reCoreD-UI/database/basemapper.go

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2024-04-09 05:06:31 +00:00
package database
import (
"errors"
"gorm.io/gorm"
)
type BaseDAO[T any] struct {
db *gorm.DB
}
func NewDAO[T any](db *gorm.DB) *BaseDAO[T] {
return &BaseDAO[T]{
db: db,
}
}
/* Single Table Operations */
func (b *BaseDAO[T]) GetAll(e T) ([]T, error) {
var r []T
if err := b.db.Find(&r, e).Error; err != nil {
return nil, err
}
return r, nil
}
func (b *BaseDAO[T]) GetOne(e T) (T, error) {
var r T
if err := b.db.First(&r, e).Error; err != nil {
return r, err
}
return r, nil
}
func (b *BaseDAO[T]) GetSome(e T, limit, offset int) ([]T, error) {
var r []T
if err := b.db.Find(&r, e).Limit(limit).Offset(offset).Error; err != nil {
return nil, err
}
return r, nil
}
func (b *BaseDAO[T]) Create(e T) (T, error) {
if err := b.db.Create(&e).Error; err != nil {
return e, err
}
return e, nil
}
func (b *BaseDAO[T]) Update(e T) (T, error) {
if err := b.db.Updates(&e).Error; err != nil {
return e, err
}
return e, nil
}
func (b *BaseDAO[T]) UpdateOrCreate(e T) (T, error) {
var r T
err := b.db.First(&r, e).Error
if err != nil {
if errors.Is(err, gorm.ErrRecordNotFound) {
return b.Create(e)
}
return e, err
}
return b.Update(e)
}
func (b *BaseDAO[T]) Delete(e T) error {
if err := b.db.Delete(e).Error; err != nil {
return err
}
return nil
}