How to connect PostgreSQL database using Gorm - postgresql

Question

I am unable to connect to PostgreSQL.
var db *gorm.DB
var err error
func main() {
router := mux.NewRouter()
var err error
db, err = gorm.Open("postgres", "host=localhost port=5432 user=postgres dbname=dvdrental password=12345")
if err != nil {
panic("failed to connect database")
}
I am expecting database to be connected and fetching api.

Answer 1

This is the best way I found to connect to postgres.
import _ "github.com/jinzhu/gorm/dialects/postgres"
dsn := url.URL{
User: url.UserPassword(conf.User, conf.Password),
Scheme: "postgres",
Host: fmt.Sprintf("%s:%d", conf.Host, conf.Port),
Path: conf.DBName,
RawQuery: (&url.Values{"sslmode": []string{"disable"}}).Encode(),
}
db, err := gorm.Open("postgres", dsn.String())

Answer 2

Followed the official docs and it worked for me,
Visit https://gorm.io/docs/connecting_to_the_database.html
import (
"gorm.io/driver/postgres"
"gorm.io/gorm"
)
dsn := "host=localhost user=gorm password=gorm dbname=gorm port=9920 sslmode=disable TimeZone=Asia/Shanghai"
db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})
I just had to remove the host variable and enter rest of the details and it works.

Answer 3

First of all, the question keeps spaces for imagination.
Anyway, here're the possible use-cases why you're not able to connect gorm to postgres:
Make sure your postgres is well running in the host you have specified (in this case: localhost)
If it's alright, make sure your user and password is alright
If everything is ok, you can check in the CLI:
$ sudo -i -u postgres
$ psql
If it's successful, that means something else in the code. As far as I can see, you did not show the import section. Did you silently import the postgres gorm dialects?
import _ "github.com/jinzhu/gorm/dialects/postgres"