I've structured my application in two packages so far - main
and app
In my main()
I start my server:
func main() {
router := app.CreateRouter(app.Routes())
log.Fatal(http.ListenAndServe(":8080", router))
}
In app, I have a Config
struct which has a method connectToDB
:
type Config struct {
DB *sql.DB
}
func (c *Config) connectToDB() {
connectionString := fmt.Sprintf("user=%s password=%s dbname=%s sslmode=disable", os.Getenv("DB_USERNAME"), os.Getenv("DB_PASSWORD"), os.Getenv("DB_NAME"))
var err error
c.DB, err = sql.Open("postgres", connectionString)
if err != nil {
log.Fatal(err)
}
}
func init() {
c := Config{}
c.connectToDB()
}
However, I have various handlers and if I want to make use of Config.DB
, how can I do that?
For example, in app.UserIndex, how can I get to Config.DB
?
func UserIndex(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
fmt.Fprint(w, "test!
")
}
Now, one thing I can do is set a global variable, such as
var c Config
Then, I can access c.DB anywhere in package app
. However, this feels bad..