pub async fn get_or_insert_by_unique_index(
conn: &mut PgConnection,
user_exercise_state_id: Uuid,
exercise_slide_id: Uuid
) -> ModelResult<UserExerciseSlideState>
pub async fn get_or_insert_by_unique_index(
conn: &mut PgConnection,
user_exercise_state_id: Uuid,
exercise_slide_id: Uuid
) -> ModelResult<UserExerciseSlideState>