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dao

package
v2.0.7 Latest Latest
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 Go to latest Published: Sep 10, 2026 License: MIT Imports: 13 Imported by: 0

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Functions

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Types

type Dao 

type Dao[E any] interface {
	Insert(entity *E) error
	Where(query interface{}, args ...interface{}) *gorm.DB
	Find(query interface{}, args ...interface{}) ([]E, error)
	FindById(id interface{}) (E, error)
	Update(entity *E) error
	Delete(entity *E) error
	Count() (int64, error)
}

Dao[E] 是 mgin v2 扩展后的泛型 DAO 接口。

v1 时代仅包含 Insert(*E) error 一个方法，v2 扩展为与 db/dao/mysql.go、postgres.go、 clickhouse.go、mgo.go 等具体实现对齐的最小方法集。已有具体实现（MySQLDao 等）的方法 集合已经超过这个接口，因此把它们"补齐签名"以满足本接口即可。

注意：v2 Dao 接口仍然保持小而精，避免在接口里强加大量可选方法。具体实现可以 拥有接口之外的扩展方法（如 MySQLDao.Debug()、MySQLDao.WithContext()）， 业务需要时直接断言到具体类型调用。

type MgoDao 

type MgoDao[E any] struct {
	CollectionName string
	Tag            func() string
}

MgoDao 注意使用前必须先将CollectionName赋值

func (MgoDao[E]) All 

func (m MgoDao[E]) All(query bson.M) ([]E, error)

All mongo动态查询数据

func (MgoDao[E]) Delete 

func (m MgoDao[E]) Delete(query bson.M) error

Delete mongo动态删除数据

func (MgoDao[E]) Insert 

func (m MgoDao[E]) Insert(entity *E) error

Insert mongo动态插入数据

func (MgoDao[E]) One 

func (m MgoDao[E]) One(query bson.M) (*E, error)

One mongo动态查询一条数据

func (MgoDao[E]) Pager 

func (m MgoDao[E]) Pager(query bson.M, sort []string, page, size int) ([]E, *models.ResultPage, error)

Pager mongo简单分页查询数据

func (MgoDao[E]) Updates 

func (m MgoDao[E]) Updates(id primitive.ObjectID, doc E) error

Updates mongo动态更新数据

type MySQLDao 

type MySQLDao[E schema.Tabler] struct {
	Tag func() string
	// contains filtered or unexported fields
}

func (*MySQLDao[E]) Alias added in v2.0.7 

func (receiver *MySQLDao[E]) Alias(alias string) *gorm.DB

func (*MySQLDao[E]) All 

func (receiver *MySQLDao[E]) All(entity E, opts ...QueryOption) ([]E, error)

All mysql动态查询数据

func (*MySQLDao[E]) Count 

func (receiver *MySQLDao[E]) Count(entity E) (int64, error)

Count mysql统计记录数

func (*MySQLDao[E]) Create 

func (receiver *MySQLDao[E]) Create(entity *E) error

Create mysql动态插入数据

func (*MySQLDao[E]) DB added in v2.0.7 

func (receiver *MySQLDao[E]) DB() *gorm.DB

func (*MySQLDao[E]) Debug 

func (m *MySQLDao[E]) Debug() *MySQLDao[E]

func (*MySQLDao[E]) Delete 

func (receiver *MySQLDao[E]) Delete(entity E) error

Delete mysql动态删除数据

func (*MySQLDao[E]) Exists 

func (receiver *MySQLDao[E]) Exists(entity E) bool

Exists mysql动态查询是否存在数据

func (*MySQLDao[E]) JOIN added in v2.0.7 

func (receiver *MySQLDao[E]) JOIN(alias, query string, args ...interface{}) *gorm.DB

func (*MySQLDao[E]) MultiCreate 

func (receiver *MySQLDao[E]) MultiCreate(entities []*E) error

MultiCreate mysql动态插入多条数据

func (*MySQLDao[E]) One 

func (receiver *MySQLDao[E]) One(entity E) (*E, error)

One mysql动态查询一条数据

func (*MySQLDao[E]) Pager 

func (receiver *MySQLDao[E]) Pager(conn *gorm.DB, page, size int) ([]E, *models.ResultPage, error)

Pager mysql简单分页查询数据

func (*MySQLDao[E]) Save 

func (receiver *MySQLDao[E]) Save(entity *E) error

Save mysql动态保存数据

func (*MySQLDao[E]) Updates 

func (receiver *MySQLDao[E]) Updates(entity *E) error

Updates mysql动态更新数据

func (*MySQLDao[E]) Where 

func (m *MySQLDao[E]) Where(query interface{}, args ...interface{}) *gorm.DB

Where mysql动态查询数据

func (*MySQLDao[E]) WithContext 

func (m *MySQLDao[E]) WithContext(ctx *context.Context) *MySQLDao[E]

type QueryOption 

type QueryOption struct {
	Preloads []string
	OrderBy  []string
}

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