diff options
Diffstat (limited to 'lib/sqlalchemy/sql/util.py')
| -rw-r--r-- | lib/sqlalchemy/sql/util.py | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/lib/sqlalchemy/sql/util.py b/lib/sqlalchemy/sql/util.py index 9be405e21..02165aad5 100644 --- a/lib/sqlalchemy/sql/util.py +++ b/lib/sqlalchemy/sql/util.py @@ -103,7 +103,7 @@ def join_condition(a, b, ignore_nonexistent_tables=False): else: raise - if col: + if col is not None: crit.append(col == fk.parent) constraints.add(fk.constraint) if a is not b: @@ -116,7 +116,7 @@ def join_condition(a, b, ignore_nonexistent_tables=False): else: raise - if col: + if col is not None: crit.append(col == fk.parent) constraints.add(fk.constraint) @@ -267,9 +267,9 @@ def splice_joins(left, right, stop_on=None): stack.append((right.left, right)) else: right = adapter.traverse(right) - if prevright: + if prevright is not None: prevright.left = right - if not ret: + if ret is None: ret = right return ret @@ -467,10 +467,10 @@ class ClauseAdapter(visitors.ReplacingCloningVisitor): def _corresponding_column(self, col, require_embedded, _seen=util.EMPTY_SET): newcol = self.selectable.corresponding_column(col, require_embedded=require_embedded) - if not newcol and col in self.equivalents and col not in _seen: + if newcol is None and col in self.equivalents and col not in _seen: for equiv in self.equivalents[col]: newcol = self._corresponding_column(equiv, require_embedded=require_embedded, _seen=_seen.union([col])) - if newcol: + if newcol is not None: return newcol return newcol @@ -525,7 +525,7 @@ class ColumnAdapter(ClauseAdapter): def _locate_col(self, col): c = self._corresponding_column(col, False) - if not c: + if c is None: c = self.adapt_clause(col) # anonymize labels in case they have a hardcoded name |