platform/web/queries/bill.gen.go

// 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 queries

import (
	"context"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"

	"gorm.io/gen"
	"gorm.io/gen/field"

	"gorm.io/plugin/dbresolver"

	"platform/web/models"
)

func newBill(db *gorm.DB, opts ...gen.DOOption) bill {
	_bill := bill{}

	_bill.billDo.UseDB(db, opts...)
	_bill.billDo.UseModel(&models.Bill{})

	tableName := _bill.billDo.TableName()
	_bill.ALL = field.NewAsterisk(tableName)
	_bill.ID = field.NewInt32(tableName, "id")
	_bill.CreatedAt = field.NewTime(tableName, "created_at")
	_bill.UpdatedAt = field.NewTime(tableName, "updated_at")
	_bill.DeletedAt = field.NewField(tableName, "deleted_at")
	_bill.UserID = field.NewInt32(tableName, "user_id")
	_bill.TradeID = field.NewInt32(tableName, "trade_id")
	_bill.ResourceID = field.NewInt32(tableName, "resource_id")
	_bill.RefundID = field.NewInt32(tableName, "refund_id")
	_bill.CouponID = field.NewInt32(tableName, "coupon_id")
	_bill.BillNo = field.NewString(tableName, "bill_no")
	_bill.Info = field.NewString(tableName, "info")
	_bill.Type = field.NewInt(tableName, "type")
	_bill.Amount = field.NewField(tableName, "amount")
	_bill.Actual = field.NewField(tableName, "actual")
	_bill.User = billBelongsToUser{
		db: db.Session(&gorm.Session{}),

		RelationField: field.NewRelation("User", "models.User"),
		Admin: struct {
			field.RelationField
			Roles struct {
				field.RelationField
				Permissions struct {
					field.RelationField
					Parent struct {
						field.RelationField
					}
					Children struct {
						field.RelationField
					}
				}
			}
		}{
			RelationField: field.NewRelation("User.Admin", "models.Admin"),
			Roles: struct {
				field.RelationField
				Permissions struct {
					field.RelationField
					Parent struct {
						field.RelationField
					}
					Children struct {
						field.RelationField
					}
				}
			}{
				RelationField: field.NewRelation("User.Admin.Roles", "models.AdminRole"),
				Permissions: struct {
					field.RelationField
					Parent struct {
						field.RelationField
					}
					Children struct {
						field.RelationField
					}
				}{
					RelationField: field.NewRelation("User.Admin.Roles.Permissions", "models.Permission"),
					Parent: struct {
						field.RelationField
					}{
						RelationField: field.NewRelation("User.Admin.Roles.Permissions.Parent", "models.Permission"),
					},
					Children: struct {
						field.RelationField
					}{
						RelationField: field.NewRelation("User.Admin.Roles.Permissions.Children", "models.Permission"),
					},
				},
			},
		},
		Discount: struct {
			field.RelationField
		}{
			RelationField: field.NewRelation("User.Discount", "models.ProductDiscount"),
		},
		Roles: struct {
			field.RelationField
			Permissions struct {
				field.RelationField
			}
		}{
			RelationField: field.NewRelation("User.Roles", "models.UserRole"),
			Permissions: struct {
				field.RelationField
			}{
				RelationField: field.NewRelation("User.Roles.Permissions", "models.Permission"),
			},
		},
	}

	_bill.Trade = billBelongsToTrade{
		db: db.Session(&gorm.Session{}),

		RelationField: field.NewRelation("Trade", "models.Trade"),
		User: struct {
			field.RelationField
		}{
			RelationField: field.NewRelation("Trade.User", "models.User"),
		},
	}

	_bill.Resource = billBelongsToResource{
		db: db.Session(&gorm.Session{}),

		RelationField: field.NewRelation("Resource", "models.Resource"),
		User: struct {
			field.RelationField
		}{
			RelationField: field.NewRelation("Resource.User", "models.User"),
		},
		Short: struct {
			field.RelationField
			Sku struct {
				field.RelationField
				Product struct {
					field.RelationField
				}
				Discount struct {
					field.RelationField
				}
			}
		}{
			RelationField: field.NewRelation("Resource.Short", "models.ResourceShort"),
			Sku: struct {
				field.RelationField
				Product struct {
					field.RelationField
				}
				Discount struct {
					field.RelationField
				}
			}{
				RelationField: field.NewRelation("Resource.Short.Sku", "models.ProductSku"),
				Product: struct {
					field.RelationField
				}{
					RelationField: field.NewRelation("Resource.Short.Sku.Product", "models.Product"),
				},
				Discount: struct {
					field.RelationField
				}{
					RelationField: field.NewRelation("Resource.Short.Sku.Discount", "models.ProductDiscount"),
				},
			},
		},
		Long: struct {
			field.RelationField
			Sku struct {
				field.RelationField
			}
		}{
			RelationField: field.NewRelation("Resource.Long", "models.ResourceLong"),
			Sku: struct {
				field.RelationField
			}{
				RelationField: field.NewRelation("Resource.Long.Sku", "models.ProductSku"),
			},
		},
		Product: struct {
			field.RelationField
		}{
			RelationField: field.NewRelation("Resource.Product", "models.Product"),
		},
	}

	_bill.Refund = billBelongsToRefund{
		db: db.Session(&gorm.Session{}),

		RelationField: field.NewRelation("Refund", "models.Refund"),
	}

	_bill.fillFieldMap()

	return _bill
}

type bill struct {
	billDo

	ALL        field.Asterisk
	ID         field.Int32
	CreatedAt  field.Time
	UpdatedAt  field.Time
	DeletedAt  field.Field
	UserID     field.Int32
	TradeID    field.Int32
	ResourceID field.Int32
	RefundID   field.Int32
	CouponID   field.Int32
	BillNo     field.String
	Info       field.String
	Type       field.Int
	Amount     field.Field
	Actual     field.Field
	User       billBelongsToUser

	Trade billBelongsToTrade

	Resource billBelongsToResource

	Refund billBelongsToRefund

	fieldMap map[string]field.Expr
}

func (b bill) Table(newTableName string) *bill {
	b.billDo.UseTable(newTableName)
	return b.updateTableName(newTableName)
}

func (b bill) As(alias string) *bill {
	b.billDo.DO = *(b.billDo.As(alias).(*gen.DO))
	return b.updateTableName(alias)
}

func (b *bill) updateTableName(table string) *bill {
	b.ALL = field.NewAsterisk(table)
	b.ID = field.NewInt32(table, "id")
	b.CreatedAt = field.NewTime(table, "created_at")
	b.UpdatedAt = field.NewTime(table, "updated_at")
	b.DeletedAt = field.NewField(table, "deleted_at")
	b.UserID = field.NewInt32(table, "user_id")
	b.TradeID = field.NewInt32(table, "trade_id")
	b.ResourceID = field.NewInt32(table, "resource_id")
	b.RefundID = field.NewInt32(table, "refund_id")
	b.CouponID = field.NewInt32(table, "coupon_id")
	b.BillNo = field.NewString(table, "bill_no")
	b.Info = field.NewString(table, "info")
	b.Type = field.NewInt(table, "type")
	b.Amount = field.NewField(table, "amount")
	b.Actual = field.NewField(table, "actual")

	b.fillFieldMap()

	return b
}

func (b *bill) GetFieldByName(fieldName string) (field.OrderExpr, bool) {
	_f, ok := b.fieldMap[fieldName]
	if !ok || _f == nil {
		return nil, false
	}
	_oe, ok := _f.(field.OrderExpr)
	return _oe, ok
}

func (b *bill) fillFieldMap() {
	b.fieldMap = make(map[string]field.Expr, 18)
	b.fieldMap["id"] = b.ID
	b.fieldMap["created_at"] = b.CreatedAt
	b.fieldMap["updated_at"] = b.UpdatedAt
	b.fieldMap["deleted_at"] = b.DeletedAt
	b.fieldMap["user_id"] = b.UserID
	b.fieldMap["trade_id"] = b.TradeID
	b.fieldMap["resource_id"] = b.ResourceID
	b.fieldMap["refund_id"] = b.RefundID
	b.fieldMap["coupon_id"] = b.CouponID
	b.fieldMap["bill_no"] = b.BillNo
	b.fieldMap["info"] = b.Info
	b.fieldMap["type"] = b.Type
	b.fieldMap["amount"] = b.Amount
	b.fieldMap["actual"] = b.Actual

}

func (b bill) clone(db *gorm.DB) bill {
	b.billDo.ReplaceConnPool(db.Statement.ConnPool)
	b.User.db = db.Session(&gorm.Session{Initialized: true})
	b.User.db.Statement.ConnPool = db.Statement.ConnPool
	b.Trade.db = db.Session(&gorm.Session{Initialized: true})
	b.Trade.db.Statement.ConnPool = db.Statement.ConnPool
	b.Resource.db = db.Session(&gorm.Session{Initialized: true})
	b.Resource.db.Statement.ConnPool = db.Statement.ConnPool
	b.Refund.db = db.Session(&gorm.Session{Initialized: true})
	b.Refund.db.Statement.ConnPool = db.Statement.ConnPool
	return b
}

func (b bill) replaceDB(db *gorm.DB) bill {
	b.billDo.ReplaceDB(db)
	b.User.db = db.Session(&gorm.Session{})
	b.Trade.db = db.Session(&gorm.Session{})
	b.Resource.db = db.Session(&gorm.Session{})
	b.Refund.db = db.Session(&gorm.Session{})
	return b
}

type billBelongsToUser struct {
	db *gorm.DB

	field.RelationField

	Admin struct {
		field.RelationField
		Roles struct {
			field.RelationField
			Permissions struct {
				field.RelationField
				Parent struct {
					field.RelationField
				}
				Children struct {
					field.RelationField
				}
			}
		}
	}
	Discount struct {
		field.RelationField
	}
	Roles struct {
		field.RelationField
		Permissions struct {
			field.RelationField
		}
	}
}

func (a billBelongsToUser) Where(conds ...field.Expr) *billBelongsToUser {
	if len(conds) == 0 {
		return &a
	}

	exprs := make([]clause.Expression, 0, len(conds))
	for _, cond := range conds {
		exprs = append(exprs, cond.BeCond().(clause.Expression))
	}
	a.db = a.db.Clauses(clause.Where{Exprs: exprs})
	return &a
}

func (a billBelongsToUser) WithContext(ctx context.Context) *billBelongsToUser {
	a.db = a.db.WithContext(ctx)
	return &a
}

func (a billBelongsToUser) Session(session *gorm.Session) *billBelongsToUser {
	a.db = a.db.Session(session)
	return &a
}

func (a billBelongsToUser) Model(m *models.Bill) *billBelongsToUserTx {
	return &billBelongsToUserTx{a.db.Model(m).Association(a.Name())}
}

func (a billBelongsToUser) Unscoped() *billBelongsToUser {
	a.db = a.db.Unscoped()
	return &a
}

type billBelongsToUserTx struct{ tx *gorm.Association }

func (a billBelongsToUserTx) Find() (result *models.User, err error) {
	return result, a.tx.Find(&result)
}

func (a billBelongsToUserTx) Append(values ...*models.User) (err error) {
	targetValues := make([]interface{}, len(values))
	for i, v := range values {
		targetValues[i] = v
	}
	return a.tx.Append(targetValues...)
}

func (a billBelongsToUserTx) Replace(values ...*models.User) (err error) {
	targetValues := make([]interface{}, len(values))
	for i, v := range values {
		targetValues[i] = v
	}
	return a.tx.Replace(targetValues...)
}

func (a billBelongsToUserTx) Delete(values ...*models.User) (err error) {
	targetValues := make([]interface{}, len(values))
	for i, v := range values {
		targetValues[i] = v
	}
	return a.tx.Delete(targetValues...)
}

func (a billBelongsToUserTx) Clear() error {
	return a.tx.Clear()
}

func (a billBelongsToUserTx) Count() int64 {
	return a.tx.Count()
}

func (a billBelongsToUserTx) Unscoped() *billBelongsToUserTx {
	a.tx = a.tx.Unscoped()
	return &a
}

type billBelongsToTrade struct {
	db *gorm.DB

	field.RelationField

	User struct {
		field.RelationField
	}
}

func (a billBelongsToTrade) Where(conds ...field.Expr) *billBelongsToTrade {
	if len(conds) == 0 {
		return &a
	}

	exprs := make([]clause.Expression, 0, len(conds))
	for _, cond := range conds {
		exprs = append(exprs, cond.BeCond().(clause.Expression))
	}
	a.db = a.db.Clauses(clause.Where{Exprs: exprs})
	return &a
}

func (a billBelongsToTrade) WithContext(ctx context.Context) *billBelongsToTrade {
	a.db = a.db.WithContext(ctx)
	return &a
}

func (a billBelongsToTrade) Session(session *gorm.Session) *billBelongsToTrade {
	a.db = a.db.Session(session)
	return &a
}

func (a billBelongsToTrade) Model(m *models.Bill) *billBelongsToTradeTx {
	return &billBelongsToTradeTx{a.db.Model(m).Association(a.Name())}
}

func (a billBelongsToTrade) Unscoped() *billBelongsToTrade {
	a.db = a.db.Unscoped()
	return &a
}

type billBelongsToTradeTx struct{ tx *gorm.Association }

func (a billBelongsToTradeTx) Find() (result *models.Trade, err error) {
	return result, a.tx.Find(&result)
}

func (a billBelongsToTradeTx) Append(values ...*models.Trade) (err error) {
	targetValues := make([]interface{}, len(values))
	for i, v := range values {
		targetValues[i] = v
	}
	return a.tx.Append(targetValues...)
}

func (a billBelongsToTradeTx) Replace(values ...*models.Trade) (err error) {
	targetValues := make([]interface{}, len(values))
	for i, v := range values {
		targetValues[i] = v
	}
	return a.tx.Replace(targetValues...)
}

func (a billBelongsToTradeTx) Delete(values ...*models.Trade) (err error) {
	targetValues := make([]interface{}, len(values))
	for i, v := range values {
		targetValues[i] = v
	}
	return a.tx.Delete(targetValues...)
}

func (a billBelongsToTradeTx) Clear() error {
	return a.tx.Clear()
}

func (a billBelongsToTradeTx) Count() int64 {
	return a.tx.Count()
}

func (a billBelongsToTradeTx) Unscoped() *billBelongsToTradeTx {
	a.tx = a.tx.Unscoped()
	return &a
}

type billBelongsToResource struct {
	db *gorm.DB

	field.RelationField

	User struct {
		field.RelationField
	}
	Short struct {
		field.RelationField
		Sku struct {
			field.RelationField
			Product struct {
				field.RelationField
			}
			Discount struct {
				field.RelationField
			}
		}
	}
	Long struct {
		field.RelationField
		Sku struct {
			field.RelationField
		}
	}
	Product struct {
		field.RelationField
	}
}

func (a billBelongsToResource) Where(conds ...field.Expr) *billBelongsToResource {
	if len(conds) == 0 {
		return &a
	}

	exprs := make([]clause.Expression, 0, len(conds))
	for _, cond := range conds {
		exprs = append(exprs, cond.BeCond().(clause.Expression))
	}
	a.db = a.db.Clauses(clause.Where{Exprs: exprs})
	return &a
}

func (a billBelongsToResource) WithContext(ctx context.Context) *billBelongsToResource {
	a.db = a.db.WithContext(ctx)
	return &a
}

func (a billBelongsToResource) Session(session *gorm.Session) *billBelongsToResource {
	a.db = a.db.Session(session)
	return &a
}

func (a billBelongsToResource) Model(m *models.Bill) *billBelongsToResourceTx {
	return &billBelongsToResourceTx{a.db.Model(m).Association(a.Name())}
}

func (a billBelongsToResource) Unscoped() *billBelongsToResource {
	a.db = a.db.Unscoped()
	return &a
}

type billBelongsToResourceTx struct{ tx *gorm.Association }

func (a billBelongsToResourceTx) Find() (result *models.Resource, err error) {
	return result, a.tx.Find(&result)
}

func (a billBelongsToResourceTx) Append(values ...*models.Resource) (err error) {
	targetValues := make([]interface{}, len(values))
	for i, v := range values {
		targetValues[i] = v
	}
	return a.tx.Append(targetValues...)
}

func (a billBelongsToResourceTx) Replace(values ...*models.Resource) (err error) {
	targetValues := make([]interface{}, len(values))
	for i, v := range values {
		targetValues[i] = v
	}
	return a.tx.Replace(targetValues...)
}

func (a billBelongsToResourceTx) Delete(values ...*models.Resource) (err error) {
	targetValues := make([]interface{}, len(values))
	for i, v := range values {
		targetValues[i] = v
	}
	return a.tx.Delete(targetValues...)
}

func (a billBelongsToResourceTx) Clear() error {
	return a.tx.Clear()
}

func (a billBelongsToResourceTx) Count() int64 {
	return a.tx.Count()
}

func (a billBelongsToResourceTx) Unscoped() *billBelongsToResourceTx {
	a.tx = a.tx.Unscoped()
	return &a
}

type billBelongsToRefund struct {
	db *gorm.DB

	field.RelationField
}

func (a billBelongsToRefund) Where(conds ...field.Expr) *billBelongsToRefund {
	if len(conds) == 0 {
		return &a
	}

	exprs := make([]clause.Expression, 0, len(conds))
	for _, cond := range conds {
		exprs = append(exprs, cond.BeCond().(clause.Expression))
	}
	a.db = a.db.Clauses(clause.Where{Exprs: exprs})
	return &a
}

func (a billBelongsToRefund) WithContext(ctx context.Context) *billBelongsToRefund {
	a.db = a.db.WithContext(ctx)
	return &a
}

func (a billBelongsToRefund) Session(session *gorm.Session) *billBelongsToRefund {
	a.db = a.db.Session(session)
	return &a
}

func (a billBelongsToRefund) Model(m *models.Bill) *billBelongsToRefundTx {
	return &billBelongsToRefundTx{a.db.Model(m).Association(a.Name())}
}

func (a billBelongsToRefund) Unscoped() *billBelongsToRefund {
	a.db = a.db.Unscoped()
	return &a
}

type billBelongsToRefundTx struct{ tx *gorm.Association }

func (a billBelongsToRefundTx) Find() (result *models.Refund, err error) {
	return result, a.tx.Find(&result)
}

func (a billBelongsToRefundTx) Append(values ...*models.Refund) (err error) {
	targetValues := make([]interface{}, len(values))
	for i, v := range values {
		targetValues[i] = v
	}
	return a.tx.Append(targetValues...)
}

func (a billBelongsToRefundTx) Replace(values ...*models.Refund) (err error) {
	targetValues := make([]interface{}, len(values))
	for i, v := range values {
		targetValues[i] = v
	}
	return a.tx.Replace(targetValues...)
}

func (a billBelongsToRefundTx) Delete(values ...*models.Refund) (err error) {
	targetValues := make([]interface{}, len(values))
	for i, v := range values {
		targetValues[i] = v
	}
	return a.tx.Delete(targetValues...)
}

func (a billBelongsToRefundTx) Clear() error {
	return a.tx.Clear()
}

func (a billBelongsToRefundTx) Count() int64 {
	return a.tx.Count()
}

func (a billBelongsToRefundTx) Unscoped() *billBelongsToRefundTx {
	a.tx = a.tx.Unscoped()
	return &a
}

type billDo struct{ gen.DO }

func (b billDo) Debug() *billDo {
	return b.withDO(b.DO.Debug())
}

func (b billDo) WithContext(ctx context.Context) *billDo {
	return b.withDO(b.DO.WithContext(ctx))
}

func (b billDo) ReadDB() *billDo {
	return b.Clauses(dbresolver.Read)
}

func (b billDo) WriteDB() *billDo {
	return b.Clauses(dbresolver.Write)
}

func (b billDo) Session(config *gorm.Session) *billDo {
	return b.withDO(b.DO.Session(config))
}

func (b billDo) Clauses(conds ...clause.Expression) *billDo {
	return b.withDO(b.DO.Clauses(conds...))
}

func (b billDo) Returning(value interface{}, columns ...string) *billDo {
	return b.withDO(b.DO.Returning(value, columns...))
}

func (b billDo) Not(conds ...gen.Condition) *billDo {
	return b.withDO(b.DO.Not(conds...))
}

func (b billDo) Or(conds ...gen.Condition) *billDo {
	return b.withDO(b.DO.Or(conds...))
}

func (b billDo) Select(conds ...field.Expr) *billDo {
	return b.withDO(b.DO.Select(conds...))
}

func (b billDo) Where(conds ...gen.Condition) *billDo {
	return b.withDO(b.DO.Where(conds...))
}

func (b billDo) Order(conds ...field.Expr) *billDo {
	return b.withDO(b.DO.Order(conds...))
}

func (b billDo) Distinct(cols ...field.Expr) *billDo {
	return b.withDO(b.DO.Distinct(cols...))
}

func (b billDo) Omit(cols ...field.Expr) *billDo {
	return b.withDO(b.DO.Omit(cols...))
}

func (b billDo) Join(table schema.Tabler, on ...field.Expr) *billDo {
	return b.withDO(b.DO.Join(table, on...))
}

func (b billDo) LeftJoin(table schema.Tabler, on ...field.Expr) *billDo {
	return b.withDO(b.DO.LeftJoin(table, on...))
}

func (b billDo) RightJoin(table schema.Tabler, on ...field.Expr) *billDo {
	return b.withDO(b.DO.RightJoin(table, on...))
}

func (b billDo) Group(cols ...field.Expr) *billDo {
	return b.withDO(b.DO.Group(cols...))
}

func (b billDo) Having(conds ...gen.Condition) *billDo {
	return b.withDO(b.DO.Having(conds...))
}

func (b billDo) Limit(limit int) *billDo {
	return b.withDO(b.DO.Limit(limit))
}

func (b billDo) Offset(offset int) *billDo {
	return b.withDO(b.DO.Offset(offset))
}

func (b billDo) Scopes(funcs ...func(gen.Dao) gen.Dao) *billDo {
	return b.withDO(b.DO.Scopes(funcs...))
}

func (b billDo) Unscoped() *billDo {
	return b.withDO(b.DO.Unscoped())
}

func (b billDo) Create(values ...*models.Bill) error {
	if len(values) == 0 {
		return nil
	}
	return b.DO.Create(values)
}

func (b billDo) CreateInBatches(values []*models.Bill, batchSize int) error {
	return b.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 (b billDo) Save(values ...*models.Bill) error {
	if len(values) == 0 {
		return nil
	}
	return b.DO.Save(values)
}

func (b billDo) First() (*models.Bill, error) {
	if result, err := b.DO.First(); err != nil {
		return nil, err
	} else {
		return result.(*models.Bill), nil
	}
}

func (b billDo) Take() (*models.Bill, error) {
	if result, err := b.DO.Take(); err != nil {
		return nil, err
	} else {
		return result.(*models.Bill), nil
	}
}

func (b billDo) Last() (*models.Bill, error) {
	if result, err := b.DO.Last(); err != nil {
		return nil, err
	} else {
		return result.(*models.Bill), nil
	}
}

func (b billDo) Find() ([]*models.Bill, error) {
	result, err := b.DO.Find()
	return result.([]*models.Bill), err
}

func (b billDo) FindInBatch(batchSize int, fc func(tx gen.Dao, batch int) error) (results []*models.Bill, err error) {
	buf := make([]*models.Bill, 0, batchSize)
	err = b.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 (b billDo) FindInBatches(result *[]*models.Bill, batchSize int, fc func(tx gen.Dao, batch int) error) error {
	return b.DO.FindInBatches(result, batchSize, fc)
}

func (b billDo) Attrs(attrs ...field.AssignExpr) *billDo {
	return b.withDO(b.DO.Attrs(attrs...))
}

func (b billDo) Assign(attrs ...field.AssignExpr) *billDo {
	return b.withDO(b.DO.Assign(attrs...))
}

func (b billDo) Joins(fields ...field.RelationField) *billDo {
	for _, _f := range fields {
		b = *b.withDO(b.DO.Joins(_f))
	}
	return &b
}

func (b billDo) Preload(fields ...field.RelationField) *billDo {
	for _, _f := range fields {
		b = *b.withDO(b.DO.Preload(_f))
	}
	return &b
}

func (b billDo) FirstOrInit() (*models.Bill, error) {
	if result, err := b.DO.FirstOrInit(); err != nil {
		return nil, err
	} else {
		return result.(*models.Bill), nil
	}
}

func (b billDo) FirstOrCreate() (*models.Bill, error) {
	if result, err := b.DO.FirstOrCreate(); err != nil {
		return nil, err
	} else {
		return result.(*models.Bill), nil
	}
}

func (b billDo) FindByPage(offset int, limit int) (result []*models.Bill, count int64, err error) {
	result, err = b.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 = b.Offset(-1).Limit(-1).Count()
	return
}

func (b billDo) ScanByPage(result interface{}, offset int, limit int) (count int64, err error) {
	count, err = b.Count()
	if err != nil {
		return
	}

	err = b.Offset(offset).Limit(limit).Scan(result)
	return
}

func (b billDo) Scan(result interface{}) (err error) {
	return b.DO.Scan(result)
}

func (b billDo) Delete(models ...*models.Bill) (result gen.ResultInfo, err error) {
	return b.DO.Delete(models)
}

func (b *billDo) withDO(do gen.Dao) *billDo {
	b.DO = *do.(*gen.DO)
	return b
}