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backend.go
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backend.go
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package persistence
import (
"context"
"kusionstack.io/kusion/pkg/domain/entity"
"kusionstack.io/kusion/pkg/domain/repository"
"gorm.io/gorm"
)
// The backendRepository type implements the repository.BackendRepository interface.
// If the backendRepository type does not implement all the methods of the interface,
// the compiler will produce an error.
var _ repository.BackendRepository = &backendRepository{}
// backendRepository is a repository that stores backends in a gorm database.
type backendRepository struct {
// db is the underlying gorm database where backends are stored.
db *gorm.DB
}
// NewBackendRepository creates a new backend repository.
func NewBackendRepository(db *gorm.DB) repository.BackendRepository {
return &backendRepository{db: db}
}
// Create saves a backend to the repository.
func (r *backendRepository) Create(ctx context.Context, dataEntity *entity.Backend) error {
// r.db.AutoMigrate(&BackendModel{})
err := dataEntity.Validate()
if err != nil {
return err
}
// Map the data from Entity to DO
var dataModel BackendModel
err = dataModel.FromEntity(dataEntity)
if err != nil {
return err
}
return r.db.Transaction(func(tx *gorm.DB) error {
// Create new record in the store
err = tx.WithContext(ctx).Create(&dataModel).Error
if err != nil {
return err
}
dataEntity.ID = dataModel.ID
return nil
})
}
// Delete removes a backend from the repository.
func (r *backendRepository) Delete(ctx context.Context, id uint) error {
return r.db.Transaction(func(tx *gorm.DB) error {
var dataModel BackendModel
err := tx.WithContext(ctx).First(&dataModel, id).Error
if err != nil {
return err
}
return tx.WithContext(ctx).Delete(&dataModel).Error
})
}
// Update updates an existing backend in the repository.
func (r *backendRepository) Update(ctx context.Context, dataEntity *entity.Backend) error {
// Map the data from Entity to DO
var dataModel BackendModel
err := dataModel.FromEntity(dataEntity)
if err != nil {
return err
}
err = r.db.WithContext(ctx).Updates(&dataModel).Error
if err != nil {
return err
}
return nil
}
// Get retrieves a backend by its ID.
func (r *backendRepository) Get(ctx context.Context, id uint) (*entity.Backend, error) {
var dataModel BackendModel
err := r.db.WithContext(ctx).First(&dataModel, id).Error
if err != nil {
return nil, err
}
return dataModel.ToEntity()
}
// GetByName retrieves a backend by its name.
func (r *backendRepository) GetByName(ctx context.Context, name string) (*entity.Backend, error) {
var dataModel BackendModel
err := r.db.WithContext(ctx).Where("name = ?", name).First(&dataModel).Error
if err != nil {
return nil, err
}
return dataModel.ToEntity()
}
// List retrieves all backends.
func (r *backendRepository) List(ctx context.Context) ([]*entity.Backend, error) {
var dataModel []BackendModel
backendEntityList := make([]*entity.Backend, 0)
result := r.db.WithContext(ctx).Find(&dataModel)
if result.Error != nil {
return nil, result.Error
}
for _, backend := range dataModel {
backendEntity, err := backend.ToEntity()
if err != nil {
return nil, err
}
backendEntityList = append(backendEntityList, backendEntity)
}
return backendEntityList, nil
}