go mongo-driver 分页查询

记录一次分页查询

借鉴原文:golang mongodb 实现分页_zhngxin的博客-CSDN博客

import (
	"context"

	"github.com/sirupsen/logrus"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/mongo"

	"go.mongodb.org/mongo-driver/mongo/options"
)

type MgoSession struct {
	Session  *mongo.Client
	Database string
}


// Find
// @Description: 查询多条数据
func (db *MgoSession) Find(collection string, selector bson.M, limit, page int64, schema interface{}) error {
	c := db.GetCollection(collection)
    // 一定要初始化,否则报错,网上很多文章都没有做这一步
	var findoptions *options.FindOptions = &options.FindOptions{}
	if limit > 0 {
		findoptions.SetLimit(limit)
		findoptions.SetSkip((limit * page) - page)
	}
	cur, err := c.Find(context.Background(), selector, findoptions)
	if err != nil {
		return err
	}

	defer cur.Close(context.Background())
	return cur.All(context.Background(), schema)
}


// 调用
var passesList []model.Passes
err := db.Find("collectionName", bson.M{"uid":"12345678"}, 1, 10, &passesList)