/
db.go
106 lines (88 loc) · 2.07 KB
/
db.go
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package gormx
import (
"fmt"
"gorm.io/driver/mysql"
"gorm.io/driver/postgres"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
"gorm.io/gorm/logger"
"gorm.io/gorm/schema"
)
var db *gorm.DB
var metadataEngine string
var metadataDSN string
// LoadDBOptions is the options for LoadDB
type LoadDBOptions struct {
IsProd bool
//
TablePrefix string
//
DryRun bool
}
// GetDB returns the gorm.DB instance
func GetDB() *gorm.DB {
if db == nil {
panic("DB is not initialized")
}
return db
}
// SetDB sets the global gorm.DB instance.
// This is useful for old projects that already use gorm.
func SetDB(d *gorm.DB) {
db = d
}
// GetEngine returns the database engine
func GetEngine() string {
return metadataEngine
}
// GetDSN returns the database DSN
func GetDSN() string {
return metadataDSN
}
// LoadDB loads the database
func LoadDB(engine string, dsn string, opts ...func(*LoadDBOptions)) (err error) {
db, err = Connect(engine, dsn, opts...)
if err != nil {
return fmt.Errorf("connecting database failed: %s", err.Error())
}
return nil
}
// Connect connects the database
func Connect(engine string, dsn string, opts ...func(*LoadDBOptions)) (db *gorm.DB, err error) {
opt := &LoadDBOptions{}
for _, o := range opts {
o(opt)
}
var dialector gorm.Dialector
switch engine {
case "postgres":
dialector = postgres.Open(dsn)
case "mysql":
dialector = mysql.Open(dsn)
case "sqlite":
dialector = sqlite.Open(dsn)
default:
return nil, fmt.Errorf("unknown engine: %s", engine)
}
metadataEngine = engine
metadataDSN = dsn
logLevel := logger.Info
if opt.IsProd {
logLevel = logger.Error
}
db, err = gorm.Open(dialector, &gorm.Config{
SkipDefaultTransaction: false,
NamingStrategy: schema.NamingStrategy{
SingularTable: true,
TablePrefix: opt.TablePrefix,
},
Logger: logger.Default.LogMode(logLevel), // Print SQL queries
DisableAutomaticPing: false,
// DisableForeignKeyConstraintWhenMigrating: true,
DryRun: opt.DryRun,
})
if err != nil {
return nil, fmt.Errorf("connecting database failed: %s", err.Error())
}
return db, nil
}