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Diffstat (limited to 'django/db/models/sql/compiler.py')
| -rw-r--r-- | django/db/models/sql/compiler.py | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/django/db/models/sql/compiler.py b/django/db/models/sql/compiler.py index 97288c83d7..d1009847e7 100644 --- a/django/db/models/sql/compiler.py +++ b/django/db/models/sql/compiler.py @@ -266,8 +266,12 @@ class SQLCompiler: try: sql, params = self.compile(col) except EmptyResultSet: - # Select a predicate that's always False. - sql, params = '0', () + empty_result_set_value = getattr(col, 'empty_result_set_value', NotImplemented) + if empty_result_set_value is NotImplemented: + # Select a predicate that's always False. + sql, params = '0', () + else: + sql, params = self.compile(Value(empty_result_set_value)) else: sql, params = col.select_format(self, sql, params) ret.append((col, (sql, params), alias)) |