diff --git a/dal/model/accounts.gen.go b/dal/model/accounts.gen.go
new file mode 100644
index 00000000..21b4a90e
--- /dev/null
+++ b/dal/model/accounts.gen.go
@@ -0,0 +1,28 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package model
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+const TableNameAccountInfo = "accounts"
+
+// AccountInfo mapped from table <accounts>
+type AccountInfo struct {
+	ID        int64          `gorm:"column:id;primaryKey;autoIncrement:true" json:"id"`
+	CreatedAt time.Time      `gorm:"column:created_at" json:"created_at"`
+	UpdatedAt time.Time      `gorm:"column:updated_at" json:"updated_at"`
+	DeletedAt gorm.DeletedAt `gorm:"column:deleted_at" json:"deleted_at"`
+	UserID    int64          `gorm:"column:user_id" json:"user_id"`
+	Number    string         `gorm:"column:number" json:"number"`
+}
+
+// TableName AccountInfo's table name
+func (*AccountInfo) TableName() string {
+	return TableNameAccountInfo
+}
diff --git a/dal/model/users.gen.go b/dal/model/users.gen.go
new file mode 100644
index 00000000..2a5b572d
--- /dev/null
+++ b/dal/model/users.gen.go
@@ -0,0 +1,33 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package model
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+const TableNameUser = "users"
+
+// User mapped from table <users>
+type User struct {
+	ID        int64          `gorm:"column:id;primaryKey;autoIncrement:true" json:"id"`
+	CreatedAt time.Time      `gorm:"column:created_at" json:"created_at"`
+	UpdatedAt time.Time      `gorm:"column:updated_at" json:"updated_at"`
+	DeletedAt gorm.DeletedAt `gorm:"column:deleted_at" json:"deleted_at"`
+	Name      string         `gorm:"column:name" json:"name"`
+	Age       int64          `gorm:"column:age" json:"age"`
+	Birthday  time.Time      `gorm:"column:birthday" json:"birthday"`
+	Area      string         `gorm:"column:area;not null;comment:数据地址" json:"area"` // 数据地址
+	CompanyID int64          `gorm:"column:company_id" json:"company_id"`
+	ManagerID int64          `gorm:"column:manager_id" json:"manager_id"`
+	Active    bool           `gorm:"column:active" json:"active"`
+}
+
+// TableName User's table name
+func (*User) TableName() string {
+	return TableNameUser
+}
diff --git a/dal/query/accounts.gen.go b/dal/query/accounts.gen.go
new file mode 100644
index 00000000..9b3d3ab0
--- /dev/null
+++ b/dal/query/accounts.gen.go
@@ -0,0 +1,349 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package query
+
+import (
+	"context"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+	"gorm.io/gorm/schema"
+
+	"gorm.io/gen"
+	"gorm.io/gen/field"
+
+	"gorm.io/plugin/dbresolver"
+
+	"gorm.io/playground/dal/model"
+)
+
+func newAccountInfo(db *gorm.DB, opts ...gen.DOOption) accountInfo {
+	_accountInfo := accountInfo{}
+
+	_accountInfo.accountInfoDo.UseDB(db, opts...)
+	_accountInfo.accountInfoDo.UseModel(&model.AccountInfo{})
+
+	tableName := _accountInfo.accountInfoDo.TableName()
+	_accountInfo.ALL = field.NewAsterisk(tableName)
+	_accountInfo.ID = field.NewInt64(tableName, "id")
+	_accountInfo.CreatedAt = field.NewTime(tableName, "created_at")
+	_accountInfo.UpdatedAt = field.NewTime(tableName, "updated_at")
+	_accountInfo.DeletedAt = field.NewField(tableName, "deleted_at")
+	_accountInfo.UserID = field.NewInt64(tableName, "user_id")
+	_accountInfo.Number = field.NewString(tableName, "number")
+
+	_accountInfo.fillFieldMap()
+
+	return _accountInfo
+}
+
+type accountInfo struct {
+	accountInfoDo accountInfoDo
+
+	ALL       field.Asterisk
+	ID        field.Int64
+	CreatedAt field.Time
+	UpdatedAt field.Time
+	DeletedAt field.Field
+	UserID    field.Int64
+	Number    field.String
+
+	fieldMap map[string]field.Expr
+}
+
+func (a accountInfo) Table(newTableName string) *accountInfo {
+	a.accountInfoDo.UseTable(newTableName)
+	return a.updateTableName(newTableName)
+}
+
+func (a accountInfo) As(alias string) *accountInfo {
+	a.accountInfoDo.DO = *(a.accountInfoDo.As(alias).(*gen.DO))
+	return a.updateTableName(alias)
+}
+
+func (a *accountInfo) updateTableName(table string) *accountInfo {
+	a.ALL = field.NewAsterisk(table)
+	a.ID = field.NewInt64(table, "id")
+	a.CreatedAt = field.NewTime(table, "created_at")
+	a.UpdatedAt = field.NewTime(table, "updated_at")
+	a.DeletedAt = field.NewField(table, "deleted_at")
+	a.UserID = field.NewInt64(table, "user_id")
+	a.Number = field.NewString(table, "number")
+
+	a.fillFieldMap()
+
+	return a
+}
+
+func (a *accountInfo) WithContext(ctx context.Context) *accountInfoDo {
+	return a.accountInfoDo.WithContext(ctx)
+}
+
+func (a accountInfo) TableName() string { return a.accountInfoDo.TableName() }
+
+func (a accountInfo) Alias() string { return a.accountInfoDo.Alias() }
+
+func (a accountInfo) Columns(cols ...field.Expr) gen.Columns { return a.accountInfoDo.Columns(cols...) }
+
+func (a *accountInfo) GetFieldByName(fieldName string) (field.OrderExpr, bool) {
+	_f, ok := a.fieldMap[fieldName]
+	if !ok || _f == nil {
+		return nil, false
+	}
+	_oe, ok := _f.(field.OrderExpr)
+	return _oe, ok
+}
+
+func (a *accountInfo) fillFieldMap() {
+	a.fieldMap = make(map[string]field.Expr, 6)
+	a.fieldMap["id"] = a.ID
+	a.fieldMap["created_at"] = a.CreatedAt
+	a.fieldMap["updated_at"] = a.UpdatedAt
+	a.fieldMap["deleted_at"] = a.DeletedAt
+	a.fieldMap["user_id"] = a.UserID
+	a.fieldMap["number"] = a.Number
+}
+
+func (a accountInfo) clone(db *gorm.DB) accountInfo {
+	a.accountInfoDo.ReplaceConnPool(db.Statement.ConnPool)
+	return a
+}
+
+func (a accountInfo) replaceDB(db *gorm.DB) accountInfo {
+	a.accountInfoDo.ReplaceDB(db)
+	return a
+}
+
+type accountInfoDo struct{ gen.DO }
+
+func (a accountInfoDo) Debug() *accountInfoDo {
+	return a.withDO(a.DO.Debug())
+}
+
+func (a accountInfoDo) WithContext(ctx context.Context) *accountInfoDo {
+	return a.withDO(a.DO.WithContext(ctx))
+}
+
+func (a accountInfoDo) ReadDB() *accountInfoDo {
+	return a.Clauses(dbresolver.Read)
+}
+
+func (a accountInfoDo) WriteDB() *accountInfoDo {
+	return a.Clauses(dbresolver.Write)
+}
+
+func (a accountInfoDo) Session(config *gorm.Session) *accountInfoDo {
+	return a.withDO(a.DO.Session(config))
+}
+
+func (a accountInfoDo) Clauses(conds ...clause.Expression) *accountInfoDo {
+	return a.withDO(a.DO.Clauses(conds...))
+}
+
+func (a accountInfoDo) Returning(value interface{}, columns ...string) *accountInfoDo {
+	return a.withDO(a.DO.Returning(value, columns...))
+}
+
+func (a accountInfoDo) Not(conds ...gen.Condition) *accountInfoDo {
+	return a.withDO(a.DO.Not(conds...))
+}
+
+func (a accountInfoDo) Or(conds ...gen.Condition) *accountInfoDo {
+	return a.withDO(a.DO.Or(conds...))
+}
+
+func (a accountInfoDo) Select(conds ...field.Expr) *accountInfoDo {
+	return a.withDO(a.DO.Select(conds...))
+}
+
+func (a accountInfoDo) Where(conds ...gen.Condition) *accountInfoDo {
+	return a.withDO(a.DO.Where(conds...))
+}
+
+func (a accountInfoDo) Order(conds ...field.Expr) *accountInfoDo {
+	return a.withDO(a.DO.Order(conds...))
+}
+
+func (a accountInfoDo) Distinct(cols ...field.Expr) *accountInfoDo {
+	return a.withDO(a.DO.Distinct(cols...))
+}
+
+func (a accountInfoDo) Omit(cols ...field.Expr) *accountInfoDo {
+	return a.withDO(a.DO.Omit(cols...))
+}
+
+func (a accountInfoDo) Join(table schema.Tabler, on ...field.Expr) *accountInfoDo {
+	return a.withDO(a.DO.Join(table, on...))
+}
+
+func (a accountInfoDo) LeftJoin(table schema.Tabler, on ...field.Expr) *accountInfoDo {
+	return a.withDO(a.DO.LeftJoin(table, on...))
+}
+
+func (a accountInfoDo) RightJoin(table schema.Tabler, on ...field.Expr) *accountInfoDo {
+	return a.withDO(a.DO.RightJoin(table, on...))
+}
+
+func (a accountInfoDo) Group(cols ...field.Expr) *accountInfoDo {
+	return a.withDO(a.DO.Group(cols...))
+}
+
+func (a accountInfoDo) Having(conds ...gen.Condition) *accountInfoDo {
+	return a.withDO(a.DO.Having(conds...))
+}
+
+func (a accountInfoDo) Limit(limit int) *accountInfoDo {
+	return a.withDO(a.DO.Limit(limit))
+}
+
+func (a accountInfoDo) Offset(offset int) *accountInfoDo {
+	return a.withDO(a.DO.Offset(offset))
+}
+
+func (a accountInfoDo) Scopes(funcs ...func(gen.Dao) gen.Dao) *accountInfoDo {
+	return a.withDO(a.DO.Scopes(funcs...))
+}
+
+func (a accountInfoDo) Unscoped() *accountInfoDo {
+	return a.withDO(a.DO.Unscoped())
+}
+
+func (a accountInfoDo) Create(values ...*model.AccountInfo) error {
+	if len(values) == 0 {
+		return nil
+	}
+	return a.DO.Create(values)
+}
+
+func (a accountInfoDo) CreateInBatches(values []*model.AccountInfo, batchSize int) error {
+	return a.DO.CreateInBatches(values, batchSize)
+}
+
+// Save : !!! underlying implementation is different with GORM
+// The method is equivalent to executing the statement: db.Clauses(clause.OnConflict{UpdateAll: true}).Create(values)
+func (a accountInfoDo) Save(values ...*model.AccountInfo) error {
+	if len(values) == 0 {
+		return nil
+	}
+	return a.DO.Save(values)
+}
+
+func (a accountInfoDo) First() (*model.AccountInfo, error) {
+	if result, err := a.DO.First(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.AccountInfo), nil
+	}
+}
+
+func (a accountInfoDo) Take() (*model.AccountInfo, error) {
+	if result, err := a.DO.Take(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.AccountInfo), nil
+	}
+}
+
+func (a accountInfoDo) Last() (*model.AccountInfo, error) {
+	if result, err := a.DO.Last(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.AccountInfo), nil
+	}
+}
+
+func (a accountInfoDo) Find() ([]*model.AccountInfo, error) {
+	result, err := a.DO.Find()
+	return result.([]*model.AccountInfo), err
+}
+
+func (a accountInfoDo) FindInBatch(batchSize int, fc func(tx gen.Dao, batch int) error) (results []*model.AccountInfo, err error) {
+	buf := make([]*model.AccountInfo, 0, batchSize)
+	err = a.DO.FindInBatches(&buf, batchSize, func(tx gen.Dao, batch int) error {
+		defer func() { results = append(results, buf...) }()
+		return fc(tx, batch)
+	})
+	return results, err
+}
+
+func (a accountInfoDo) FindInBatches(result *[]*model.AccountInfo, batchSize int, fc func(tx gen.Dao, batch int) error) error {
+	return a.DO.FindInBatches(result, batchSize, fc)
+}
+
+func (a accountInfoDo) Attrs(attrs ...field.AssignExpr) *accountInfoDo {
+	return a.withDO(a.DO.Attrs(attrs...))
+}
+
+func (a accountInfoDo) Assign(attrs ...field.AssignExpr) *accountInfoDo {
+	return a.withDO(a.DO.Assign(attrs...))
+}
+
+func (a accountInfoDo) Joins(fields ...field.RelationField) *accountInfoDo {
+	for _, _f := range fields {
+		a = *a.withDO(a.DO.Joins(_f))
+	}
+	return &a
+}
+
+func (a accountInfoDo) Preload(fields ...field.RelationField) *accountInfoDo {
+	for _, _f := range fields {
+		a = *a.withDO(a.DO.Preload(_f))
+	}
+	return &a
+}
+
+func (a accountInfoDo) FirstOrInit() (*model.AccountInfo, error) {
+	if result, err := a.DO.FirstOrInit(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.AccountInfo), nil
+	}
+}
+
+func (a accountInfoDo) FirstOrCreate() (*model.AccountInfo, error) {
+	if result, err := a.DO.FirstOrCreate(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.AccountInfo), nil
+	}
+}
+
+func (a accountInfoDo) FindByPage(offset int, limit int) (result []*model.AccountInfo, count int64, err error) {
+	result, err = a.Offset(offset).Limit(limit).Find()
+	if err != nil {
+		return
+	}
+
+	if size := len(result); 0 < limit && 0 < size && size < limit {
+		count = int64(size + offset)
+		return
+	}
+
+	count, err = a.Offset(-1).Limit(-1).Count()
+	return
+}
+
+func (a accountInfoDo) ScanByPage(result interface{}, offset int, limit int) (count int64, err error) {
+	count, err = a.Count()
+	if err != nil {
+		return
+	}
+
+	err = a.Offset(offset).Limit(limit).Scan(result)
+	return
+}
+
+func (a accountInfoDo) Scan(result interface{}) (err error) {
+	return a.DO.Scan(result)
+}
+
+func (a accountInfoDo) Delete(models ...*model.AccountInfo) (result gen.ResultInfo, err error) {
+	return a.DO.Delete(models)
+}
+
+func (a *accountInfoDo) withDO(do gen.Dao) *accountInfoDo {
+	a.DO = *do.(*gen.DO)
+	return a
+}
diff --git a/dal/query/accounts.gen_test.go b/dal/query/accounts.gen_test.go
new file mode 100644
index 00000000..b75f3766
--- /dev/null
+++ b/dal/query/accounts.gen_test.go
@@ -0,0 +1,145 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package query
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	"gorm.io/gen"
+	"gorm.io/gen/field"
+	"gorm.io/gorm/clause"
+	"gorm.io/playground/dal/model"
+)
+
+func init() {
+	InitializeDB()
+	err := _gen_test_db.AutoMigrate(&model.AccountInfo{})
+	if err != nil {
+		fmt.Printf("Error: AutoMigrate(&model.AccountInfo{}) fail: %s", err)
+	}
+}
+
+func Test_accountInfoQuery(t *testing.T) {
+	accountInfo := newAccountInfo(_gen_test_db)
+	accountInfo = *accountInfo.As(accountInfo.TableName())
+	_do := accountInfo.WithContext(context.Background()).Debug()
+
+	primaryKey := field.NewString(accountInfo.TableName(), clause.PrimaryKey)
+	_, err := _do.Unscoped().Where(primaryKey.IsNotNull()).Delete()
+	if err != nil {
+		t.Error("clean table <accounts> fail:", err)
+		return
+	}
+
+	_, ok := accountInfo.GetFieldByName("")
+	if ok {
+		t.Error("GetFieldByName(\"\") from accountInfo success")
+	}
+
+	err = _do.Create(&model.AccountInfo{})
+	if err != nil {
+		t.Error("create item in table <accounts> fail:", err)
+	}
+
+	err = _do.Save(&model.AccountInfo{})
+	if err != nil {
+		t.Error("create item in table <accounts> fail:", err)
+	}
+
+	err = _do.CreateInBatches([]*model.AccountInfo{{}, {}}, 10)
+	if err != nil {
+		t.Error("create item in table <accounts> fail:", err)
+	}
+
+	_, err = _do.Select(accountInfo.ALL).Take()
+	if err != nil {
+		t.Error("Take() on table <accounts> fail:", err)
+	}
+
+	_, err = _do.First()
+	if err != nil {
+		t.Error("First() on table <accounts> fail:", err)
+	}
+
+	_, err = _do.Last()
+	if err != nil {
+		t.Error("First() on table <accounts> fail:", err)
+	}
+
+	_, err = _do.Where(primaryKey.IsNotNull()).FindInBatch(10, func(tx gen.Dao, batch int) error { return nil })
+	if err != nil {
+		t.Error("FindInBatch() on table <accounts> fail:", err)
+	}
+
+	err = _do.Where(primaryKey.IsNotNull()).FindInBatches(&[]*model.AccountInfo{}, 10, func(tx gen.Dao, batch int) error { return nil })
+	if err != nil {
+		t.Error("FindInBatches() on table <accounts> fail:", err)
+	}
+
+	_, err = _do.Select(accountInfo.ALL).Where(primaryKey.IsNotNull()).Order(primaryKey.Desc()).Find()
+	if err != nil {
+		t.Error("Find() on table <accounts> fail:", err)
+	}
+
+	_, err = _do.Distinct(primaryKey).Take()
+	if err != nil {
+		t.Error("select Distinct() on table <accounts> fail:", err)
+	}
+
+	_, err = _do.Select(accountInfo.ALL).Omit(primaryKey).Take()
+	if err != nil {
+		t.Error("Omit() on table <accounts> fail:", err)
+	}
+
+	_, err = _do.Group(primaryKey).Find()
+	if err != nil {
+		t.Error("Group() on table <accounts> fail:", err)
+	}
+
+	_, err = _do.Scopes(func(dao gen.Dao) gen.Dao { return dao.Where(primaryKey.IsNotNull()) }).Find()
+	if err != nil {
+		t.Error("Scopes() on table <accounts> fail:", err)
+	}
+
+	_, _, err = _do.FindByPage(0, 1)
+	if err != nil {
+		t.Error("FindByPage() on table <accounts> fail:", err)
+	}
+
+	_, err = _do.ScanByPage(&model.AccountInfo{}, 0, 1)
+	if err != nil {
+		t.Error("ScanByPage() on table <accounts> fail:", err)
+	}
+
+	_, err = _do.Attrs(primaryKey).Assign(primaryKey).FirstOrInit()
+	if err != nil {
+		t.Error("FirstOrInit() on table <accounts> fail:", err)
+	}
+
+	_, err = _do.Attrs(primaryKey).Assign(primaryKey).FirstOrCreate()
+	if err != nil {
+		t.Error("FirstOrCreate() on table <accounts> fail:", err)
+	}
+
+	var _a _another
+	var _aPK = field.NewString(_a.TableName(), "id")
+
+	err = _do.Join(&_a, primaryKey.EqCol(_aPK)).Scan(map[string]interface{}{})
+	if err != nil {
+		t.Error("Join() on table <accounts> fail:", err)
+	}
+
+	err = _do.LeftJoin(&_a, primaryKey.EqCol(_aPK)).Scan(map[string]interface{}{})
+	if err != nil {
+		t.Error("LeftJoin() on table <accounts> fail:", err)
+	}
+
+	_, err = _do.Not().Or().Clauses().Take()
+	if err != nil {
+		t.Error("Not/Or/Clauses on table <accounts> fail:", err)
+	}
+}
diff --git a/dal/query/gen.go b/dal/query/gen.go
new file mode 100644
index 00000000..570363c3
--- /dev/null
+++ b/dal/query/gen.go
@@ -0,0 +1,111 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package query
+
+import (
+	"context"
+	"database/sql"
+
+	"gorm.io/gorm"
+
+	"gorm.io/gen"
+
+	"gorm.io/plugin/dbresolver"
+)
+
+var (
+	Q           = new(Query)
+	AccountInfo *accountInfo
+	User        *user
+)
+
+func SetDefault(db *gorm.DB, opts ...gen.DOOption) {
+	*Q = *Use(db, opts...)
+	AccountInfo = &Q.AccountInfo
+	User = &Q.User
+}
+
+func Use(db *gorm.DB, opts ...gen.DOOption) *Query {
+	return &Query{
+		db:          db,
+		AccountInfo: newAccountInfo(db, opts...),
+		User:        newUser(db, opts...),
+	}
+}
+
+type Query struct {
+	db *gorm.DB
+
+	AccountInfo accountInfo
+	User        user
+}
+
+func (q *Query) Available() bool { return q.db != nil }
+
+func (q *Query) clone(db *gorm.DB) *Query {
+	return &Query{
+		db:          db,
+		AccountInfo: q.AccountInfo.clone(db),
+		User:        q.User.clone(db),
+	}
+}
+
+func (q *Query) ReadDB() *Query {
+	return q.ReplaceDB(q.db.Clauses(dbresolver.Read))
+}
+
+func (q *Query) WriteDB() *Query {
+	return q.ReplaceDB(q.db.Clauses(dbresolver.Write))
+}
+
+func (q *Query) ReplaceDB(db *gorm.DB) *Query {
+	return &Query{
+		db:          db,
+		AccountInfo: q.AccountInfo.replaceDB(db),
+		User:        q.User.replaceDB(db),
+	}
+}
+
+type queryCtx struct {
+	AccountInfo *accountInfoDo
+	User        *userDo
+}
+
+func (q *Query) WithContext(ctx context.Context) *queryCtx {
+	return &queryCtx{
+		AccountInfo: q.AccountInfo.WithContext(ctx),
+		User:        q.User.WithContext(ctx),
+	}
+}
+
+func (q *Query) Transaction(fc func(tx *Query) error, opts ...*sql.TxOptions) error {
+	return q.db.Transaction(func(tx *gorm.DB) error { return fc(q.clone(tx)) }, opts...)
+}
+
+func (q *Query) Begin(opts ...*sql.TxOptions) *QueryTx {
+	tx := q.db.Begin(opts...)
+	return &QueryTx{Query: q.clone(tx), Error: tx.Error}
+}
+
+type QueryTx struct {
+	*Query
+	Error error
+}
+
+func (q *QueryTx) Commit() error {
+	return q.db.Commit().Error
+}
+
+func (q *QueryTx) Rollback() error {
+	return q.db.Rollback().Error
+}
+
+func (q *QueryTx) SavePoint(name string) error {
+	return q.db.SavePoint(name).Error
+}
+
+func (q *QueryTx) RollbackTo(name string) error {
+	return q.db.RollbackTo(name).Error
+}
diff --git a/dal/query/gen_test.go b/dal/query/gen_test.go
new file mode 100644
index 00000000..28de5b50
--- /dev/null
+++ b/dal/query/gen_test.go
@@ -0,0 +1,119 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package query
+
+import (
+	"context"
+	"fmt"
+	"reflect"
+	"sync"
+	"testing"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+)
+
+type Input struct {
+	Args []interface{}
+}
+
+type Expectation struct {
+	Ret []interface{}
+}
+
+type TestCase struct {
+	Input
+	Expectation
+}
+
+const _gen_test_db_name = "gen_test.db"
+
+var _gen_test_db *gorm.DB
+var _gen_test_once sync.Once
+
+func init() {
+	InitializeDB()
+	_gen_test_db.AutoMigrate(&_another{})
+}
+
+func InitializeDB() {
+	_gen_test_once.Do(func() {
+		var err error
+		_gen_test_db, err = gorm.Open(sqlite.Open(_gen_test_db_name), &gorm.Config{})
+		if err != nil {
+			panic(fmt.Errorf("open sqlite %q fail: %w", _gen_test_db_name, err))
+		}
+	})
+}
+
+func assert(t *testing.T, methodName string, res, exp interface{}) {
+	if !reflect.DeepEqual(res, exp) {
+		t.Errorf("%v() gotResult = %v, want %v", methodName, res, exp)
+	}
+}
+
+type _another struct {
+	ID uint64 `gorm:"primaryKey"`
+}
+
+func (*_another) TableName() string { return "another_for_unit_test" }
+
+func Test_Available(t *testing.T) {
+	if !Use(_gen_test_db).Available() {
+		t.Errorf("query.Available() == false")
+	}
+}
+
+func Test_WithContext(t *testing.T) {
+	query := Use(_gen_test_db)
+	if !query.Available() {
+		t.Errorf("query Use(_gen_test_db) fail: query.Available() == false")
+	}
+
+	type Content string
+	var key, value Content = "gen_tag", "unit_test"
+	qCtx := query.WithContext(context.WithValue(context.Background(), key, value))
+
+	for _, ctx := range []context.Context{
+		qCtx.AccountInfo.UnderlyingDB().Statement.Context,
+		qCtx.User.UnderlyingDB().Statement.Context,
+	} {
+		if v := ctx.Value(key); v != value {
+			t.Errorf("get value from context fail, expect %q, got %q", value, v)
+		}
+	}
+}
+
+func Test_Transaction(t *testing.T) {
+	query := Use(_gen_test_db)
+	if !query.Available() {
+		t.Errorf("query Use(_gen_test_db) fail: query.Available() == false")
+	}
+
+	err := query.Transaction(func(tx *Query) error { return nil })
+	if err != nil {
+		t.Errorf("query.Transaction execute fail: %s", err)
+	}
+
+	tx := query.Begin()
+
+	err = tx.SavePoint("point")
+	if err != nil {
+		t.Errorf("query tx SavePoint fail: %s", err)
+	}
+	err = tx.RollbackTo("point")
+	if err != nil {
+		t.Errorf("query tx RollbackTo fail: %s", err)
+	}
+	err = tx.Commit()
+	if err != nil {
+		t.Errorf("query tx Commit fail: %s", err)
+	}
+
+	err = query.Begin().Rollback()
+	if err != nil {
+		t.Errorf("query tx Rollback fail: %s", err)
+	}
+}
diff --git a/dal/query/users.gen.go b/dal/query/users.gen.go
new file mode 100644
index 00000000..0849694c
--- /dev/null
+++ b/dal/query/users.gen.go
@@ -0,0 +1,367 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package query
+
+import (
+	"context"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+	"gorm.io/gorm/schema"
+
+	"gorm.io/gen"
+	"gorm.io/gen/field"
+
+	"gorm.io/plugin/dbresolver"
+
+	"gorm.io/playground/dal/model"
+)
+
+func newUser(db *gorm.DB, opts ...gen.DOOption) user {
+	_user := user{}
+
+	_user.userDo.UseDB(db, opts...)
+	_user.userDo.UseModel(&model.User{})
+
+	tableName := _user.userDo.TableName()
+	_user.ALL = field.NewAsterisk(tableName)
+	_user.ID = field.NewInt64(tableName, "id")
+	_user.CreatedAt = field.NewTime(tableName, "created_at")
+	_user.UpdatedAt = field.NewTime(tableName, "updated_at")
+	_user.DeletedAt = field.NewField(tableName, "deleted_at")
+	_user.Name = field.NewString(tableName, "name")
+	_user.Age = field.NewInt64(tableName, "age")
+	_user.Birthday = field.NewTime(tableName, "birthday")
+	_user.Area = field.NewString(tableName, "area")
+	_user.CompanyID = field.NewInt64(tableName, "company_id")
+	_user.ManagerID = field.NewInt64(tableName, "manager_id")
+	_user.Active = field.NewBool(tableName, "active")
+
+	_user.fillFieldMap()
+
+	return _user
+}
+
+type user struct {
+	userDo userDo
+
+	ALL       field.Asterisk
+	ID        field.Int64
+	CreatedAt field.Time
+	UpdatedAt field.Time
+	DeletedAt field.Field
+	Name      field.String
+	Age       field.Int64
+	Birthday  field.Time
+	Area      field.String // 数据地址
+	CompanyID field.Int64
+	ManagerID field.Int64
+	Active    field.Bool
+
+	fieldMap map[string]field.Expr
+}
+
+func (u user) Table(newTableName string) *user {
+	u.userDo.UseTable(newTableName)
+	return u.updateTableName(newTableName)
+}
+
+func (u user) As(alias string) *user {
+	u.userDo.DO = *(u.userDo.As(alias).(*gen.DO))
+	return u.updateTableName(alias)
+}
+
+func (u *user) updateTableName(table string) *user {
+	u.ALL = field.NewAsterisk(table)
+	u.ID = field.NewInt64(table, "id")
+	u.CreatedAt = field.NewTime(table, "created_at")
+	u.UpdatedAt = field.NewTime(table, "updated_at")
+	u.DeletedAt = field.NewField(table, "deleted_at")
+	u.Name = field.NewString(table, "name")
+	u.Age = field.NewInt64(table, "age")
+	u.Birthday = field.NewTime(table, "birthday")
+	u.Area = field.NewString(table, "area")
+	u.CompanyID = field.NewInt64(table, "company_id")
+	u.ManagerID = field.NewInt64(table, "manager_id")
+	u.Active = field.NewBool(table, "active")
+
+	u.fillFieldMap()
+
+	return u
+}
+
+func (u *user) WithContext(ctx context.Context) *userDo { return u.userDo.WithContext(ctx) }
+
+func (u user) TableName() string { return u.userDo.TableName() }
+
+func (u user) Alias() string { return u.userDo.Alias() }
+
+func (u user) Columns(cols ...field.Expr) gen.Columns { return u.userDo.Columns(cols...) }
+
+func (u *user) GetFieldByName(fieldName string) (field.OrderExpr, bool) {
+	_f, ok := u.fieldMap[fieldName]
+	if !ok || _f == nil {
+		return nil, false
+	}
+	_oe, ok := _f.(field.OrderExpr)
+	return _oe, ok
+}
+
+func (u *user) fillFieldMap() {
+	u.fieldMap = make(map[string]field.Expr, 11)
+	u.fieldMap["id"] = u.ID
+	u.fieldMap["created_at"] = u.CreatedAt
+	u.fieldMap["updated_at"] = u.UpdatedAt
+	u.fieldMap["deleted_at"] = u.DeletedAt
+	u.fieldMap["name"] = u.Name
+	u.fieldMap["age"] = u.Age
+	u.fieldMap["birthday"] = u.Birthday
+	u.fieldMap["area"] = u.Area
+	u.fieldMap["company_id"] = u.CompanyID
+	u.fieldMap["manager_id"] = u.ManagerID
+	u.fieldMap["active"] = u.Active
+}
+
+func (u user) clone(db *gorm.DB) user {
+	u.userDo.ReplaceConnPool(db.Statement.ConnPool)
+	return u
+}
+
+func (u user) replaceDB(db *gorm.DB) user {
+	u.userDo.ReplaceDB(db)
+	return u
+}
+
+type userDo struct{ gen.DO }
+
+func (u userDo) Debug() *userDo {
+	return u.withDO(u.DO.Debug())
+}
+
+func (u userDo) WithContext(ctx context.Context) *userDo {
+	return u.withDO(u.DO.WithContext(ctx))
+}
+
+func (u userDo) ReadDB() *userDo {
+	return u.Clauses(dbresolver.Read)
+}
+
+func (u userDo) WriteDB() *userDo {
+	return u.Clauses(dbresolver.Write)
+}
+
+func (u userDo) Session(config *gorm.Session) *userDo {
+	return u.withDO(u.DO.Session(config))
+}
+
+func (u userDo) Clauses(conds ...clause.Expression) *userDo {
+	return u.withDO(u.DO.Clauses(conds...))
+}
+
+func (u userDo) Returning(value interface{}, columns ...string) *userDo {
+	return u.withDO(u.DO.Returning(value, columns...))
+}
+
+func (u userDo) Not(conds ...gen.Condition) *userDo {
+	return u.withDO(u.DO.Not(conds...))
+}
+
+func (u userDo) Or(conds ...gen.Condition) *userDo {
+	return u.withDO(u.DO.Or(conds...))
+}
+
+func (u userDo) Select(conds ...field.Expr) *userDo {
+	return u.withDO(u.DO.Select(conds...))
+}
+
+func (u userDo) Where(conds ...gen.Condition) *userDo {
+	return u.withDO(u.DO.Where(conds...))
+}
+
+func (u userDo) Order(conds ...field.Expr) *userDo {
+	return u.withDO(u.DO.Order(conds...))
+}
+
+func (u userDo) Distinct(cols ...field.Expr) *userDo {
+	return u.withDO(u.DO.Distinct(cols...))
+}
+
+func (u userDo) Omit(cols ...field.Expr) *userDo {
+	return u.withDO(u.DO.Omit(cols...))
+}
+
+func (u userDo) Join(table schema.Tabler, on ...field.Expr) *userDo {
+	return u.withDO(u.DO.Join(table, on...))
+}
+
+func (u userDo) LeftJoin(table schema.Tabler, on ...field.Expr) *userDo {
+	return u.withDO(u.DO.LeftJoin(table, on...))
+}
+
+func (u userDo) RightJoin(table schema.Tabler, on ...field.Expr) *userDo {
+	return u.withDO(u.DO.RightJoin(table, on...))
+}
+
+func (u userDo) Group(cols ...field.Expr) *userDo {
+	return u.withDO(u.DO.Group(cols...))
+}
+
+func (u userDo) Having(conds ...gen.Condition) *userDo {
+	return u.withDO(u.DO.Having(conds...))
+}
+
+func (u userDo) Limit(limit int) *userDo {
+	return u.withDO(u.DO.Limit(limit))
+}
+
+func (u userDo) Offset(offset int) *userDo {
+	return u.withDO(u.DO.Offset(offset))
+}
+
+func (u userDo) Scopes(funcs ...func(gen.Dao) gen.Dao) *userDo {
+	return u.withDO(u.DO.Scopes(funcs...))
+}
+
+func (u userDo) Unscoped() *userDo {
+	return u.withDO(u.DO.Unscoped())
+}
+
+func (u userDo) Create(values ...*model.User) error {
+	if len(values) == 0 {
+		return nil
+	}
+	return u.DO.Create(values)
+}
+
+func (u userDo) CreateInBatches(values []*model.User, batchSize int) error {
+	return u.DO.CreateInBatches(values, batchSize)
+}
+
+// Save : !!! underlying implementation is different with GORM
+// The method is equivalent to executing the statement: db.Clauses(clause.OnConflict{UpdateAll: true}).Create(values)
+func (u userDo) Save(values ...*model.User) error {
+	if len(values) == 0 {
+		return nil
+	}
+	return u.DO.Save(values)
+}
+
+func (u userDo) First() (*model.User, error) {
+	if result, err := u.DO.First(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.User), nil
+	}
+}
+
+func (u userDo) Take() (*model.User, error) {
+	if result, err := u.DO.Take(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.User), nil
+	}
+}
+
+func (u userDo) Last() (*model.User, error) {
+	if result, err := u.DO.Last(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.User), nil
+	}
+}
+
+func (u userDo) Find() ([]*model.User, error) {
+	result, err := u.DO.Find()
+	return result.([]*model.User), err
+}
+
+func (u userDo) FindInBatch(batchSize int, fc func(tx gen.Dao, batch int) error) (results []*model.User, err error) {
+	buf := make([]*model.User, 0, batchSize)
+	err = u.DO.FindInBatches(&buf, batchSize, func(tx gen.Dao, batch int) error {
+		defer func() { results = append(results, buf...) }()
+		return fc(tx, batch)
+	})
+	return results, err
+}
+
+func (u userDo) FindInBatches(result *[]*model.User, batchSize int, fc func(tx gen.Dao, batch int) error) error {
+	return u.DO.FindInBatches(result, batchSize, fc)
+}
+
+func (u userDo) Attrs(attrs ...field.AssignExpr) *userDo {
+	return u.withDO(u.DO.Attrs(attrs...))
+}
+
+func (u userDo) Assign(attrs ...field.AssignExpr) *userDo {
+	return u.withDO(u.DO.Assign(attrs...))
+}
+
+func (u userDo) Joins(fields ...field.RelationField) *userDo {
+	for _, _f := range fields {
+		u = *u.withDO(u.DO.Joins(_f))
+	}
+	return &u
+}
+
+func (u userDo) Preload(fields ...field.RelationField) *userDo {
+	for _, _f := range fields {
+		u = *u.withDO(u.DO.Preload(_f))
+	}
+	return &u
+}
+
+func (u userDo) FirstOrInit() (*model.User, error) {
+	if result, err := u.DO.FirstOrInit(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.User), nil
+	}
+}
+
+func (u userDo) FirstOrCreate() (*model.User, error) {
+	if result, err := u.DO.FirstOrCreate(); err != nil {
+		return nil, err
+	} else {
+		return result.(*model.User), nil
+	}
+}
+
+func (u userDo) FindByPage(offset int, limit int) (result []*model.User, count int64, err error) {
+	result, err = u.Offset(offset).Limit(limit).Find()
+	if err != nil {
+		return
+	}
+
+	if size := len(result); 0 < limit && 0 < size && size < limit {
+		count = int64(size + offset)
+		return
+	}
+
+	count, err = u.Offset(-1).Limit(-1).Count()
+	return
+}
+
+func (u userDo) ScanByPage(result interface{}, offset int, limit int) (count int64, err error) {
+	count, err = u.Count()
+	if err != nil {
+		return
+	}
+
+	err = u.Offset(offset).Limit(limit).Scan(result)
+	return
+}
+
+func (u userDo) Scan(result interface{}) (err error) {
+	return u.DO.Scan(result)
+}
+
+func (u userDo) Delete(models ...*model.User) (result gen.ResultInfo, err error) {
+	return u.DO.Delete(models)
+}
+
+func (u *userDo) withDO(do gen.Dao) *userDo {
+	u.DO = *do.(*gen.DO)
+	return u
+}
diff --git a/dal/query/users.gen_test.go b/dal/query/users.gen_test.go
new file mode 100644
index 00000000..a1e686a7
--- /dev/null
+++ b/dal/query/users.gen_test.go
@@ -0,0 +1,145 @@
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+// Code generated by gorm.io/gen. DO NOT EDIT.
+
+package query
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	"gorm.io/gen"
+	"gorm.io/gen/field"
+	"gorm.io/gorm/clause"
+	"gorm.io/playground/dal/model"
+)
+
+func init() {
+	InitializeDB()
+	err := _gen_test_db.AutoMigrate(&model.User{})
+	if err != nil {
+		fmt.Printf("Error: AutoMigrate(&model.User{}) fail: %s", err)
+	}
+}
+
+func Test_userQuery(t *testing.T) {
+	user := newUser(_gen_test_db)
+	user = *user.As(user.TableName())
+	_do := user.WithContext(context.Background()).Debug()
+
+	primaryKey := field.NewString(user.TableName(), clause.PrimaryKey)
+	_, err := _do.Unscoped().Where(primaryKey.IsNotNull()).Delete()
+	if err != nil {
+		t.Error("clean table <users> fail:", err)
+		return
+	}
+
+	_, ok := user.GetFieldByName("")
+	if ok {
+		t.Error("GetFieldByName(\"\") from user success")
+	}
+
+	err = _do.Create(&model.User{})
+	if err != nil {
+		t.Error("create item in table <users> fail:", err)
+	}
+
+	err = _do.Save(&model.User{})
+	if err != nil {
+		t.Error("create item in table <users> fail:", err)
+	}
+
+	err = _do.CreateInBatches([]*model.User{{}, {}}, 10)
+	if err != nil {
+		t.Error("create item in table <users> fail:", err)
+	}
+
+	_, err = _do.Select(user.ALL).Take()
+	if err != nil {
+		t.Error("Take() on table <users> fail:", err)
+	}
+
+	_, err = _do.First()
+	if err != nil {
+		t.Error("First() on table <users> fail:", err)
+	}
+
+	_, err = _do.Last()
+	if err != nil {
+		t.Error("First() on table <users> fail:", err)
+	}
+
+	_, err = _do.Where(primaryKey.IsNotNull()).FindInBatch(10, func(tx gen.Dao, batch int) error { return nil })
+	if err != nil {
+		t.Error("FindInBatch() on table <users> fail:", err)
+	}
+
+	err = _do.Where(primaryKey.IsNotNull()).FindInBatches(&[]*model.User{}, 10, func(tx gen.Dao, batch int) error { return nil })
+	if err != nil {
+		t.Error("FindInBatches() on table <users> fail:", err)
+	}
+
+	_, err = _do.Select(user.ALL).Where(primaryKey.IsNotNull()).Order(primaryKey.Desc()).Find()
+	if err != nil {
+		t.Error("Find() on table <users> fail:", err)
+	}
+
+	_, err = _do.Distinct(primaryKey).Take()
+	if err != nil {
+		t.Error("select Distinct() on table <users> fail:", err)
+	}
+
+	_, err = _do.Select(user.ALL).Omit(primaryKey).Take()
+	if err != nil {
+		t.Error("Omit() on table <users> fail:", err)
+	}
+
+	_, err = _do.Group(primaryKey).Find()
+	if err != nil {
+		t.Error("Group() on table <users> fail:", err)
+	}
+
+	_, err = _do.Scopes(func(dao gen.Dao) gen.Dao { return dao.Where(primaryKey.IsNotNull()) }).Find()
+	if err != nil {
+		t.Error("Scopes() on table <users> fail:", err)
+	}
+
+	_, _, err = _do.FindByPage(0, 1)
+	if err != nil {
+		t.Error("FindByPage() on table <users> fail:", err)
+	}
+
+	_, err = _do.ScanByPage(&model.User{}, 0, 1)
+	if err != nil {
+		t.Error("ScanByPage() on table <users> fail:", err)
+	}
+
+	_, err = _do.Attrs(primaryKey).Assign(primaryKey).FirstOrInit()
+	if err != nil {
+		t.Error("FirstOrInit() on table <users> fail:", err)
+	}
+
+	_, err = _do.Attrs(primaryKey).Assign(primaryKey).FirstOrCreate()
+	if err != nil {
+		t.Error("FirstOrCreate() on table <users> fail:", err)
+	}
+
+	var _a _another
+	var _aPK = field.NewString(_a.TableName(), "id")
+
+	err = _do.Join(&_a, primaryKey.EqCol(_aPK)).Scan(map[string]interface{}{})
+	if err != nil {
+		t.Error("Join() on table <users> fail:", err)
+	}
+
+	err = _do.LeftJoin(&_a, primaryKey.EqCol(_aPK)).Scan(map[string]interface{}{})
+	if err != nil {
+		t.Error("LeftJoin() on table <users> fail:", err)
+	}
+
+	_, err = _do.Not().Or().Clauses().Take()
+	if err != nil {
+		t.Error("Not/Or/Clauses on table <users> fail:", err)
+	}
+}
diff --git a/db.go b/db.go
index ccab03ed..9c7fea9d 100644
--- a/db.go
+++ b/db.go
@@ -43,7 +43,8 @@ func init() {
 
 func OpenTestConnection() (db *gorm.DB, err error) {
 	dbDSN := os.Getenv("GORM_DSN")
-	switch os.Getenv("GORM_DIALECT") {
+	dialect := os.Getenv("GORM_DIALECT")
+	switch dialect {
 	case "mysql":
 		log.Println("testing mysql...")
 		if dbDSN == "" {
diff --git a/gen.go b/gen.go
index c0f87398..2709a8de 100644
--- a/gen.go
+++ b/gen.go
@@ -12,10 +12,10 @@ func generate() {
 
 		WithUnitTest: true,
 	})
-	// g.UseDB(dal.DB)
+	g.UseDB(DB)
 
 	// g.ApplyBasic(Company{}, Language{}) // Associations
-	g.ApplyBasic(g.GenerateModel("user"), g.GenerateModelAs("account", "AccountInfo"))
+	g.ApplyBasic(g.GenerateModel("users"), g.GenerateModelAs("accounts", "AccountInfo"))
 
 	g.Execute()
 }
diff --git a/go.mod b/go.mod
index f194634f..f833a456 100644
--- a/go.mod
+++ b/go.mod
@@ -30,7 +30,6 @@ require (
 	golang.org/x/crypto v0.29.0 // indirect
 	golang.org/x/mod v0.22.0 // indirect
 	golang.org/x/sync v0.9.0 // indirect
-	golang.org/x/sys v0.27.0 // indirect
 	golang.org/x/text v0.20.0 // indirect
 	golang.org/x/tools v0.27.0 // indirect
 	gorm.io/datatypes v1.2.4 // indirect
@@ -38,4 +37,4 @@ require (
 	gorm.io/plugin/dbresolver v1.5.3 // indirect
 )
 
-replace gorm.io/gorm => ./gorm
+//replace gorm.io/gorm => ./gorm
diff --git a/main_test.go b/main_test.go
index 60a388f7..868fd82f 100644
--- a/main_test.go
+++ b/main_test.go
@@ -1,6 +1,11 @@
 package main
 
 import (
+	"context"
+	"fmt"
+	"gorm.io/datatypes"
+	"gorm.io/gen"
+	"gorm.io/playground/dal/query"
 	"testing"
 )
 
@@ -18,3 +23,16 @@ func TestGORM(t *testing.T) {
 		t.Errorf("Failed, got error: %v", err)
 	}
 }
+func TestGen(t *testing.T) {
+	RunMigrations()
+	generate()
+	query.SetDefault(DB)
+	list, err := query.User.WithContext(context.Background()).Where(gen.Cond(datatypes.JSONArrayQuery("area").Contains([]int{1, 2, 3}))...).Find()
+	if err != nil {
+		// SELECT * FROM `users` WHERE JSON_CONTAINS(`area`,JSON_ARRAY((1,2,3))) AND `users`.`deleted_at` IS NULL
+		// Error 1241 (21000): Operand should contain 1 column(s)
+		t.Errorf("Failed, got error: %v", err)
+	} else {
+		fmt.Printf("%#v\n", len(list))
+	}
+}
diff --git a/models.go b/models.go
index 692a6842..be75c982 100644
--- a/models.go
+++ b/models.go
@@ -19,6 +19,7 @@ type User struct {
 	Account   Account
 	Pets      []*Pet
 	Toys      []Toy `gorm:"polymorphic:Owner"`
+	Area      []int `gorm:"column:area;type:json;not null;comment:数据地址" json:"area"`
 	CompanyID *int
 	Company   Company
 	ManagerID *uint