/
gorm.go
82 lines (64 loc) · 1.7 KB
/
gorm.go
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package main
import (
"github.com/jinzhu/gorm"
_ "github.com/jinzhu/gorm/dialects/postgres"
)
func getGORMEngine() (*gorm.DB, error) {
db, err := gorm.Open(dialect, getDSN())
if err != nil {
return nil, err
}
return db, nil
}
func insertDataGORM(n int) {
// Connect to the database.
db, err := getGORMEngine()
if err != nil {
fatal("can't initialize xorm db", err)
}
defer func(){
fatal("can't close connection to database", db.Close())
}()
// Get the last index.
last := getLastBusStopID(db.DB())
// Randomly generate and write data to the database.
for i := last + 1; i <= n + last; i++ {
busStop := getBusStop(i)
fatal("can't insert bus stop", db.Create(&busStop).Error)
}
}
func updateDataGORM(n int) {
// Connect to the database.
db, err := getGORMEngine()
if err != nil {
fatal("can't initialize xorm db", err)
}
defer func(){
fatal("can't close connection to database", db.Close())
}()
// Get the first index.
first := getFirstBusStopID(db.DB())
// Randomly generate and write fake data to the database.
for i := first; i < n; i++ {
busStop := getBusStopForUpdate(i)
fatal("can't update bus stops", db.Save(&busStop).Error)
}
}
func selectDataGORM(n int) {
// Connect to the database.
db, err := getGORMEngine()
if err != nil {
fatal("can't initialize xorm db", err)
}
defer func(){
fatal("can't close connection to database", db.Close())
}()
// Get the first index.
first := getFirstBusStopID(db.DB())
// Randomly generate and write fake data to the database.
for i := first; i < n; i++ {
var busStop BusStop
// TODO: Try using First() and see if there's any difference.
fatal("can't select bus stops", db.Where("id = ?", i).Take(&busStop).Error)
}
}