Update to array records with new v3 `setColumn` query

I’m looking to add a new value to a column value of uuid[] and I’m running into scoping issues. I’m not able to get the current values of that column when trying to add a new value to it. This stems from the add to LINQ style column update from #40. I’d be happy to update the documentation like discussed in #50 and this use case as well when this is figured out. I wasn’t really able to find any complex updates from other user searching the internet with the new syntax.

CREATE TABLE Users (
    id uuid NOT NULL PRIMARY KEY,
    items uuid[] NOT NULL DEFUALT ARRAY[]::uuid[] )

type User = 
    { Id: Guid
      Items: Guid list }

let userTable = table<User>

let addItem (conn: IDbConnection) (userId: Guid) (itemId: Guid) =
    update {
        for u in userTable do
            setColumn u.Items (List.Cons(itemId, u.Items)
            where (id = userId)
    }

error FS0039: The value or constructor 'u' is not defined

The equivalent SQL command I’m trying to emulate is

UPDATE users
SET items = array_append(items, @item)
WHERE id = @id

[JordanMarr]

I think it might be as easy as this:

open Dapper

let addItem (conn: IDbConnection) (user: User) (item: Guid) =
    conn.Execute(
        """
        UPDATE users
        SET items = array_append(@items, @item)
        WHERE id = @id")
        """, {| items = user.Items; item = item; id = user.Id |})

open Dapper is key here because Dapper adds its own extension methods (like Execute) on top of the connection.

[Evelios]

I haven’t done it with the old version. I just started to pick up this library recently using v3. If this wasn’t a feature that was supported before then I guess this isn’t actually an issue but a new use case