start impling diesel::Queryable for Models

1 files changed, 7 insertions, 1 deletions

diff --git a/src/db/backend.rs b/src/db/backend.rs
index 5f35dd9..5950747 100644
--- a/src/db/backend.rs
+++ b/src/db/backend.rs
@@ -1,8 +1,14 @@
 use barrel::backend::SqlGenerator;
 pub use diesel::connection::Connection;
 
+pub trait UsableBackend: diesel::backend::Backend where *const str: diesel::deserialize::FromSql<diesel::sql_types::Text, Self> {}
+impl UsableBackend for diesel::sqlite::Sqlite {}
+
+pub trait UsableConnection: Connection where <Self as Connection>::Backend: UsableBackend {}
+impl UsableConnection for diesel::sqlite::SqliteConnection {}
+
 pub trait Connectable {
-    type Connection: Connection;
+    type Connection: UsableConnection;
     type SqlGenerator: SqlGenerator;
     fn connect(&self) -> diesel::ConnectionResult<Self::Connection>;
 }