Toward Go 2 - Hackdot

Re:Toward Go 2 by weberc2 on Thursday July 13, 2017 @04:23PM (#14764835)

I guess I don't see how generics would help you reduce the number of insert/update functions. The basic problem of an ORM is to map struct fields to columns; I don't see how generics would help you here. Can you write the generic pseudocode you want to write?

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Re:Toward Go 2 by rmrfrmrf on Thursday July 13, 2017 @11:17PM (#14767166)

I would guess something like:

    class Collection<T implements Entity> {
        void insert(T entity) {
            String vals = entity.props.map(escapeSql).join(",");
            String qs = entity.props.map(x => "?").join(",");
            PreparedStatement p = db.prepare("insert into %s (%s) values (%s);", this.tableName, qs, vals);
            db.submit(p);
        }
    }

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Re:Toward Go 2 by weberc2 on Friday July 14, 2017 @09:00AM (#14769427)

Go supports that today. Slice is a generic collection. Map will need to become for loops, but that's minor.

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