Trait diesel::connection::BoxableConnection
source · pub trait BoxableConnection<DB: Backend>: SimpleConnection + Any { }Expand description
A variant of the Connection trait that is
usable with dynamic dispatch
If you are looking for a way to use pass database connections
for different database backends around in your application
this trait won’t help you much. Normally you should only
need to use this trait if you are interacting with a connection
passed to a Migration
Implementations§
source§impl<DB: Backend + 'static> dyn BoxableConnection<DB>
impl<DB: Backend + 'static> dyn BoxableConnection<DB>
sourcepub fn downcast_ref<T>(&self) -> Option<&T>where
T: Connection<Backend = DB> + 'static,
pub fn downcast_ref<T>(&self) -> Option<&T>where T: Connection<Backend = DB> + 'static,
Downcast the current connection to a specific connection type.
This will return None if the underlying
connection does not match the corresponding
type, otherwise a reference to the underlying connection is returned
sourcepub fn downcast_mut<T>(&mut self) -> Option<&mut T>where
T: Connection<Backend = DB> + 'static,
pub fn downcast_mut<T>(&mut self) -> Option<&mut T>where T: Connection<Backend = DB> + 'static,
Downcast the current connection to a specific mutable connection type.
This will return None if the underlying
connection does not match the corresponding
type, otherwise a mutable reference to the underlying connection is returned
sourcepub fn is<T>(&self) -> boolwhere
T: Connection<Backend = DB> + 'static,
pub fn is<T>(&self) -> boolwhere T: Connection<Backend = DB> + 'static,
Check if the current connection is a specific connection type