diff options
Diffstat (limited to 'lib/sqlalchemy/schema.py')
| -rw-r--r-- | lib/sqlalchemy/schema.py | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/lib/sqlalchemy/schema.py b/lib/sqlalchemy/schema.py index e40b6f592..f2737ecde 100644 --- a/lib/sqlalchemy/schema.py +++ b/lib/sqlalchemy/schema.py @@ -250,7 +250,12 @@ class Table(SchemaItem, expression.TableClause): if autoload_with: autoload_with.reflecttable(self, include_columns=include_columns) else: - _bind_or_error(metadata).reflecttable(self, include_columns=include_columns) + _bind_or_error(metadata, msg="No engine is bound to this Table's MetaData. " + "Pass an engine to the Table via " + "autoload_with=<someengine>, " + "or associate the MetaData with an engine via " + "metadata.bind=<someengine>").\ + reflecttable(self, include_columns=include_columns) # initialize all the column, etc. objects. done after reflection to # allow user-overrides @@ -2340,7 +2345,7 @@ class DropConstraint(_CreateDropBase): super(DropConstraint, self).__init__(element, **kw) element._create_rule = lambda compiler: False -def _bind_or_error(schemaitem): +def _bind_or_error(schemaitem, msg=None): bind = schemaitem.bind if not bind: name = schemaitem.__class__.__name__ @@ -2354,11 +2359,12 @@ def _bind_or_error(schemaitem): bindable = "the %s's .bind" % name else: bindable = "this %s's .metadata.bind" % name - - msg = ('The %s is not bound to an Engine or Connection. ' - 'Execution can not proceed without a database to execute ' - 'against. Either execute with an explicit connection or ' - 'assign %s to enable implicit execution.') % (item, bindable) + + if msg is None: + msg = ('The %s is not bound to an Engine or Connection. ' + 'Execution can not proceed without a database to execute ' + 'against. Either execute with an explicit connection or ' + 'assign %s to enable implicit execution.') % (item, bindable) raise exc.UnboundExecutionError(msg) return bind |