WIP: composite primary keys

src/executor/insert.rs

@@ -92,7 +92,9 @@ where
         }
         _ => {
             let last_insert_id = db.execute(statement).await?.last_insert_id();
-            ValueTypeOf::<A>::try_from_u64(last_insert_id)?
+            ValueTypeOf::<A>::try_from_u64(last_insert_id)
+                .ok()
+                .unwrap_or_default()
         }
     };
     Ok(InsertResult { last_insert_id })

src/executor/query.rs

@@ -410,32 +410,6 @@ pub trait TryFromU64: Sized {
     fn try_from_u64(n: u64) -> Result<Self, DbErr>;
 }
 
-macro_rules! try_from_u64 {
-    ( $type: ty ) => {
-        impl TryFromU64 for $type {
-            fn try_from_u64(n: u64) -> Result<Self, DbErr> {
-                use std::convert::TryInto;
-                n.try_into().map_err(|_| {
-                    DbErr::Exec(format!(
-                        "fail to convert '{}' into '{}'",
-                        n,
-                        stringify!($type)
-                    ))
-                })
-            }
-        }
-    };
-}
-
-try_from_u64!(i8);
-try_from_u64!(i16);
-try_from_u64!(i32);
-try_from_u64!(i64);
-try_from_u64!(u8);
-try_from_u64!(u16);
-try_from_u64!(u32);
-try_from_u64!(u64);
-
 macro_rules! try_from_u64_err {
     ( $type: ty ) => {
         impl TryFromU64 for $type {
@@ -449,5 +423,60 @@ macro_rules! try_from_u64_err {
     };
 }
 
+macro_rules! try_from_u64_tuple {
+    ( $type: ty ) => {
+        try_from_u64_err!(($type, $type));
+        try_from_u64_err!(($type, $type, $type));
+    };
+}
+
+macro_rules! try_from_u64_numeric {
+    ( $type: ty ) => {
+        impl TryFromU64 for $type {
+            fn try_from_u64(n: u64) -> Result<Self, DbErr> {
+                use std::convert::TryInto;
+                n.try_into().map_err(|_| {
+                    DbErr::Exec(format!(
+                        "fail to convert '{}' into '{}'",
+                        n,
+                        stringify!($type)
+                    ))
+                })
+            }
+        }
+        try_from_u64_tuple!($type);
+    };
+}
+
+try_from_u64_numeric!(i8);
+try_from_u64_numeric!(i16);
+try_from_u64_numeric!(i32);
+try_from_u64_numeric!(i64);
+try_from_u64_numeric!(u8);
+try_from_u64_numeric!(u16);
+try_from_u64_numeric!(u32);
+try_from_u64_numeric!(u64);
+
+macro_rules! try_from_u64_string {
+    ( $type: ty ) => {
+        impl TryFromU64 for $type {
+            fn try_from_u64(n: u64) -> Result<Self, DbErr> {
+                Ok(n.to_string())
+            }
+        }
+        try_from_u64_tuple!($type);
+    };
+}
+
+try_from_u64_string!(String);
+
+macro_rules! try_from_u64_dummy {
+    ( $type: ty ) => {
+        try_from_u64_err!($type);
+        try_from_u64_err!(($type, $type));
+        try_from_u64_err!(($type, $type, $type));
+    };
+}
+
 #[cfg(feature = "with-uuid")]
-try_from_u64_err!(uuid::Uuid);
+try_from_u64_dummy!(uuid::Uuid);

tests/primary_key_tests.rs

@@ -26,16 +26,14 @@ async fn create_metadata(db: &DatabaseConnection) -> Result<(), DbErr> {
         value: Set("1.18".to_owned()),
     };
 
-    let res = Metadata::insert(metadata.clone()).exec(db).await;
+    let res = Metadata::insert(metadata.clone()).exec(db).await?;
 
-    if cfg!(feature = "sqlx-postgres") {
+    let expected_uuid = if cfg!(feature = "sqlx-postgres") {
-        assert_eq!(metadata.uuid.unwrap(), res?.last_insert_id);
+        metadata.uuid.unwrap()
     } else {
-        assert_eq!(
+        Uuid::default()
-            res.unwrap_err(),
+    };
-            DbErr::Exec("uuid::Uuid cannot be converted from u64".to_owned())
+    assert_eq!(res.last_insert_id, expected_uuid);
-        );
-    }
 
     Ok(())
 }