Using a subquery in 'FROM' in gorm

Question

I would like to know how I can use a subquery in FROM clause using gorm. It would look like the following:

SELECT * FROM 
(
  SELECT foo.*
  FROM foo
  WHERE bar         


        

Answer 1

Solved this issue by creating a package for more flexibility: https://github.com/loeffel-io/sql

subquery := sql.Create().
    Select(true, "purchases.*").
    Select(true, "...").
    From(true, "purchases").
    Join(true, "transactions ON transactions.purchase_id=purchases.id")

query := sql.Create().Select(true, "*").
    From(true, "(?) purchases", gorm.Expr(subquery.GetSQL(), subquery.GetValues()...)).
    Join(true, "transactions ON transactions.id=purchases.last_transaction_id")

db.
    Raw(query.GetSQL(), query.GetValues()...).
    Offset(...).
    Limit(...).
    Order(...).
    Unscoped().
    Find(&purchases).
    Error