golang mongodb 实现分页

撸了今年阿里、头条和美团的面试，我有一个重要发现.......>>>

golang mongodb 实现分页

实现分页mongodb的官方驱动 mongo-go-driver并不像mgo一样直接。

go

import(
	"context"
	"time"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
)
func Find(database *mongo.Database,collection string,limit,index int64) (data []map[string]interface,err error){
	ctx, cannel := context.WithTimeout(context.Background(), time.Minute)
	defer cannel()
	var findoptions *options.FindOptions
	if limit > 0 {
		findoptions.SetLimit(limit)
		findoptions.SetSkip(limit * index)
	}
	cur, err := database.Collection(collection).Find(ctx, bson.M{}, findoptions)
	if err != nil {
		return nil, err
	}
	defer cur.Close(context.Background())
	err = cur.All(context.Background(), &data)
	return
}