Class WriteConcern

constructor

• new WriteConcern(w?, wtimeoutMS?, journal?, fsync?): WriteConcern

• Constructs a WriteConcern from the write concern properties.从写关注属性构造一个WriteConcern。

  Parameters

  • Optional w: W

    request acknowledgment that the write operation has propagated to a specified number of mongod instances or to mongod instances with specified tags.请求确认写入操作已传播到指定数量的mongod实例或具有指定标记的mongod实例。

  • Optional wtimeoutMS: number

    specify a time limit to prevent write operations from blocking indefinitely指定时间限制以防止写入操作无限期地阻止

  • Optional journal: boolean

    request acknowledgment that the write operation has been written to the on-disk journal请求确认写入操作已写入磁盘上的日志

  • Optional fsync: boolean | 1

    equivalent to the j option. Is deprecated and will be removed in the next major version.相当于j选项。已弃用，并将在下一个主要版本中删除。

  Returns WriteConcern

Optional fsync

Optional j

Optional Readonly journal

Optional Readonly w

Optional wtimeout

Optional Readonly wtimeoutMS

Static apply

• apply(command, writeConcern): Document

• Apply a write concern to a command document. Will modify and return the command.将写入关注应用于命令文档。将修改并返回命令。

  Parameters

  • command: Document

  • writeConcern: WriteConcern

  Returns Document

Static fromOptions

• fromOptions(options?, inherit?): undefined | WriteConcern

• Construct a WriteConcern given an options object.在给定选项对象的情况下构造WriteConcern。

  Parameters

  • Optional options: W | WriteConcernOptions | WriteConcern

  • Optional inherit: WriteConcernOptions | WriteConcern

  Returns undefined | WriteConcern