ByChanderZap

// We need somewhere to store the prepared statement for the lifetime of our
 // web application. A neat way is to embed it in the model alongside the 
// connection pool.
 type ExampleModel struct {
    DB         *sql.DB
    InsertStmt *sql.Stmt
 }

 // Create a constructor for the model, in which we set up the prepared
 // statement.

ByChanderZap

// Types for the result object with discriminated union
type Success<T> = {
  data: T;
  error: null;
};

type Failure<E> = {
  data: null;
  error: E;
};