gorm/doc/database/connect-database.md

Database Connection

Connecting to a database

MySQL

NOTE don't forgot params parseTime to handle data type time.Time, more support parameters

import (
    "github.com/jinzhu/gorm"
    _ "github.com/go-sql-driver/mysql"
)
func main() {
  db, err := gorm.Open("mysql", "user:password@/dbname?charset=utf8&parseTime=True&loc=Local")
}

PostgreSQL

import (
    "github.com/jinzhu/gorm"
    _ "github.com/lib/pq"
)
func main() {
  db, err := gorm.Open("postgres", "user=gorm dbname=gorm sslmode=disable")
}

Sqlite3

import (
    "github.com/jinzhu/gorm"
    _ "github.com/mattn/go-sqlite3"
)
func main() {
  db, err := gorm.Open("sqlite3", "/tmp/gorm.db")
}

Write Dialect for unsupported databases

GORM officially support above databases, for unsupported databaes, you could write a dialect for that.

Refer: https://github.com/jinzhu/gorm/blob/master/dialect.go

Generic database object *sql.DB

*sql.DB

// Get generic database object *sql.DB to use its functions
db.DB()

// Connection Pool
db.DB().SetMaxIdleConns(10)
db.DB().SetMaxOpenConns(100)

  // Ping
db.DB().Ping()