udeServer/internal/model/tservicemodel.go

package model

import (
	"context"
	"fmt"

	"github.com/zeromicro/go-zero/core/stores/sqlx"
)

var _ TServiceModel = (*customTServiceModel)(nil)

type (
	// TServiceModel is an interface to be customized, add more methods here,
	// and implement the added methods in customTServiceModel.
	TServiceModel interface {
		tServiceModel
		FindPage(ctx context.Context, page, pageSize int64) ([]TService, int64, error)
		withSession(session sqlx.Session) TServiceModel
	}

	customTServiceModel struct {
		*defaultTServiceModel
	}
)

// NewTServiceModel returns a model for the database table.
func NewTServiceModel(conn sqlx.SqlConn) TServiceModel {
	return &customTServiceModel{
		defaultTServiceModel: newTServiceModel(conn),
	}
}

func (m *customTServiceModel) FindPage(ctx context.Context, page, pageSize int64) ([]TService, int64, error) {
	var total int64
	if err := m.conn.QueryRowCtx(ctx, &total, fmt.Sprintf("select count(*) from %s", m.table)); err != nil {
		return nil, 0, err
	}

	if total == 0 {
		return nil, 0, nil
	}

	offset := (page - 1) * pageSize
	query := fmt.Sprintf("select %s from %s order by `id` limit ? offset ?", tServiceRows, m.table)
	var resp []TService
	if err := m.conn.QueryRowsCtx(ctx, &resp, query, pageSize, offset); err != nil {
		return nil, 0, err
	}

	return resp, total, nil
}

func (m *customTServiceModel) withSession(session sqlx.Session) TServiceModel {
	return NewTServiceModel(sqlx.NewSqlConnFromSession(session))
}