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Add parameter fallback to select_one_value.

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voussoir 2022-06-03 19:42:20 -07:00
parent 2c8081505a
commit aeb6b89f58
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1 changed files with 5 additions and 4 deletions
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9
voussoirkit/worms.py
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@ -426,17 +426,18 @@ class Database(metaclass=abc.ABCMeta):
cur = self.execute(query, bindings)
return cur.fetchone()
def select_one_value(self, query, bindings=None):
def select_one_value(self, query, bindings=None, fallback=None):
'''
Select a single column out of a single row, or None if no rows match
your query.
Select a single column out of a single row, or fallback if no rows match
your query. The fallback can help you distinguish between rows that
don't exist and a null value.
'''
cur = self.execute(query, bindings)
row = cur.fetchone()
if row:
return row[0]
else:
return None
return fallback
def update(self, table, pairs, where_key) -> sqlite3.Cursor:
if isinstance(table, type) and issubclass(table, Object):