(node:43032) DeprecationWarning: Mongoose: findOneAndUpdate() and findOneAndDelete() without the useFindAndModify option set to false are deprecated. See: https://mongoosejs.com/docs/deprecations.html#findandmodify
(Use node --trace-deprecation ... to show where the warning was created)
(node:43032) DeprecationWarning: Mongoose: findOneAndUpdate() and findOneAndDelete() without the useFindAndModify option set to false are deprecated. See: https://mongoosejs.com/docs/deprecations.html#findandmodify
(Use node --trace-deprecation ... to show where the warning was created)
假设我们有一个 articles 集合，该集合下的每个文档有下面几个字段，问：使用 mongoose 如何删除集合中指定字段？db.getCollection('articles').update({}, {
$unset: {
// 这里指定要删除的列
'words': ''
false,
Executor error during find command: OperationFailed: Sort operation used more than the maximum 33554432 bytes of RAM. Add an index, or specify a smaller limit.
Executor error during find command: OperationFailed: Sort operation used more than the maximum 33554432 bytes of RAM. Add an index, or specify a smaller limit.报错解决的方法
$sample stage could not find a non-duplicate document after 100 while using a random cursor
MongoError in / $sample stage could not find a non-duplicate document after 100 while using a random cursor. This is likely a sporadic failure, please try again. (code: 28799)
