Hands-On Dependency Injection in Go

Applying method injection to the data package

A quick reminder, the data package is a data access layer (DAL) that provides simplified and abstracted access to the underlying MySQL database.

The following is the current code for the Save() function:

// Save will save the supplied person and return the ID of the newly // created person or an error.// Errors returned are caused by the underlying database or our // connection to it.func Save(in *Person) (int, error) {   db, err := getDB()   if err != nil {      logging.L.Error("failed to get DB connection. err: %s", err)      return defaultPersonID, err   }   // perform DB insert   result, err := db.Exec(sqlInsert, in.FullName, in.Phone, in.Currency, in.Price)   if err != nil {      logging.L.Error("failed to save person ...