/
create_migration.go
57 lines (43 loc) · 1 KB
/
create_migration.go
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package migrate
import (
"fmt"
"io/ioutil"
"os"
"time"
)
// CreateMigration - Create the migration file with template.
func CreateMigration(purpose string) (string, error) {
if purpose == "" {
return "", ErrEmptyPurpose
}
// Create migration folder anyway.
_ = os.Mkdir("./migration", os.ModePerm)
migrationTemplate :=
`package main
import (
"gorm.io/gorm"
)
type migration string
// Up - Changes for the migration.
func (m migration) Up(db *gorm.DB) error {
return nil
}
// Down - Rollback changes for the migration.
func (m migration) Down(db *gorm.DB) error {
return nil
}
var Migration migration`
targetFileName := MigrationTargetFolder + "/" + time.Now().Format("20060102150405") + "_" + purpose + ".go"
if fileExists(targetFileName) {
return "", ErrDuplicatedMigration
}
err := ioutil.WriteFile(
targetFileName,
[]byte(migrationTemplate),
os.ModePerm,
)
if err != nil {
return "", fmt.Errorf("%v (%v)", "Create migration failed.", err.Error())
}
return targetFileName, nil
}