重复索引的MongoDB错误答案

【问题标题】：Mongodb error for duplicate indexes重复索引的MongoDB错误
【发布时间】：2017-01-06 04:42:38
【问题描述】：

我是 MongoDB/Mongoose 的新手，并且正在转储我的 localdb 以便为 heroku 创建一个数据库。当我运行 mongorestore 时，出现以下错误：

2016-08-29T22:05:00.411-0500    building a list of collections to restore from /Users/micahsherman/tmp/mongodump/Loc8r dir
2016-08-29T22:05:00.518-0500    reading metadata for heroku_n1kxxxxxx.locations from /Users/micahsherman/tmp/mongodump/Loc8r/locations.metadata.json
2016-08-29T22:05:00.518-0500    reading metadata for heroku_n1kxxxxxx.test from /Users/micahsherman/tmp/mongodump/Loc8r/test.metadata.json
2016-08-29T22:05:00.519-0500    restoring heroku_n1kxxxxxx.test from /Users/micahsherman/tmp/mongodump/Loc8r/test.bson
2016-08-29T22:05:00.519-0500    restoring heroku_n1kxxxxxx.locations from /Users/micahsherman/tmp/mongodump/Loc8r/locations.bson
2016-08-29T22:05:00.520-0500    restoring indexes for collection heroku_n1kxxxxxx.test from metadata
2016-08-29T22:05:00.574-0500    finished restoring heroku_n1kxxxxxx.test (0 documents)
2016-08-29T22:05:00.799-0500    error: multiple errors in bulk operation:
  - E11000 duplicate key error index: heroku_n1kxxxxxx.locations.$_id_ dup key: { : ObjectId('57c334af05803d85c7b9e780') }
  - E11000 duplicate key error index: heroku_n1kxxxxxx.locations.$_id_ dup key: { : ObjectId('57c3819605803d85c7b9e783') }

2016-08-29T22:05:00.799-0500    restoring indexes for collection heroku_n1kxxxxxx.locations from metadata
2016-08-29T22:05:00.852-0500    finished restoring heroku_n1kxxxxxx.locations (2 documents)
2016-08-29T22:05:00.852-0500    done

这些会阻止来自 Heroku 的连接。

我已经进入控制台打印了索引，结果如下：

rs-ds017886:PRIMARY> db.system.indexes.find();
{ "v" : 1, "key" : { "_id" : 1 }, "name" : "_id_", "ns" : "heroku_n1kxxxxxx.test" }
{ "v" : 1, "key" : { "_id" : 1 }, "name" : "_id_", "ns" : "heroku_n1kxxxxxx.locations" }
{ "v" : 1, "key" : { "coords" : "2dsphere" }, "name" : "coords_2dsphere", "ns" : "heroku_n1kxxxxxx.locations", "background" : true, "2dsphereIndexVersion" : 2 }
{ "v" : 1, "key" : { "_id" : 1 }, "name" : "_id_", "ns" : "heroku_n1kxxxxxx.objectlabs-system" }
{ "v" : 1, "key" : { "_id" : 1 }, "name" : "_id_", "ns" : "heroku_n1kxxxxxx.objectlabs-system.admin.collections" }
rs-ds017886:PRIMARY>

我不太确定如何进行调试。想法？？

【问题讨论】：

标签： node.js mongodb heroku mongoose mean-stack

【解决方案1】：

仔细检查您的locations.bson 文件以确保您没有重复的文档（'57c334af05803d85c7b9e780' 和'57c3819605803d85c7b9e783'）。看起来您是在创建索引之前添加数据。

这是我认为正在发生的事情的一个例子（如果没有看到数据很难判断）

> db.people.insert({name: "Matt"})

WriteResult({ "nInserted" : 1 })

> db.people.insert({name: "Matt"})

WriteResult({ "nInserted" : 1 })

> db.people.createIndex({name: 1}, {unique: true})

{
    "ok" : 0,
    "errmsg" : "E11000 duplicate key error index: test.people.$name_1 dup key: { : \"Matt\" }",
    "code" : 11000
}

_id 字段已包含唯一约束

【讨论】：