The batchSize for the returned command cursor or if pre 2.8 the systems batch collection返回的命令游标的batchSize,如果在2.8之前,则为系统批处理集合
return BSON regular expressions as BSONRegExp instances.返回BSON正则表达式作为BSONRegExp实例。
the serializer will check if keys are valid.序列化程序将检查键是否有效。
Collation排序规则
Comment to apply to the operation.要应用于操作的注释。
In server versions pre-4.4, 'comment' must be string. 在4.4之前的服务器版本中,“comment”必须是字符串。A server error will be thrown if any other type is provided.如果提供任何其他类型,将引发服务器错误。
In server versions 4.4 and above, 'comment' can be any valid BSON type.在4.4及以上版本的服务器中,“comment”可以是任何有效的BSON类型。
Enable utf8 validation when deserializing BSON documents. Defaults to true.反序列化BSON文档时启用utf8验证。默认为true
。
Specifies the verbosity mode for the explain output.指定解释输出的详细模式。
allow to specify if there what fields we wish to return as unserialized raw buffer.允许指定是否存在我们希望作为非序列化原始缓冲区返回的字段。
serialize will not emit undefined fields (default:true)序列化不会发出未定义的字段(默认值:true
)
Since 4.0: If true, will only return the collection name in the response, and will omit additional info自4.0起:如果为true
,将仅在响应中返回集合名称,并将忽略其他信息
when deserializing a Binary will return it as a node.js Buffer instance.当反序列化Binary时,它将作为nodejs Buffer实例返回。
when deserializing a Long will fit it into a Number if it's smaller than 53 bits当反序列化Long时,如果Long小于53位,它将适合Number
when deserializing will promote BSON values to their Node.js closest equivalent types.当反序列化将把BSON值提升到它们的Nodej最接近的等效类型时。
Return BSON filled buffers from operations从操作返回BSON填充的缓冲区
Specify a read concern and level for the collection. (only MongoDB 3.2 or higher supported)指定集合的读取关注点和级别。(仅支持MongoDB 3.2或更高版本)
The preferred read preference (ReadPreference.primary, ReadPreference.primary_preferred, ReadPreference.secondary, ReadPreference.secondary_preferred, ReadPreference.nearest).首选的读取首选项(ReadPreference.primary
、ReadPreference.primary_preferred
、ReadPreference.secondary
、ReadPreference.secondary_preferred
、ReadPreference.nearest
)。
Should retry failed writes应重试失败的写入
serialize the javascript functions (default:false).序列化javascript函数(默认值:false
)。
Specify ClientSession for this command为此命令指定ClientSession
Write Concern as an object将关注点写为对象
Generated using TypeDoc
Since 4.0: If true and nameOnly is true, allows a user without the required privilege (i.e. listCollections action on the database) to run the command when access control is enforced.自4.0起:如果为true
且nameOnly为true
,则允许没有所需权限(即数据库上的listCollections操作)的用户在执行访问控制时运行该命令。