/
repo.go
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/
repo.go
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package gorm
import (
"context"
"errors"
kerrors "github.com/go-kratos/kratos/v2/errors"
"gorm.io/gorm/clause"
eventbus "github.com/goxiaoy/go-eventbus"
"github.com/goxiaoy/go-saas-kit/pkg/data"
"github.com/goxiaoy/go-saas-kit/pkg/query"
sgorm "github.com/goxiaoy/go-saas/gorm"
"gorm.io/gorm"
)
const (
ConcurrentUpdateCode = "CONCURRENT_UPDATE"
)
var (
ErrConcurrency = kerrors.Conflict(ConcurrentUpdateCode, "")
)
type Repo[TEntity any, TKey any, TQuery any] struct {
DbProvider sgorm.DbProvider
Eventbus *eventbus.EventBus
override interface{}
}
var _ data.Repo[interface{}, interface{}, interface{}] = (*Repo[interface{}, interface{}, interface{}])(nil)
func NewRepo[TEntity any, TKey any, TQuery any](dbProvider sgorm.DbProvider, eventbus *eventbus.EventBus, override interface{}) *Repo[TEntity, TKey, TQuery] {
return &Repo[TEntity, TKey, TQuery]{DbProvider: dbProvider, Eventbus: eventbus, override: override}
}
type GetDb interface {
GetDb(ctx context.Context) *gorm.DB
}
func (r *Repo[TEntity, TKey, TQuery]) getDb(ctx context.Context) *gorm.DB {
if override, ok := r.override.(GetDb); ok {
return override.GetDb(ctx)
}
return r.DbProvider.Get(ctx, "")
}
type BuildDetailScope interface {
BuildDetailScope(withDetail bool) func(db *gorm.DB) *gorm.DB
}
//BuildDetailScope preload relations
func (r *Repo[TEntity, TKey, TQuery]) buildDetailScope(withDetail bool) func(db *gorm.DB) *gorm.DB {
if override, ok := r.override.(BuildDetailScope); ok {
return override.BuildDetailScope(withDetail)
}
return func(db *gorm.DB) *gorm.DB {
return db
}
}
type BuildFilterScope[TQuery any] interface {
BuildFilterScope(q *TQuery) func(db *gorm.DB) *gorm.DB
}
//BuildFilterScope filter
func (r *Repo[TEntity, TKey, TQuery]) buildFilterScope(q *TQuery) func(db *gorm.DB) *gorm.DB {
if override, ok := r.override.(BuildFilterScope[TQuery]); ok {
return override.BuildFilterScope(q)
}
return func(db *gorm.DB) *gorm.DB {
return db
}
}
type DefaultSorting interface {
DefaultSorting() []string
}
//DefaultSorting get default sorting
func (r *Repo[TEntity, TKey, TQuery]) defaultSorting() []string {
if override, ok := r.override.(DefaultSorting); ok {
return override.DefaultSorting()
}
return nil
}
type BuildSortScope[TQuery any] interface {
BuildSortScope(q *TQuery) func(db *gorm.DB) *gorm.DB
}
//BuildSortScope build sorting query
func (r *Repo[TEntity, TKey, TQuery]) buildSortScope(q *TQuery) func(db *gorm.DB) *gorm.DB {
if override, ok := r.override.(BuildSortScope[TQuery]); ok {
return override.BuildSortScope(q)
}
f, ok := (interface{})(q).(query.Sort)
if ok {
return SortScope(f, r.defaultSorting())
}
return func(db *gorm.DB) *gorm.DB {
return db
}
}
type BuildPageScope[TQuery any] interface {
BuildPageScope(q *TQuery) func(db *gorm.DB) *gorm.DB
}
type UpdateAssociation[TEntity any] interface {
UpdateAssociation(ctx context.Context, entity *TEntity) error
}
//BuildPageScope page query
func (r *Repo[TEntity, TKey, TQuery]) buildPageScope(q *TQuery) func(db *gorm.DB) *gorm.DB {
if override, ok := r.override.(BuildPageScope[TQuery]); ok {
return override.BuildPageScope(q)
}
f, ok := (interface{})(q).(query.Page)
if ok {
return PageScope(f)
}
return func(db *gorm.DB) *gorm.DB {
return db
}
}
func (r *Repo[TEntity, TKey, TQuery]) List(ctx context.Context, query *TQuery) ([]*TEntity, error) {
var e TEntity
db := r.getDb(ctx).Model(&e)
db = db.Scopes(r.buildFilterScope(query), r.buildDetailScope(false), r.buildSortScope(query), r.buildPageScope(query))
var items []*TEntity
res := db.Find(&items)
return items, res.Error
}
func (r *Repo[TEntity, TKey, TQuery]) First(ctx context.Context, query *TQuery) (*TEntity, error) {
var e TEntity
db := r.getDb(ctx).Model(&e)
db = db.Scopes(r.buildFilterScope(query), r.buildDetailScope(true))
var item TEntity
err := db.First(&item).Error
if err != nil {
if errors.Is(err, gorm.ErrRecordNotFound) {
return nil, nil
}
return nil, err
}
return &item, nil
}
func (r *Repo[TEntity, TKey, TQuery]) Count(ctx context.Context, query *TQuery) (total int64, filtered int64, err error) {
var e TEntity
db := r.getDb(ctx).Model(&e)
err = db.Count(&total).Error
if err != nil {
return
}
db = db.Scopes(r.buildFilterScope(query))
err = db.Count(&filtered).Error
return
}
func (r *Repo[TEntity, TKey, TQuery]) Get(ctx context.Context, id TKey) (*TEntity, error) {
var entity TEntity
err := r.getDb(ctx).Model(&entity).Scopes(r.buildDetailScope(true)).First(&entity, "id = ?", id).Error
if err != nil {
if errors.Is(err, gorm.ErrRecordNotFound) {
return nil, nil
}
return nil, err
}
return &entity, nil
}
func (r *Repo[TEntity, TKey, TQuery]) Create(ctx context.Context, entity *TEntity) error {
if err := eventbus.Publish[*data.BeforeCreate[*TEntity]](r.Eventbus)(ctx, data.NewBeforeCreate(entity)); err != nil {
return err
}
if err := r.getDb(ctx).Session(&gorm.Session{FullSaveAssociations: true}).Create(entity).Error; err != nil {
return err
}
if err := eventbus.Publish[*data.AfterCreate[*TEntity]](r.Eventbus)(ctx, data.NewAfterCreate(entity)); err != nil {
return err
}
return nil
}
func (r *Repo[TEntity, TKey, TQuery]) BatchCreate(ctx context.Context, entity []*TEntity, batchSize int) error {
for _, tEntity := range entity {
if err := eventbus.Publish[*data.BeforeCreate[*TEntity]](r.Eventbus)(ctx, data.NewBeforeCreate(tEntity)); err != nil {
return err
}
}
if err := r.getDb(ctx).CreateInBatches(entity, batchSize).Error; err != nil {
return err
}
for _, tEntity := range entity {
if err := eventbus.Publish[*data.AfterCreate[*TEntity]](r.Eventbus)(ctx, data.NewAfterCreate(tEntity)); err != nil {
return err
}
}
return nil
}
func (r *Repo[TEntity, TKey, TQuery]) Update(ctx context.Context, id TKey, entity *TEntity, p query.Select) error {
var e TEntity
db := r.getDb(ctx).Model(&e)
if p == nil {
db = db.Select("*")
}
if err := eventbus.Publish[*data.BeforeUpdate[*TEntity]](r.Eventbus)(ctx, data.NewBeforeUpdate(entity)); err != nil {
return err
}
if u, ok := r.override.(UpdateAssociation[TEntity]); ok {
if err := u.UpdateAssociation(ctx, &e); err != nil {
return err
}
}
updateRet := db.Where("id = ?", id).Select("*").Updates(entity)
if err := updateRet.Error; err != nil {
return err
}
//check row affected for concurrency
if updateRet.RowsAffected == 0 {
return ErrConcurrency
}
if err := eventbus.Publish[*data.AfterUpdate[*TEntity]](r.Eventbus)(ctx, data.NewAfterUpdate(entity)); err != nil {
return err
}
return nil
}
func (r *Repo[TEntity, TKey, TQuery]) Upsert(ctx context.Context, entity *TEntity) error {
var e TEntity
db := r.getDb(ctx).Model(&e)
return db.Clauses(clause.OnConflict{
UpdateAll: true,
}).Session(&gorm.Session{FullSaveAssociations: true}).Create(entity).Error
}
func (r *Repo[TEntity, TKey, TQuery]) Delete(ctx context.Context, id TKey) error {
var entity TEntity
err := r.getDb(ctx).Model(&entity).First(&entity, "id = ?", id).Error
if err != nil {
if errors.Is(err, gorm.ErrRecordNotFound) {
return kerrors.NotFound("", "")
}
return err
}
if err := eventbus.Publish[*data.BeforeDelete[*TEntity]](r.Eventbus)(ctx, data.NewBeforeDelete(&entity)); err != nil {
return err
}
if err := r.getDb(ctx).Delete(&entity, "id = ?", id).Error; err != nil {
return err
}
if err := eventbus.Publish[*data.AfterDelete[*TEntity]](r.Eventbus)(ctx, data.NewAfterDelete(&entity)); err != nil {
return err
}
return nil
}
func PageScope(page query.Page) func(db *gorm.DB) *gorm.DB {
return func(db *gorm.DB) *gorm.DB {
if page == nil {
return db
}
ret := db
if page.GetPageOffset() > 0 {
ret = db.Offset(int(page.GetPageOffset()))
}
if page.GetPageSize() > 0 {
ret = db.Limit(int(page.GetPageSize()))
}
return ret
}
}
// SortScope build sorting by sort and default d
func SortScope(sort query.Sort, d []string) func(db *gorm.DB) *gorm.DB {
return func(db *gorm.DB) *gorm.DB {
var s []string
if sort != nil {
s = sort.GetSort()
}
if len(s) == 0 {
s = d
}
parsed := data.ParseSort(s)
ret := db
if parsed != "" {
ret = ret.Order(parsed)
}
return ret
}
}