generally made Django that much better:
     Craig Blaszczyk <masterjakul@gmail.com>
     David Blewett <david@dawninglight.net>
     Artem Gnilov <boobsd@gmail.com>
+    Eric Boersma <eric.boersma@gmail.com>
     Matías Bordese
     Nate Bragg <jonathan.bragg@alum.rpi.edu>
     Sean Brant

django/db/backends/postgresql_psycopg2/base.py

@@ -31,6 +31,7 @@ DatabaseError = Database.DatabaseError
 IntegrityError = Database.IntegrityError
 
 psycopg2.extensions.register_type(psycopg2.extensions.UNICODE)
+psycopg2.extensions.register_type(psycopg2.extensions.UNICODEARRAY)
 psycopg2.extensions.register_adapter(SafeBytes, psycopg2.extensions.QuotedString)
 psycopg2.extensions.register_adapter(SafeText, psycopg2.extensions.QuotedString)
 

tests/backends/tests.py

@@ -963,3 +963,23 @@ class BackendUtilTests(TestCase):
               '0.1')
         equal('0.1234567890', 12, 0,
               '0')
+
+@unittest.skipUnless(
+    connection.vendor == 'postgresql',
+    "This test applies only to PostgreSQL")
+class UnicodeArrayTestCase(TestCase):
+
+    def select(self, val):
+        cursor = connection.cursor()
+        cursor.execute("select %s", (val,))
+        return cursor.fetchone()[0]
+
+    def test_select_ascii_array(self):
+        a = ["awef"]
+        b = self.select(a)
+        self.assertEqual(a[0], b[0])
+
+    def test_select_unicode_array(self):
+        a = [u"ᄲawef"]
+        b = self.select(a)
+        self.assertEqual(a[0], b[0])