migrate/database/util.go

16 lines
348 B
Go

package database
import (
"fmt"
"hash/crc32"
)
const advisoryLockIdSalt uint = 1486364155
// inspired by rails migrations, see https://goo.gl/8o9bCT
func GenerateAdvisoryLockId(databaseName string) (string, error) {
sum := crc32.ChecksumIEEE([]byte(databaseName))
sum = sum * uint32(advisoryLockIdSalt)
return fmt.Sprintf("%v", sum), nil
}