查询两个表并从响应中选择一个字段

I am using the following code to query a row from two joined tables:

s.database.GetDatabase().Model(&dbUser).Related(&result, "Registrations")

However when i use select as follows:

s.database.GetDatabase().Model(&dbUser).Select("name").Related(&result, "Registrations")

it show the following error and returns zero records

(pq: zero-length delimited identifier at or near """")