pub async fn update_by_id_and_course_id(
conn: &mut PgConnection,
material_reference_id: Uuid,
course_id: Uuid,
material_reference: NewMaterialReference,
) -> ModelResult<MaterialReference>pub async fn update_by_id_and_course_id(
conn: &mut PgConnection,
material_reference_id: Uuid,
course_id: Uuid,
material_reference: NewMaterialReference,
) -> ModelResult<MaterialReference>