udeServer/internal/model/tdirectorymodel.go

package model

import (
	"context"
	"fmt"

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

var _ TDirectoryModel = (*customTDirectoryModel)(nil)

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

	customTDirectoryModel struct {
		*defaultTDirectoryModel
	}
)

// NewTDirectoryModel returns a model for the database table.
func NewTDirectoryModel(conn sqlx.SqlConn) TDirectoryModel {
	return &customTDirectoryModel{
		defaultTDirectoryModel: newTDirectoryModel(conn),
	}
}

func (m *customTDirectoryModel) FindPage(ctx context.Context, page, pageSize int64) ([]TDirectory, 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 ?", tDirectoryRows, m.table)
	var resp []TDirectory
	if err := m.conn.QueryRowsCtx(ctx, &resp, query, pageSize, offset); err != nil {
		return nil, 0, err
	}

	return resp, total, nil
}

func (m *customTDirectoryModel) withSession(session sqlx.Session) TDirectoryModel {
	return NewTDirectoryModel(sqlx.NewSqlConnFromSession(session))
}