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Diffstat (limited to 'lib/sqlalchemy/engine/base.py')
| -rw-r--r-- | lib/sqlalchemy/engine/base.py | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/sqlalchemy/engine/base.py b/lib/sqlalchemy/engine/base.py index 4bae94317..aa9358cd6 100644 --- a/lib/sqlalchemy/engine/base.py +++ b/lib/sqlalchemy/engine/base.py @@ -2189,6 +2189,8 @@ class Engine(Connectable, log.Identified): class OptionEngine(Engine): + _sa_propagate_class_events = False + def __init__(self, proxied, execution_options): self._proxied = proxied self.url = proxied.url @@ -2196,7 +2198,21 @@ class OptionEngine(Engine): self.logging_name = proxied.logging_name self.echo = proxied.echo log.instance_logger(self, echoflag=self.echo) + + # note: this will propagate events that are assigned to the parent + # engine after this OptionEngine is created. Since we share + # the events of the parent we also disallow class-level events + # to apply to the OptionEngine class directly. + # + # the other way this can work would be to transfer existing + # events only, using: + # self.dispatch._update(proxied.dispatch) + # + # that might be more appropriate however it would be a behavioral + # change for logic that assigns events to the parent engine and + # would like it to take effect for the already-created sub-engine. self.dispatch = self.dispatch._join(proxied.dispatch) + self._execution_options = proxied._execution_options self.update_execution_options(**execution_options) |