From: Kai Mueller <15907922+kasium@users.noreply.github.com>
Date: Thu, 24 Jun 2021 13:08:50 +0000 (+0000)
Subject: Fix missing None handling of Table.prefixes
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0638723e43f156889fc4ae19dbf96f586ca2ae53;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

Fix missing None handling of Table.prefixes
---

diff --git a/lib/sqlalchemy/sql/schema.py b/lib/sqlalchemy/sql/schema.py
index 221d49db9a..f80d4989c2 100644
--- a/lib/sqlalchemy/sql/schema.py
+++ b/lib/sqlalchemy/sql/schema.py
@@ -659,7 +659,7 @@ class Table(DialectKWArgs, SchemaItem, TableClause):
             for evt, fn in listeners:
                 event.listen(self, evt, fn)
 
-        self._prefixes = kwargs.pop("prefixes", [])
+        self._prefixes = kwargs.pop("prefixes", []) or []
 
         self._extra_kwargs(**kwargs)
 
diff --git a/test/sql/test_metadata.py b/test/sql/test_metadata.py
index 9e02530525..4efcf607d1 100644
--- a/test/sql/test_metadata.py
+++ b/test/sql/test_metadata.py
@@ -5540,3 +5540,7 @@ class CopyDialectOptionsTest(fixtures.TestBase):
             m2 = MetaData()
             t2 = t1.to_metadata(m2)  # make a copy
             self.check_dialect_options_(t2)
+
+    def test_prefixes_set_to_none(self):
+        table = Table("foo", Column("bar", Integer), prefixes=None)
+        assert table._prefixes == []