MongoDB – 尝试保存多个文档，导致模式ObjectId的重复键错误，尽pipe没有唯一的键集
我得到了这两个模式：
const Account = mongoose.model('Account', new Schema({ name: {type: String, default: '', required: true}, email: {type: String, default: '', unique: true, required: true}, hashed_password: {type: String, default: '', select: false, required: true}, role: {type: mongoose.Schema.Types.ObjectId, ref: 'Role', required: true}, organisations: [{type: mongoose.Schema.Types.ObjectId, ref: 'Organisation'}], updatedAt: {type: Date, default: null}, createdAt: {type: Date, default: new Date(), required: true} })); const Organisation = mongoose.model('Organisation', new Schema({ name: {type: String, default: '', required: true, unique: true}, email: {type: String, default: '', required: true}, accounts: {type: [{type: mongoose.Schema.Types.ObjectId, ref: 'Account'}], required: true, default: []}, declinedInvites: {type: [{type: mongoose.Schema.Types.ObjectId, ref: 'Account'}], default: []}, admins: {type: [{type: mongoose.Schema.Types.ObjectId, ref: 'Account'}], required: true, default: []}, updatedAt: {type: Date, default: null}, updatedBy: {type: mongoose.Schema.Types.ObjectId, ref: 'Account', default: null}, createdAt: {type: Date, default: new Date(), required: true}, createdBy: {type: mongoose.Schema.Types.ObjectId, ref: 'Account', default: null, required: true} })); 如果我将一个Organisation保存到数据库，然后尝试使用此路由保存另一个Organisation ：
router.post('/organisations', auth.verifyToken, (req, res, next) => { const creator = req.decoded._doc._id; const organisation = new Organisation({ name: req.body.name, email: req.body.email, accounts: [creator], declinedInvites: [], admins: [creator], createdBy: creator }); organisation.save((err, organisation) => { if (err) { return next(err); } }); });
它会抛出一个错误，如：
MongoError: E11000 duplicate key error collection: docs.organisations index: accounts_1 dup key: { : ObjectId('5a0d89e89141e410a9617746') }
对于空数组declinedInvites ，它会抛出一个错误说同样的事情，但是：
MongoError: E11000 duplicate key error collection: docs.organisations index: declinedInvites_1 dup key: { : undefined }
我不明白这里发生了什么，为什么当我没有在模式中设置unique密钥时，它会抛出重复的键错误？
就像@GrégoryNEUT指出的那样，如果你在模式中设置了一个unique键，然后删除它，那么索引仍然会在那里，就好像你还有unique键集。
解决方法是用这个命令简单地删除索引：
db.items.dropIndex('some-index-path')
或者在我的情况下，我运行我的自定义脚本刷新数据库，这解决了所有索引，这可能是一个问题，而不是必须运行它的每个索引。